./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/vnew1.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 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/vnew1.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 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 --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-6908dde-m [2024-09-24 23:15:51,345 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:15:51,416 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:15:51,420 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:15:51,421 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:15:51,446 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:15:51,447 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:15:51,447 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:15:51,448 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:15:51,449 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:15:51,450 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:15:51,451 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:15:51,451 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:15:51,452 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:15:51,452 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:15:51,454 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:15:51,455 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:15:51,455 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:15:51,455 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:15:51,455 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:15:51,456 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:15:51,456 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:15:51,460 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:15:51,460 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:15:51,461 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:15:51,461 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:15:51,461 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:15:51,462 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:15:51,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:15:51,462 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:15:51,462 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:15:51,462 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:15:51,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:15:51,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:15:51,463 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:15:51,463 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:15:51,464 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:15:51,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:15:51,464 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:15:51,464 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:15:51,464 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:15:51,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:15:51,466 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:15:51,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:15:51,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:15:51,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:15:51,739 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:15:51,740 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:15:51,741 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/vnew1.c [2024-09-24 23:15:53,229 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:15:53,406 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:15:53,407 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/vnew1.c [2024-09-24 23:15:53,413 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/bd1ce49cc/ae6111aa942a42f4b21fda4cc0c4f8b6/FLAG4cc3e52f3 [2024-09-24 23:15:53,793 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/bd1ce49cc/ae6111aa942a42f4b21fda4cc0c4f8b6 [2024-09-24 23:15:53,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:15:53,797 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:15:53,798 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:15:53,798 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:15:53,804 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:15:53,805 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:15:53" (1/1) ... [2024-09-24 23:15:53,805 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f49065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:53, skipping insertion in model container [2024-09-24 23:15:53,806 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:15:53" (1/1) ... [2024-09-24 23:15:53,826 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:15:53,986 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2024-09-24 23:15:54,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:15:54,027 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:15:54,043 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2024-09-24 23:15:54,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:15:54,071 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:15:54,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:54 WrapperNode [2024-09-24 23:15:54,072 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:15:54,073 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:15:54,073 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:15:54,073 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:15:54,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:54" (1/1) ... [2024-09-24 23:15:54,088 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:54" (1/1) ... [2024-09-24 23:15:54,095 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:15:54,095 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:15:54,096 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:15:54,120 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:15:54,120 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:15:54,137 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:54" (1/1) ... [2024-09-24 23:15:54,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:54" (1/1) ... [2024-09-24 23:15:54,141 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:54" (1/1) ... [2024-09-24 23:15:54,178 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-09-24 23:15:54,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:54" (1/1) ... [2024-09-24 23:15:54,179 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:54" (1/1) ... [2024-09-24 23:15:54,182 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:54" (1/1) ... [2024-09-24 23:15:54,186 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:54" (1/1) ... [2024-09-24 23:15:54,193 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:54" (1/1) ... [2024-09-24 23:15:54,194 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:54" (1/1) ... [2024-09-24 23:15:54,195 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:15:54,197 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:15:54,197 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:15:54,198 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:15:54,199 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:54" (1/1) ... [2024-09-24 23:15:54,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:15:54,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:15:54,229 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) [2024-09-24 23:15:54,233 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 [2024-09-24 23:15:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:15:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:15:54,280 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:15:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:15:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-24 23:15:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:15:54,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:15:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:15:54,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:15:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:15:54,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:15:54,350 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:15:54,353 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:15:54,513 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-24 23:15:54,517 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:15:54,551 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:15:54,551 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-24 23:15:54,551 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:15:54 BoogieIcfgContainer [2024-09-24 23:15:54,551 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:15:54,553 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:15:54,554 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:15:54,557 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:15:54,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:15:53" (1/3) ... [2024-09-24 23:15:54,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa7adde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:15:54, skipping insertion in model container [2024-09-24 23:15:54,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:15:54" (2/3) ... [2024-09-24 23:15:54,560 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa7adde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:15:54, skipping insertion in model container [2024-09-24 23:15:54,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:15:54" (3/3) ... [2024-09-24 23:15:54,561 INFO L112 eAbstractionObserver]: Analyzing ICFG vnew1.c [2024-09-24 23:15:54,577 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:15:54,578 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:15:54,639 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:15:54,646 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;@4c95f8cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:15:54,647 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:15:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:15:54,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-24 23:15:54,658 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:15:54,659 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:15:54,660 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:15:54,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:54,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1892212544, now seen corresponding path program 1 times [2024-09-24 23:15:54,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:15:54,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665887884] [2024-09-24 23:15:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:15:54,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:15:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:55,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:15:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:55,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:15:55,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665887884] [2024-09-24 23:15:55,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665887884] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:15:55,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:15:55,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-24 23:15:55,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769714807] [2024-09-24 23:15:55,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:15:55,449 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-24 23:15:55,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:15:55,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-24 23:15:55,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:15:55,495 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:15:55,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:15:55,820 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-09-24 23:15:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-24 23:15:55,823 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-24 23:15:55,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:15:55,831 INFO L225 Difference]: With dead ends: 46 [2024-09-24 23:15:55,836 INFO L226 Difference]: Without dead ends: 26 [2024-09-24 23:15:55,842 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-09-24 23:15:55,846 INFO L434 NwaCegarLoop]: 4 mSDtfsCounter, 57 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:15:55,847 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 27 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:15:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-24 23:15:55,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-09-24 23:15:55,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:15:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2024-09-24 23:15:55,885 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2024-09-24 23:15:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:15:55,886 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2024-09-24 23:15:55,887 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:15:55,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2024-09-24 23:15:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-24 23:15:55,889 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:15:55,889 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:15:55,889 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:15:55,890 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:15:55,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash 706153222, now seen corresponding path program 1 times [2024-09-24 23:15:55,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:15:55,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065196394] [2024-09-24 23:15:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:15:55,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:15:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:56,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:15:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:56,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:15:56,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065196394] [2024-09-24 23:15:56,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065196394] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:15:56,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562637515] [2024-09-24 23:15:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:15:56,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:15:56,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:15:56,385 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) [2024-09-24 23:15:56,387 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:15:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:56,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-24 23:15:56,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:15:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:56,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:15:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:57,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562637515] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:15:57,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:15:57,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2024-09-24 23:15:57,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923633716] [2024-09-24 23:15:57,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:15:57,150 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:15:57,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:15:57,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:15:57,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:15:57,155 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:15:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:15:57,933 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-09-24 23:15:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-24 23:15:57,934 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-09-24 23:15:57,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:15:57,937 INFO L225 Difference]: With dead ends: 50 [2024-09-24 23:15:57,937 INFO L226 Difference]: Without dead ends: 48 [2024-09-24 23:15:57,938 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2024-09-24 23:15:57,939 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 90 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:15:57,939 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 25 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:15:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-24 23:15:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2024-09-24 23:15:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-24 23:15:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2024-09-24 23:15:57,959 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 14 [2024-09-24 23:15:57,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:15:57,960 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2024-09-24 23:15:57,960 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:15:57,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2024-09-24 23:15:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-24 23:15:57,962 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:15:57,962 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:15:57,981 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 23:15:58,163 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:15:58,163 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:15:58,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:58,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1759027392, now seen corresponding path program 2 times [2024-09-24 23:15:58,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:15:58,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572150] [2024-09-24 23:15:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:15:58,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:15:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:58,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:15:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:58,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:15:58,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572150] [2024-09-24 23:15:58,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572150] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:15:58,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47444198] [2024-09-24 23:15:58,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:15:58,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:15:58,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:15:58,578 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) [2024-09-24 23:15:58,580 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:15:58,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:15:58,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:15:58,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-24 23:15:58,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:15:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:58,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:15:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:59,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47444198] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:15:59,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:15:59,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-09-24 23:15:59,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934903303] [2024-09-24 23:15:59,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:15:59,274 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-24 23:15:59,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:15:59,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-24 23:15:59,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2024-09-24 23:15:59,277 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:16:00,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:16:00,902 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2024-09-24 23:16:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-24 23:16:00,903 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-24 23:16:00,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:16:00,905 INFO L225 Difference]: With dead ends: 82 [2024-09-24 23:16:00,905 INFO L226 Difference]: Without dead ends: 80 [2024-09-24 23:16:00,906 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=373, Invalid=1607, Unknown=0, NotChecked=0, Total=1980 [2024-09-24 23:16:00,907 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 154 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:16:00,908 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 28 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-24 23:16:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-24 23:16:00,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2024-09-24 23:16:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 38 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-24 23:16:00,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2024-09-24 23:16:00,931 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 17 [2024-09-24 23:16:00,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:16:00,931 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2024-09-24 23:16:00,931 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:16:00,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:16:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2024-09-24 23:16:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-24 23:16:00,933 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:16:00,933 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:16:00,950 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-24 23:16:01,133 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:16:01,134 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:16:01,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:16:01,134 INFO L85 PathProgramCache]: Analyzing trace with hash 447679010, now seen corresponding path program 1 times [2024-09-24 23:16:01,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:16:01,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004942700] [2024-09-24 23:16:01,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:16:01,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:16:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:16:01,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:16:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:16:01,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-24 23:16:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:16:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:16:01,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:16:01,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004942700] [2024-09-24 23:16:01,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004942700] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:16:01,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870722093] [2024-09-24 23:16:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:16:01,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:16:01,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:16:01,580 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) [2024-09-24 23:16:01,582 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:16:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:16:01,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-24 23:16:01,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:16:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:16:01,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:16:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:16:02,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870722093] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:16:02,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:16:02,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 23 [2024-09-24 23:16:02,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418526178] [2024-09-24 23:16:02,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:16:02,114 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-24 23:16:02,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:16:02,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-24 23:16:02,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-09-24 23:16:02,116 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 20 states have internal predecessors, (38), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-24 23:16:04,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:16:04,369 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2024-09-24 23:16:04,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-24 23:16:04,373 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 20 states have internal predecessors, (38), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 23 [2024-09-24 23:16:04,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:16:04,374 INFO L225 Difference]: With dead ends: 93 [2024-09-24 23:16:04,374 INFO L226 Difference]: Without dead ends: 91 [2024-09-24 23:16:04,375 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2024-09-24 23:16:04,376 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 102 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-24 23:16:04,379 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 41 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-24 23:16:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-09-24 23:16:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2024-09-24 23:16:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 71 states have internal predecessors, (79), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 10 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-24 23:16:04,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2024-09-24 23:16:04,452 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 23 [2024-09-24 23:16:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:16:04,452 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2024-09-24 23:16:04,452 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 20 states have internal predecessors, (38), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-24 23:16:04,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:16:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2024-09-24 23:16:04,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-24 23:16:04,454 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:16:04,454 INFO L216 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:16:04,470 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 23:16:04,658 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:16:04,659 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:16:04,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:16:04,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1692277824, now seen corresponding path program 3 times [2024-09-24 23:16:04,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:16:04,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40158346] [2024-09-24 23:16:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:16:04,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:16:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:16:05,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:16:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:16:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:16:05,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:16:05,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40158346] [2024-09-24 23:16:05,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40158346] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:16:05,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626034833] [2024-09-24 23:16:05,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:16:05,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:16:05,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:16:05,394 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) [2024-09-24 23:16:05,398 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:16:05,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-24 23:16:05,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:16:05,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-24 23:16:05,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:16:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:16:06,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:16:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:16:06,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626034833] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:16:06,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:16:06,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 48 [2024-09-24 23:16:06,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678137620] [2024-09-24 23:16:06,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:16:06,989 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-24 23:16:06,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:16:06,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-24 23:16:06,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1880, Unknown=0, NotChecked=0, Total=2256 [2024-09-24 23:16:06,991 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:16:18,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:16:27,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:16:28,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:16:28,633 INFO L93 Difference]: Finished difference Result 151 states and 195 transitions. [2024-09-24 23:16:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-24 23:16:28,634 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-09-24 23:16:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:16:28,635 INFO L225 Difference]: With dead ends: 151 [2024-09-24 23:16:28,635 INFO L226 Difference]: Without dead ends: 149 [2024-09-24 23:16:28,638 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1319, Invalid=5821, Unknown=0, NotChecked=0, Total=7140 [2024-09-24 23:16:28,639 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 384 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 173 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:16:28,639 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 76 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1459 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2024-09-24 23:16:28,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-24 23:16:28,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 126. [2024-09-24 23:16:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 96 states have (on average 1.3020833333333333) internal successors, (125), 105 states have internal predecessors, (125), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (20), 11 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-24 23:16:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2024-09-24 23:16:28,713 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 25 [2024-09-24 23:16:28,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:16:28,713 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2024-09-24 23:16:28,714 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:16:28,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:16:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2024-09-24 23:16:28,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-24 23:16:28,716 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:16:28,716 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:16:28,729 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-24 23:16:28,918 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:16:28,918 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:16:28,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:16:28,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1835559814, now seen corresponding path program 2 times [2024-09-24 23:16:28,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:16:28,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806371729] [2024-09-24 23:16:28,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:16:28,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:16:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:16:29,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:16:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:16:29,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:16:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:16:29,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-24 23:16:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:16:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:16:29,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:16:29,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806371729] [2024-09-24 23:16:29,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806371729] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:16:29,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341151750] [2024-09-24 23:16:29,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:16:29,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:16:29,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:16:29,256 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) [2024-09-24 23:16:29,257 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 23:16:29,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:16:29,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:16:29,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-24 23:16:29,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:16:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:16:29,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:16:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:16:29,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341151750] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:16:29,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:16:29,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2024-09-24 23:16:29,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126080424] [2024-09-24 23:16:29,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:16:29,806 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-24 23:16:29,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:16:29,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-24 23:16:29,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-09-24 23:16:29,807 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-24 23:16:30,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:16:30,384 INFO L93 Difference]: Finished difference Result 161 states and 204 transitions. [2024-09-24 23:16:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-24 23:16:30,384 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 28 [2024-09-24 23:16:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:16:30,388 INFO L225 Difference]: With dead ends: 161 [2024-09-24 23:16:30,388 INFO L226 Difference]: Without dead ends: 118 [2024-09-24 23:16:30,389 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2024-09-24 23:16:30,390 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:16:30,391 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 31 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:16:30,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-24 23:16:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-09-24 23:16:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 90 states have (on average 1.288888888888889) internal successors, (116), 98 states have internal predecessors, (116), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (19), 11 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-24 23:16:30,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 155 transitions. [2024-09-24 23:16:30,482 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 155 transitions. Word has length 28 [2024-09-24 23:16:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:16:30,483 INFO L474 AbstractCegarLoop]: Abstraction has 118 states and 155 transitions. [2024-09-24 23:16:30,483 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-24 23:16:30,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:16:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 155 transitions. [2024-09-24 23:16:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-24 23:16:30,487 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:16:30,487 INFO L216 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:16:30,505 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-24 23:16:30,688 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-24 23:16:30,688 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:16:30,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:16:30,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2066924416, now seen corresponding path program 3 times [2024-09-24 23:16:30,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:16:30,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295266092] [2024-09-24 23:16:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:16:30,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:16:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:16:31,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:16:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:16:31,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:16:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:16:31,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-24 23:16:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:16:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:16:31,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:16:31,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295266092] [2024-09-24 23:16:31,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295266092] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:16:31,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132475213] [2024-09-24 23:16:31,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:16:31,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:16:31,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:16:31,755 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) [2024-09-24 23:16:31,756 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 23:16:31,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-24 23:16:31,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:16:31,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-24 23:16:31,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:16:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:16:32,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:17:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:17:01,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132475213] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:17:01,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:17:01,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 13] total 37 [2024-09-24 23:17:01,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077139053] [2024-09-24 23:17:01,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:17:01,417 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-24 23:17:01,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:17:01,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-24 23:17:01,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1151, Unknown=4, NotChecked=0, Total=1332 [2024-09-24 23:17:01,418 INFO L87 Difference]: Start difference. First operand 118 states and 155 transitions. Second operand has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-24 23:17:05,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:17:14,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:17:20,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:17:20,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:17:20,129 INFO L93 Difference]: Finished difference Result 171 states and 218 transitions. [2024-09-24 23:17:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-24 23:17:20,130 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 33 [2024-09-24 23:17:20,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:17:20,131 INFO L225 Difference]: With dead ends: 171 [2024-09-24 23:17:20,131 INFO L226 Difference]: Without dead ends: 169 [2024-09-24 23:17:20,132 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=551, Invalid=2984, Unknown=5, NotChecked=0, Total=3540 [2024-09-24 23:17:20,133 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 168 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 72 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2024-09-24 23:17:20,134 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 44 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 551 Invalid, 3 Unknown, 0 Unchecked, 12.9s Time] [2024-09-24 23:17:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-09-24 23:17:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2024-09-24 23:17:20,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 125 states have (on average 1.208) internal successors, (151), 136 states have internal predecessors, (151), 33 states have call successors, (33), 11 states have call predecessors, (33), 10 states have return successors, (32), 21 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-24 23:17:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 216 transitions. [2024-09-24 23:17:20,216 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 216 transitions. Word has length 33 [2024-09-24 23:17:20,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:17:20,216 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 216 transitions. [2024-09-24 23:17:20,217 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-24 23:17:20,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:17:20,217 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 216 transitions. [2024-09-24 23:17:20,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-24 23:17:20,219 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:17:20,219 INFO L216 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:17:20,236 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-24 23:17:20,423 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:17:20,424 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:17:20,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:17:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2049998720, now seen corresponding path program 4 times [2024-09-24 23:17:20,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:17:20,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568471724] [2024-09-24 23:17:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:17:20,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:17:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:21,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:17:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:21,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:17:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:21,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-24 23:17:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:17:21,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:17:21,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568471724] [2024-09-24 23:17:21,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568471724] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:17:21,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033778112] [2024-09-24 23:17:21,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:17:21,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:17:21,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:17:21,620 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) [2024-09-24 23:17:21,621 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-24 23:17:21,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:17:21,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:17:21,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-24 23:17:21,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:17:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:17:22,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:17:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:17:24,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033778112] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:17:24,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:17:24,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 60 [2024-09-24 23:17:24,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572269328] [2024-09-24 23:17:24,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:17:24,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-24 23:17:24,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:17:24,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-24 23:17:24,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=3000, Unknown=0, NotChecked=0, Total=3540 [2024-09-24 23:17:24,050 INFO L87 Difference]: Start difference. First operand 169 states and 216 transitions. Second operand has 60 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 57 states have internal predecessors, (78), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-24 23:17:31,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:17:31,214 INFO L93 Difference]: Finished difference Result 224 states and 282 transitions. [2024-09-24 23:17:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-24 23:17:31,216 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 57 states have internal predecessors, (78), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2024-09-24 23:17:31,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:17:31,218 INFO L225 Difference]: With dead ends: 224 [2024-09-24 23:17:31,218 INFO L226 Difference]: Without dead ends: 222 [2024-09-24 23:17:31,220 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1321, Invalid=6689, Unknown=0, NotChecked=0, Total=8010 [2024-09-24 23:17:31,221 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 276 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:17:31,221 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 67 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-24 23:17:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-24 23:17:31,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 212. [2024-09-24 23:17:31,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 153 states have (on average 1.1699346405228759) internal successors, (179), 168 states have internal predecessors, (179), 46 states have call successors, (46), 13 states have call predecessors, (46), 12 states have return successors, (45), 30 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-24 23:17:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2024-09-24 23:17:31,323 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 41 [2024-09-24 23:17:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:17:31,323 INFO L474 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2024-09-24 23:17:31,323 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 57 states have internal predecessors, (78), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-24 23:17:31,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:17:31,324 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2024-09-24 23:17:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-24 23:17:31,325 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:17:31,326 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:17:31,344 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-24 23:17:31,526 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:17:31,526 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:17:31,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:17:31,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1054157638, now seen corresponding path program 5 times [2024-09-24 23:17:31,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:17:31,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021908469] [2024-09-24 23:17:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:17:31,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:17:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:32,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:17:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:32,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-24 23:17:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:32,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-24 23:17:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:32,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-24 23:17:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:32,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-24 23:17:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:17:32,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:17:32,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021908469] [2024-09-24 23:17:32,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021908469] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:17:32,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100453704] [2024-09-24 23:17:32,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:17:32,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:17:32,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:17:32,210 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) [2024-09-24 23:17:32,212 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-24 23:17:32,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-24 23:17:32,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:17:32,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-24 23:17:32,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:17:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:17:32,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:17:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:17:33,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100453704] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:17:33,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:17:33,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 38 [2024-09-24 23:17:33,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473892368] [2024-09-24 23:17:33,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:17:33,808 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-24 23:17:33,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:17:33,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-24 23:17:33,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2024-09-24 23:17:33,809 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 17 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-24 23:17:39,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:17:39,829 INFO L93 Difference]: Finished difference Result 253 states and 315 transitions. [2024-09-24 23:17:39,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-24 23:17:39,829 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 17 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 44 [2024-09-24 23:17:39,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:17:39,831 INFO L225 Difference]: With dead ends: 253 [2024-09-24 23:17:39,831 INFO L226 Difference]: Without dead ends: 224 [2024-09-24 23:17:39,833 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=662, Invalid=3628, Unknown=0, NotChecked=0, Total=4290 [2024-09-24 23:17:39,833 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 177 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:17:39,833 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 67 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-24 23:17:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-09-24 23:17:39,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2024-09-24 23:17:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 160 states have (on average 1.15625) internal successors, (185), 174 states have internal predecessors, (185), 48 states have call successors, (48), 14 states have call predecessors, (48), 13 states have return successors, (47), 33 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-24 23:17:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 280 transitions. [2024-09-24 23:17:39,929 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 280 transitions. Word has length 44 [2024-09-24 23:17:39,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:17:39,930 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 280 transitions. [2024-09-24 23:17:39,930 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 17 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-24 23:17:39,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:17:39,930 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 280 transitions. [2024-09-24 23:17:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-24 23:17:39,935 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:17:39,935 INFO L216 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:17:39,948 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-24 23:17:40,135 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:17:40,136 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:17:40,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:17:40,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1495655394, now seen corresponding path program 6 times [2024-09-24 23:17:40,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:17:40,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019501035] [2024-09-24 23:17:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:17:40,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:17:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:40,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:17:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:40,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-24 23:17:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:40,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-24 23:17:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:40,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-24 23:17:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 23:17:40,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:17:40,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019501035] [2024-09-24 23:17:40,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019501035] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:17:40,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333357879] [2024-09-24 23:17:40,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:17:40,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:17:40,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:17:40,911 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) [2024-09-24 23:17:40,913 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-24 23:17:41,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-24 23:17:41,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:17:41,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-24 23:17:41,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:17:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-24 23:17:41,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:17:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 23:17:42,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333357879] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:17:42,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:17:42,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 17] total 49 [2024-09-24 23:17:42,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719726889] [2024-09-24 23:17:42,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:17:42,375 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-24 23:17:42,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:17:42,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-24 23:17:42,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1994, Unknown=0, NotChecked=0, Total=2352 [2024-09-24 23:17:42,376 INFO L87 Difference]: Start difference. First operand 222 states and 280 transitions. Second operand has 49 states, 48 states have (on average 1.5) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-24 23:17:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:17:45,281 INFO L93 Difference]: Finished difference Result 256 states and 320 transitions. [2024-09-24 23:17:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-24 23:17:45,282 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.5) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 43 [2024-09-24 23:17:45,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:17:45,284 INFO L225 Difference]: With dead ends: 256 [2024-09-24 23:17:45,284 INFO L226 Difference]: Without dead ends: 254 [2024-09-24 23:17:45,285 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=894, Invalid=4656, Unknown=0, NotChecked=0, Total=5550 [2024-09-24 23:17:45,286 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 179 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-24 23:17:45,286 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 73 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-24 23:17:45,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-24 23:17:45,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 241. [2024-09-24 23:17:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 173 states have (on average 1.1445086705202312) internal successors, (198), 187 states have internal predecessors, (198), 53 states have call successors, (53), 15 states have call predecessors, (53), 14 states have return successors, (52), 38 states have call predecessors, (52), 52 states have call successors, (52) [2024-09-24 23:17:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 303 transitions. [2024-09-24 23:17:45,387 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 303 transitions. Word has length 43 [2024-09-24 23:17:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:17:45,387 INFO L474 AbstractCegarLoop]: Abstraction has 241 states and 303 transitions. [2024-09-24 23:17:45,387 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.5) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-24 23:17:45,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:17:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 303 transitions. [2024-09-24 23:17:45,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-24 23:17:45,389 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:17:45,389 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:17:45,405 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-24 23:17:45,593 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-24 23:17:45,594 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:17:45,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:17:45,594 INFO L85 PathProgramCache]: Analyzing trace with hash -123973150, now seen corresponding path program 7 times [2024-09-24 23:17:45,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:17:45,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503740729] [2024-09-24 23:17:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:17:45,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:17:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:51,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:17:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:51,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-24 23:17:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:51,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:17:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:51,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-24 23:17:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:51,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-24 23:17:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:51,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-24 23:17:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-24 23:17:51,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:17:51,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503740729] [2024-09-24 23:17:51,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503740729] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:17:51,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094749310] [2024-09-24 23:17:51,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:17:51,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:17:51,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:17:51,546 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) [2024-09-24 23:17:51,548 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-24 23:17:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:17:51,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-24 23:17:51,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:17:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-24 23:17:52,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:17:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-24 23:17:53,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094749310] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:17:53,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:17:53,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 45 [2024-09-24 23:17:53,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232350279] [2024-09-24 23:17:53,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:17:53,023 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-24 23:17:53,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:17:53,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-24 23:17:53,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1799, Unknown=1, NotChecked=0, Total=1980 [2024-09-24 23:17:53,025 INFO L87 Difference]: Start difference. First operand 241 states and 303 transitions. Second operand has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-24 23:18:01,566 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 65 DAG size of output: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:18:09,913 WARN L293 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 54 DAG size of output: 50 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:18:18,057 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 35 DAG size of output: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:18:26,328 WARN L293 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:18:34,828 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 29 DAG size of output: 27 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:18:44,215 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:18:44,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:18:44,501 INFO L93 Difference]: Finished difference Result 295 states and 357 transitions. [2024-09-24 23:18:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-24 23:18:44,501 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 53 [2024-09-24 23:18:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:18:44,503 INFO L225 Difference]: With dead ends: 295 [2024-09-24 23:18:44,503 INFO L226 Difference]: Without dead ends: 239 [2024-09-24 23:18:44,505 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 55.5s TimeCoverageRelationStatistics Valid=613, Invalid=4642, Unknown=1, NotChecked=0, Total=5256 [2024-09-24 23:18:44,505 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 174 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-24 23:18:44,506 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 82 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-24 23:18:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-09-24 23:18:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2024-09-24 23:18:44,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 172 states have (on average 1.1337209302325582) internal successors, (195), 185 states have internal predecessors, (195), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (47), 34 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-24 23:18:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 290 transitions. [2024-09-24 23:18:44,594 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 290 transitions. Word has length 53 [2024-09-24 23:18:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:18:44,594 INFO L474 AbstractCegarLoop]: Abstraction has 238 states and 290 transitions. [2024-09-24 23:18:44,594 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-24 23:18:44,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:18:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 290 transitions. [2024-09-24 23:18:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-24 23:18:44,596 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:18:44,596 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:18:44,611 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-24 23:18:44,796 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-24 23:18:44,796 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:18:44,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:18:44,797 INFO L85 PathProgramCache]: Analyzing trace with hash -978711902, now seen corresponding path program 8 times [2024-09-24 23:18:44,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:18:44,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267772944] [2024-09-24 23:18:44,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:18:44,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:18:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:18:46,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:18:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:18:46,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:18:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:18:46,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:18:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:18:46,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-24 23:18:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:18:46,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-24 23:18:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:18:46,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-24 23:18:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:18:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-24 23:18:46,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:18:46,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267772944] [2024-09-24 23:18:46,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267772944] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:18:46,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486502996] [2024-09-24 23:18:46,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:18:46,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:18:46,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:18:46,160 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) [2024-09-24 23:18:46,161 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-24 23:18:46,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:18:46,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:18:46,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-24 23:18:46,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:18:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-24 23:18:47,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:18:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-24 23:18:48,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486502996] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:18:48,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:18:48,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 17] total 51 [2024-09-24 23:18:48,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418657671] [2024-09-24 23:18:48,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:18:48,074 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-24 23:18:48,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:18:48,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-24 23:18:48,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2360, Unknown=0, NotChecked=0, Total=2550 [2024-09-24 23:18:48,076 INFO L87 Difference]: Start difference. First operand 238 states and 290 transitions. Second operand has 51 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 20 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-24 23:18:54,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:19:08,439 WARN L293 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 53 DAG size of output: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:19:12,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:19:32,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:19:50,115 WARN L293 SmtUtils]: Spent 13.65s on a formula simplification. DAG size of input: 64 DAG size of output: 52 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)