./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i25_o25-1.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 2409cd2f018515417b0b6bf5d396e4bc80c02540769112137ebf388167bdf776 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 15:13:39,587 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 15:13:39,638 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 15:13:39,642 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 15:13:39,642 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 15:13:39,670 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 15:13:39,670 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 15:13:39,671 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 15:13:39,671 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 15:13:39,672 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 15:13:39,672 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 15:13:39,673 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 15:13:39,673 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 15:13:39,674 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 15:13:39,674 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 15:13:39,674 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 15:13:39,675 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 15:13:39,675 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 15:13:39,675 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 15:13:39,676 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 15:13:39,676 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 15:13:39,677 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 15:13:39,677 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 15:13:39,678 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 15:13:39,678 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 15:13:39,678 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 15:13:39,679 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 15:13:39,679 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 15:13:39,679 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 15:13:39,679 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 15:13:39,680 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 15:13:39,680 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 15:13:39,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:13:39,681 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 15:13:39,681 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 15:13:39,681 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 15:13:39,682 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 15:13:39,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 15:13:39,682 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 15:13:39,683 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 15:13:39,683 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 15:13:39,684 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 15:13:39,684 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2409cd2f018515417b0b6bf5d396e4bc80c02540769112137ebf388167bdf776 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 15:13:39,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 15:13:40,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 15:13:40,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 15:13:40,013 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 15:13:40,013 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 15:13:40,014 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2024-10-15 15:13:41,360 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 15:13:41,545 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 15:13:41,546 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2024-10-15 15:13:41,552 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/67616a7ed/c39dd3cb69e840feb3c6e6936f662649/FLAG807087a62 [2024-10-15 15:13:41,960 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/67616a7ed/c39dd3cb69e840feb3c6e6936f662649 [2024-10-15 15:13:41,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 15:13:41,963 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 15:13:41,964 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 15:13:41,964 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 15:13:41,971 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 15:13:41,972 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:13:41" (1/1) ... [2024-10-15 15:13:41,972 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ef0d90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:41, skipping insertion in model container [2024-10-15 15:13:41,973 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:13:41" (1/1) ... [2024-10-15 15:13:41,992 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 15:13:42,162 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/recursive-simple/id_i25_o25-1.c[454,467] [2024-10-15 15:13:42,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:13:42,178 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 15:13:42,192 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/recursive-simple/id_i25_o25-1.c[454,467] [2024-10-15 15:13:42,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:13:42,213 INFO L204 MainTranslator]: Completed translation [2024-10-15 15:13:42,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:42 WrapperNode [2024-10-15 15:13:42,214 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 15:13:42,215 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 15:13:42,215 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 15:13:42,216 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 15:13:42,222 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:42" (1/1) ... [2024-10-15 15:13:42,228 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:42" (1/1) ... [2024-10-15 15:13:42,238 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 15:13:42,238 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 15:13:42,239 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 15:13:42,239 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 15:13:42,239 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 15:13:42,250 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:42" (1/1) ... [2024-10-15 15:13:42,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:42" (1/1) ... [2024-10-15 15:13:42,252 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:42" (1/1) ... [2024-10-15 15:13:42,262 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-15 15:13:42,263 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:42" (1/1) ... [2024-10-15 15:13:42,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:42" (1/1) ... [2024-10-15 15:13:42,267 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:42" (1/1) ... [2024-10-15 15:13:42,271 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:42" (1/1) ... [2024-10-15 15:13:42,272 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:42" (1/1) ... [2024-10-15 15:13:42,272 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:42" (1/1) ... [2024-10-15 15:13:42,274 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 15:13:42,277 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 15:13:42,277 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 15:13:42,278 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 15:13:42,279 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:42" (1/1) ... [2024-10-15 15:13:42,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:13:42,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:13:42,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-15 15:13:42,322 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-15 15:13:42,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 15:13:42,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 15:13:42,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 15:13:42,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 15:13:42,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 15:13:42,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 15:13:42,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 15:13:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 15:13:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-10-15 15:13:42,372 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-10-15 15:13:42,435 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 15:13:42,437 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 15:13:42,558 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-10-15 15:13:42,558 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 15:13:42,597 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 15:13:42,597 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-15 15:13:42,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:13:42 BoogieIcfgContainer [2024-10-15 15:13:42,602 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 15:13:42,604 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 15:13:42,604 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 15:13:42,609 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 15:13:42,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:13:41" (1/3) ... [2024-10-15 15:13:42,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643c926e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:13:42, skipping insertion in model container [2024-10-15 15:13:42,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:13:42" (2/3) ... [2024-10-15 15:13:42,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643c926e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:13:42, skipping insertion in model container [2024-10-15 15:13:42,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:13:42" (3/3) ... [2024-10-15 15:13:42,614 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2024-10-15 15:13:42,629 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 15:13:42,629 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 15:13:42,672 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 15:13:42,678 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6fb7fac6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 15:13:42,679 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 15:13:42,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-15 15:13:42,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-15 15:13:42,689 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:13:42,689 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:13:42,690 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:13:42,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:42,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2082045565, now seen corresponding path program 1 times [2024-10-15 15:13:42,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:13:42,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019255097] [2024-10-15 15:13:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:42,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:13:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:42,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:13:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:42,882 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:13:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:13:42,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:13:42,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019255097] [2024-10-15 15:13:42,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019255097] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:13:42,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:13:42,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 15:13:42,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607940439] [2024-10-15 15:13:42,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:13:42,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 15:13:42,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:13:42,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 15:13:42,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 15:13:42,952 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-15 15:13:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:13:43,001 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-10-15 15:13:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 15:13:43,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2024-10-15 15:13:43,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:13:43,011 INFO L225 Difference]: With dead ends: 30 [2024-10-15 15:13:43,011 INFO L226 Difference]: Without dead ends: 18 [2024-10-15 15:13:43,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 15:13:43,019 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 15:13:43,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 15:13:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-15 15:13:43,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-15 15:13:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-15 15:13:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-10-15 15:13:43,058 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-10-15 15:13:43,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:13:43,058 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-10-15 15:13:43,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-15 15:13:43,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:43,059 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-10-15 15:13:43,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-15 15:13:43,060 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:13:43,060 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:13:43,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 15:13:43,060 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:13:43,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:43,061 INFO L85 PathProgramCache]: Analyzing trace with hash -799337521, now seen corresponding path program 1 times [2024-10-15 15:13:43,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:13:43,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665437159] [2024-10-15 15:13:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:43,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:13:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:43,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:13:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:43,141 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:13:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:43,238 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 15:13:43,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:13:43,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665437159] [2024-10-15 15:13:43,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665437159] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:13:43,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338981202] [2024-10-15 15:13:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:43,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:43,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:13:43,316 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:13:43,318 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 15:13:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:43,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-15 15:13:43,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:13:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 15:13:43,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:13:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 15:13:43,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338981202] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:13:43,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:13:43,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-10-15 15:13:43,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637851177] [2024-10-15 15:13:43,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:13:43,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-15 15:13:43,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:13:43,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-15 15:13:43,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-10-15 15:13:43,700 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-15 15:13:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:13:43,763 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-10-15 15:13:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 15:13:43,764 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) Word has length 19 [2024-10-15 15:13:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:13:43,765 INFO L225 Difference]: With dead ends: 25 [2024-10-15 15:13:43,765 INFO L226 Difference]: Without dead ends: 21 [2024-10-15 15:13:43,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-10-15 15:13:43,768 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 15:13:43,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 50 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 15:13:43,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-15 15:13:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-15 15:13:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-15 15:13:43,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-10-15 15:13:43,780 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2024-10-15 15:13:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:13:43,781 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-10-15 15:13:43,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-15 15:13:43,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-10-15 15:13:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-15 15:13:43,784 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:13:43,784 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:13:43,798 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-15 15:13:43,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:43,985 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:13:43,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:43,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1955994435, now seen corresponding path program 2 times [2024-10-15 15:13:43,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:13:43,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327521160] [2024-10-15 15:13:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:43,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:13:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:44,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:13:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:44,082 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:13:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:44,192 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:44,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-15 15:13:44,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:13:44,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327521160] [2024-10-15 15:13:44,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327521160] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:13:44,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59077330] [2024-10-15 15:13:44,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:13:44,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:44,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:13:44,296 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:13:44,298 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 15:13:44,348 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:13:44,348 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:13:44,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-15 15:13:44,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:13:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-15 15:13:44,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:13:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-15 15:13:44,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59077330] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:13:44,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:13:44,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 14 [2024-10-15 15:13:44,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965420305] [2024-10-15 15:13:44,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:13:44,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-15 15:13:44,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:13:44,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-15 15:13:44,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-15 15:13:44,769 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-15 15:13:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:13:44,844 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-10-15 15:13:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-15 15:13:44,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 25 [2024-10-15 15:13:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:13:44,846 INFO L225 Difference]: With dead ends: 28 [2024-10-15 15:13:44,846 INFO L226 Difference]: Without dead ends: 24 [2024-10-15 15:13:44,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2024-10-15 15:13:44,847 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:13:44,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:13:44,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-15 15:13:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-15 15:13:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-15 15:13:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-10-15 15:13:44,859 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2024-10-15 15:13:44,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:13:44,860 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-10-15 15:13:44,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-15 15:13:44,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:44,861 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-10-15 15:13:44,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-15 15:13:44,861 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:13:44,861 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:13:44,878 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-15 15:13:45,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:45,066 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:13:45,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:45,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1072241521, now seen corresponding path program 3 times [2024-10-15 15:13:45,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:13:45,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577504031] [2024-10-15 15:13:45,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:45,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:13:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:45,114 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:13:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:45,117 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:13:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:45,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:45,239 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:45,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:13:45,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:13:45,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577504031] [2024-10-15 15:13:45,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577504031] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:13:45,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651605522] [2024-10-15 15:13:45,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 15:13:45,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:45,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:13:45,297 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:13:45,298 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 15:13:45,352 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 15:13:45,353 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:13:45,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-15 15:13:45,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:13:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 15:13:45,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:13:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 15:13:45,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651605522] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:13:45,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:13:45,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 16 [2024-10-15 15:13:45,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835287783] [2024-10-15 15:13:45,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:13:45,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 15:13:45,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:13:45,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 15:13:45,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-10-15 15:13:45,929 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-15 15:13:46,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:13:46,005 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-10-15 15:13:46,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 15:13:46,005 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) Word has length 31 [2024-10-15 15:13:46,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:13:46,007 INFO L225 Difference]: With dead ends: 31 [2024-10-15 15:13:46,008 INFO L226 Difference]: Without dead ends: 27 [2024-10-15 15:13:46,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-10-15 15:13:46,009 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 15:13:46,011 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 74 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 15:13:46,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-15 15:13:46,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-15 15:13:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-15 15:13:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-10-15 15:13:46,022 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2024-10-15 15:13:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:13:46,022 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-10-15 15:13:46,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-15 15:13:46,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-10-15 15:13:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-15 15:13:46,025 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:13:46,025 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:13:46,045 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-15 15:13:46,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:46,226 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:13:46,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:46,226 INFO L85 PathProgramCache]: Analyzing trace with hash -790562051, now seen corresponding path program 4 times [2024-10-15 15:13:46,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:13:46,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579874480] [2024-10-15 15:13:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:46,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:13:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:46,280 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:13:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:46,283 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:13:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:46,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:46,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:46,426 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:46,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 15:13:46,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:13:46,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579874480] [2024-10-15 15:13:46,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579874480] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:13:46,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524087545] [2024-10-15 15:13:46,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 15:13:46,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:46,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:13:46,474 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:13:46,475 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 15:13:46,520 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 15:13:46,520 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:13:46,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-15 15:13:46,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:13:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-15 15:13:46,604 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:13:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 15:13:47,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524087545] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:13:47,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:13:47,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 18 [2024-10-15 15:13:47,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075132923] [2024-10-15 15:13:47,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:13:47,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 15:13:47,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:13:47,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 15:13:47,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2024-10-15 15:13:47,329 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2024-10-15 15:13:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:13:47,409 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-10-15 15:13:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 15:13:47,412 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) Word has length 37 [2024-10-15 15:13:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:13:47,413 INFO L225 Difference]: With dead ends: 34 [2024-10-15 15:13:47,413 INFO L226 Difference]: Without dead ends: 30 [2024-10-15 15:13:47,413 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2024-10-15 15:13:47,414 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 15:13:47,414 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 90 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 15:13:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-15 15:13:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-15 15:13:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-15 15:13:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-10-15 15:13:47,424 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-10-15 15:13:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:13:47,424 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-10-15 15:13:47,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2024-10-15 15:13:47,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-10-15 15:13:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-15 15:13:47,426 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:13:47,426 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:13:47,443 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-15 15:13:47,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:47,627 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:13:47,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:47,628 INFO L85 PathProgramCache]: Analyzing trace with hash 446137679, now seen corresponding path program 5 times [2024-10-15 15:13:47,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:13:47,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579683296] [2024-10-15 15:13:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:47,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:13:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:47,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:13:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:47,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:13:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:47,783 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:47,833 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:47,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:47,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:47,914 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-15 15:13:47,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:13:47,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579683296] [2024-10-15 15:13:47,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579683296] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:13:47,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485575167] [2024-10-15 15:13:47,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 15:13:47,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:47,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:13:47,947 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:13:47,948 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 15:13:48,000 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-15 15:13:48,000 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:13:48,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-15 15:13:48,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:13:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-15 15:13:48,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:13:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 15:13:49,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485575167] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:13:49,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:13:49,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 20 [2024-10-15 15:13:49,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434558356] [2024-10-15 15:13:49,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:13:49,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 15:13:49,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:13:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 15:13:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2024-10-15 15:13:49,204 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-10-15 15:13:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:13:49,309 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-10-15 15:13:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 15:13:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) Word has length 43 [2024-10-15 15:13:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:13:49,311 INFO L225 Difference]: With dead ends: 37 [2024-10-15 15:13:49,311 INFO L226 Difference]: Without dead ends: 33 [2024-10-15 15:13:49,313 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2024-10-15 15:13:49,313 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:13:49,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 86 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:13:49,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-15 15:13:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-10-15 15:13:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-15 15:13:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-10-15 15:13:49,323 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2024-10-15 15:13:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:13:49,323 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-10-15 15:13:49,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-10-15 15:13:49,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-10-15 15:13:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-15 15:13:49,325 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:13:49,325 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:13:49,338 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-15 15:13:49,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-15 15:13:49,526 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:13:49,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:49,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1764409661, now seen corresponding path program 6 times [2024-10-15 15:13:49,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:13:49,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705612237] [2024-10-15 15:13:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:49,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:13:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:49,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:13:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:49,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:13:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:49,695 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:49,750 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:49,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:49,826 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:49,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:49,876 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-15 15:13:49,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:13:49,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705612237] [2024-10-15 15:13:49,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705612237] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:13:49,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66419506] [2024-10-15 15:13:49,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 15:13:49,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:49,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:13:49,906 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:13:49,908 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 15:13:49,971 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-15 15:13:49,971 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:13:49,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-15 15:13:49,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:13:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-10-15 15:13:50,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:13:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-15 15:13:51,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66419506] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:13:51,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:13:51,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 22 [2024-10-15 15:13:51,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374371159] [2024-10-15 15:13:51,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:13:51,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-15 15:13:51,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:13:51,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-15 15:13:51,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2024-10-15 15:13:51,432 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-10-15 15:13:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:13:51,516 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-10-15 15:13:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-15 15:13:51,517 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) Word has length 49 [2024-10-15 15:13:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:13:51,518 INFO L225 Difference]: With dead ends: 40 [2024-10-15 15:13:51,518 INFO L226 Difference]: Without dead ends: 36 [2024-10-15 15:13:51,519 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2024-10-15 15:13:51,519 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 15:13:51,519 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 15:13:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-15 15:13:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-10-15 15:13:51,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-15 15:13:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-10-15 15:13:51,525 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2024-10-15 15:13:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:13:51,526 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-10-15 15:13:51,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-10-15 15:13:51,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-10-15 15:13:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-15 15:13:51,527 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:13:51,527 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:13:51,539 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-15 15:13:51,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:51,729 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:13:51,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:51,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1097922063, now seen corresponding path program 7 times [2024-10-15 15:13:51,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:13:51,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274579122] [2024-10-15 15:13:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:51,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:13:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:51,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:13:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:51,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:13:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:51,858 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:51,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:51,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:51,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:52,019 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:52,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:52,088 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-15 15:13:52,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:13:52,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274579122] [2024-10-15 15:13:52,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274579122] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:13:52,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760597664] [2024-10-15 15:13:52,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 15:13:52,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:52,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:13:52,123 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:13:52,124 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 15:13:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:52,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-15 15:13:52,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:13:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-10-15 15:13:52,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:13:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-15 15:13:54,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760597664] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:13:54,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:13:54,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2024-10-15 15:13:54,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892011936] [2024-10-15 15:13:54,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:13:54,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 15:13:54,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:13:54,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 15:13:54,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2024-10-15 15:13:54,074 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2024-10-15 15:13:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:13:54,193 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-10-15 15:13:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 15:13:54,194 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) Word has length 55 [2024-10-15 15:13:54,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:13:54,195 INFO L225 Difference]: With dead ends: 43 [2024-10-15 15:13:54,195 INFO L226 Difference]: Without dead ends: 39 [2024-10-15 15:13:54,196 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2024-10-15 15:13:54,196 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:13:54,197 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 116 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:13:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-15 15:13:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-10-15 15:13:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-15 15:13:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-10-15 15:13:54,209 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-10-15 15:13:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:13:54,234 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-10-15 15:13:54,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2024-10-15 15:13:54,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:54,235 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-10-15 15:13:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-15 15:13:54,235 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:13:54,235 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:13:54,255 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 15:13:54,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:54,436 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:13:54,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash 401815421, now seen corresponding path program 8 times [2024-10-15 15:13:54,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:13:54,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511152727] [2024-10-15 15:13:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:54,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:13:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:54,513 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:13:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:54,516 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:13:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:54,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:54,669 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:54,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:54,766 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:54,801 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:54,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:54,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:54,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-15 15:13:54,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:13:54,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511152727] [2024-10-15 15:13:54,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511152727] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:13:54,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006845548] [2024-10-15 15:13:54,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:13:54,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:54,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:13:54,941 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:13:54,943 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 15:13:55,060 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:13:55,060 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:13:55,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-15 15:13:55,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:13:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-15 15:13:55,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:13:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 15:13:57,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006845548] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:13:57,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:13:57,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 26 [2024-10-15 15:13:57,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018503522] [2024-10-15 15:13:57,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:13:57,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-15 15:13:57,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:13:57,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-15 15:13:57,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2024-10-15 15:13:57,717 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2024-10-15 15:13:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:13:57,836 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-10-15 15:13:57,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-15 15:13:57,836 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) Word has length 61 [2024-10-15 15:13:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:13:57,837 INFO L225 Difference]: With dead ends: 46 [2024-10-15 15:13:57,838 INFO L226 Difference]: Without dead ends: 42 [2024-10-15 15:13:57,838 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 15:13:57,839 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:13:57,839 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 121 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:13:57,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-15 15:13:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-10-15 15:13:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2024-10-15 15:13:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-10-15 15:13:57,845 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2024-10-15 15:13:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:13:57,845 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-10-15 15:13:57,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2024-10-15 15:13:57,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:57,845 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-10-15 15:13:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-15 15:13:57,846 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:13:57,846 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:13:57,863 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-15 15:13:58,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:58,051 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:13:58,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:58,051 INFO L85 PathProgramCache]: Analyzing trace with hash -281594161, now seen corresponding path program 9 times [2024-10-15 15:13:58,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:13:58,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471663510] [2024-10-15 15:13:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:58,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:13:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:58,134 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:13:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:58,136 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:13:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:58,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:58,312 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:58,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:58,433 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:58,484 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:58,529 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:58,561 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:58,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:58,610 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:13:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-10-15 15:13:58,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:13:58,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471663510] [2024-10-15 15:13:58,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471663510] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:13:58,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691691138] [2024-10-15 15:13:58,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 15:13:58,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:58,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:13:58,648 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:13:58,649 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 15:13:58,804 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-10-15 15:13:58,804 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:13:58,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-15 15:13:58,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:13:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-10-15 15:13:58,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:14:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-15 15:14:02,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691691138] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:14:02,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:14:02,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 28 [2024-10-15 15:14:02,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102386215] [2024-10-15 15:14:02,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:14:02,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-15 15:14:02,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:14:02,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-15 15:14:02,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2024-10-15 15:14:02,335 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2024-10-15 15:14:02,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:14:02,451 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-10-15 15:14:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 15:14:02,451 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) Word has length 67 [2024-10-15 15:14:02,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:14:02,452 INFO L225 Difference]: With dead ends: 49 [2024-10-15 15:14:02,452 INFO L226 Difference]: Without dead ends: 45 [2024-10-15 15:14:02,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=909, Unknown=0, NotChecked=0, Total=1332 [2024-10-15 15:14:02,454 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:14:02,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 144 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:14:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-15 15:14:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-15 15:14:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-15 15:14:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-10-15 15:14:02,466 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2024-10-15 15:14:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:14:02,466 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-10-15 15:14:02,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2024-10-15 15:14:02,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:14:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-10-15 15:14:02,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-15 15:14:02,468 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:14:02,468 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:14:02,484 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-15 15:14:02,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-15 15:14:02,673 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:14:02,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:14:02,673 INFO L85 PathProgramCache]: Analyzing trace with hash 132537789, now seen corresponding path program 10 times [2024-10-15 15:14:02,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:14:02,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165058103] [2024-10-15 15:14:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:14:02,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:14:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:02,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:14:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:02,765 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:14:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:02,850 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:02,922 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:02,986 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:03,035 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:03,080 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:03,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:03,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:03,206 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:03,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:03,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-10-15 15:14:03,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:14:03,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165058103] [2024-10-15 15:14:03,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165058103] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:14:03,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559155480] [2024-10-15 15:14:03,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 15:14:03,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:14:03,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:14:03,289 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:14:03,291 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 15:14:03,497 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 15:14:03,498 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:14:03,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-15 15:14:03,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:14:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-10-15 15:14:03,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:14:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-15 15:14:08,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559155480] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:14:08,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:14:08,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 30 [2024-10-15 15:14:08,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856333984] [2024-10-15 15:14:08,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:14:08,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-15 15:14:08,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:14:08,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-15 15:14:08,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2024-10-15 15:14:08,319 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2024-10-15 15:14:08,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:14:08,457 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-10-15 15:14:08,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 15:14:08,458 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) Word has length 73 [2024-10-15 15:14:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:14:08,459 INFO L225 Difference]: With dead ends: 52 [2024-10-15 15:14:08,459 INFO L226 Difference]: Without dead ends: 48 [2024-10-15 15:14:08,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 144 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=1063, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 15:14:08,460 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:14:08,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 132 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:14:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-15 15:14:08,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-10-15 15:14:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2024-10-15 15:14:08,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-10-15 15:14:08,467 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2024-10-15 15:14:08,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:14:08,467 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-10-15 15:14:08,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2024-10-15 15:14:08,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:14:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-10-15 15:14:08,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-15 15:14:08,469 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:14:08,469 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:14:08,486 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-15 15:14:08,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-15 15:14:08,670 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:14:08,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:14:08,670 INFO L85 PathProgramCache]: Analyzing trace with hash 2004764559, now seen corresponding path program 11 times [2024-10-15 15:14:08,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:14:08,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708166679] [2024-10-15 15:14:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:14:08,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:14:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:08,769 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:14:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:08,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:14:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:08,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:08,958 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:09,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:09,075 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:09,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:09,176 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:09,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:09,257 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:09,304 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:09,332 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:09,358 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-10-15 15:14:09,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:14:09,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708166679] [2024-10-15 15:14:09,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708166679] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:14:09,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283999688] [2024-10-15 15:14:09,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 15:14:09,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:14:09,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:14:09,399 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:14:09,400 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-15 15:14:09,702 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-10-15 15:14:09,703 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:14:09,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-15 15:14:09,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:14:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-10-15 15:14:09,818 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:14:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-15 15:14:15,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283999688] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:14:15,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:14:15,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 32 [2024-10-15 15:14:15,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33429443] [2024-10-15 15:14:15,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:14:15,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-15 15:14:15,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:14:15,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-15 15:14:15,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2024-10-15 15:14:15,686 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2024-10-15 15:14:15,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:14:15,840 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-10-15 15:14:15,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 15:14:15,841 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) Word has length 79 [2024-10-15 15:14:15,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:14:15,841 INFO L225 Difference]: With dead ends: 55 [2024-10-15 15:14:15,842 INFO L226 Difference]: Without dead ends: 51 [2024-10-15 15:14:15,842 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 156 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=577, Invalid=1229, Unknown=0, NotChecked=0, Total=1806 [2024-10-15 15:14:15,843 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:14:15,843 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 161 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:14:15,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-15 15:14:15,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-10-15 15:14:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2024-10-15 15:14:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-10-15 15:14:15,850 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2024-10-15 15:14:15,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:14:15,850 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-10-15 15:14:15,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2024-10-15 15:14:15,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:14:15,851 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-10-15 15:14:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-10-15 15:14:15,852 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:14:15,852 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:14:15,868 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-15 15:14:16,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:14:16,057 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:14:16,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:14:16,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1968163843, now seen corresponding path program 12 times [2024-10-15 15:14:16,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:14:16,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434585794] [2024-10-15 15:14:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:14:16,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:14:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:14:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:14:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,262 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,341 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,414 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,478 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,537 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,635 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,750 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-10-15 15:14:16,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:14:16,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434585794] [2024-10-15 15:14:16,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434585794] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:14:16,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468182204] [2024-10-15 15:14:16,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 15:14:16,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:14:16,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:14:16,836 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:14:16,837 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-15 15:14:17,214 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-10-15 15:14:17,215 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:14:17,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-15 15:14:17,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:14:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-15 15:14:17,307 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:14:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-15 15:14:24,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468182204] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:14:24,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:14:24,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 34 [2024-10-15 15:14:24,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428685730] [2024-10-15 15:14:24,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:14:24,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-15 15:14:24,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:14:24,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-15 15:14:24,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 15:14:24,605 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2024-10-15 15:14:24,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:14:24,756 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-10-15 15:14:24,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 15:14:24,757 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) Word has length 85 [2024-10-15 15:14:24,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:14:24,758 INFO L225 Difference]: With dead ends: 58 [2024-10-15 15:14:24,758 INFO L226 Difference]: Without dead ends: 54 [2024-10-15 15:14:24,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 168 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 15:14:24,759 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:14:24,760 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 171 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:14:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-15 15:14:24,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-10-15 15:14:24,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2024-10-15 15:14:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-10-15 15:14:24,765 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2024-10-15 15:14:24,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:14:24,766 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-10-15 15:14:24,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2024-10-15 15:14:24,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:14:24,766 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-10-15 15:14:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-15 15:14:24,767 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:14:24,767 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:14:24,786 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-15 15:14:24,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-15 15:14:24,972 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:14:24,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:14:24,972 INFO L85 PathProgramCache]: Analyzing trace with hash 114960463, now seen corresponding path program 13 times [2024-10-15 15:14:24,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:14:24,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589906251] [2024-10-15 15:14:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:14:24,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:14:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,074 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:14:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,077 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:14:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,188 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,277 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,435 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,564 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,629 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,747 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,800 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-10-15 15:14:25,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:14:25,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589906251] [2024-10-15 15:14:25,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589906251] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:14:25,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522511803] [2024-10-15 15:14:25,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 15:14:25,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:14:25,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:14:25,858 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:14:25,859 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-15 15:14:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:26,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-15 15:14:26,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:14:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-10-15 15:14:26,418 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:14:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-15 15:14:35,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522511803] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:14:35,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:14:35,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 36 [2024-10-15 15:14:35,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605780599] [2024-10-15 15:14:35,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:14:35,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-15 15:14:35,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:14:35,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-15 15:14:35,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 15:14:35,798 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2024-10-15 15:14:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:14:35,944 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-10-15 15:14:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 15:14:35,944 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) Word has length 91 [2024-10-15 15:14:35,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:14:35,945 INFO L225 Difference]: With dead ends: 61 [2024-10-15 15:14:35,945 INFO L226 Difference]: Without dead ends: 57 [2024-10-15 15:14:35,946 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 180 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=755, Invalid=1597, Unknown=0, NotChecked=0, Total=2352 [2024-10-15 15:14:35,946 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:14:35,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 171 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:14:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-15 15:14:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-10-15 15:14:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2024-10-15 15:14:35,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-10-15 15:14:35,954 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2024-10-15 15:14:35,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:14:35,955 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-10-15 15:14:35,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2024-10-15 15:14:35,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:14:35,955 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-10-15 15:14:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-10-15 15:14:35,956 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:14:35,956 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:14:35,969 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-15 15:14:36,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-15 15:14:36,157 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:14:36,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:14:36,157 INFO L85 PathProgramCache]: Analyzing trace with hash -654525891, now seen corresponding path program 14 times [2024-10-15 15:14:36,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:14:36,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312231790] [2024-10-15 15:14:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:14:36,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:14:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:36,274 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:14:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:36,276 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:14:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:36,408 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:36,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:36,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:36,660 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:36,724 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:36,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:36,834 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:36,897 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:36,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:36,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:37,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:37,030 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:37,055 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:37,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-10-15 15:14:37,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:14:37,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312231790] [2024-10-15 15:14:37,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312231790] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:14:37,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121319220] [2024-10-15 15:14:37,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:14:37,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:14:37,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:14:37,119 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:14:37,120 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-15 15:14:37,626 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:14:37,626 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:14:37,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-15 15:14:37,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:14:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-10-15 15:14:37,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:14:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-10-15 15:14:49,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121319220] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:14:49,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:14:49,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2024-10-15 15:14:49,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185434882] [2024-10-15 15:14:49,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:14:49,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-15 15:14:49,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:14:49,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-15 15:14:49,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 15:14:49,103 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-10-15 15:14:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:14:49,281 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-10-15 15:14:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-15 15:14:49,282 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) Word has length 97 [2024-10-15 15:14:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:14:49,283 INFO L225 Difference]: With dead ends: 64 [2024-10-15 15:14:49,283 INFO L226 Difference]: Without dead ends: 60 [2024-10-15 15:14:49,284 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 192 SyntacticMatches, 15 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=853, Invalid=1799, Unknown=0, NotChecked=0, Total=2652 [2024-10-15 15:14:49,284 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:14:49,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 178 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:14:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-15 15:14:49,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-10-15 15:14:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 4 states have call successors, (4), 3 states have call predecessors, (4), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2024-10-15 15:14:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-10-15 15:14:49,291 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2024-10-15 15:14:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:14:49,291 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-10-15 15:14:49,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-10-15 15:14:49,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:14:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-10-15 15:14:49,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-10-15 15:14:49,293 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:14:49,293 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:14:49,312 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-15 15:14:49,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-15 15:14:49,494 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:14:49,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:14:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash -488711921, now seen corresponding path program 15 times [2024-10-15 15:14:49,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:14:49,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89977321] [2024-10-15 15:14:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:14:49,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:14:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:49,608 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:14:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:49,610 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:14:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:49,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:49,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:49,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:50,031 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:50,104 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:50,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:50,242 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:50,300 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:50,350 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:50,388 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:50,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:50,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:50,481 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:50,505 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:50,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:14:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:14:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-10-15 15:14:50,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:14:50,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89977321] [2024-10-15 15:14:50,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89977321] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:14:50,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204926945] [2024-10-15 15:14:50,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 15:14:50,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:14:50,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:14:50,563 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:14:50,564 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-15 15:14:51,291 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-10-15 15:14:51,291 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:14:51,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-15 15:14:51,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:14:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-10-15 15:14:51,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:15:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-10-15 15:15:05,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204926945] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:15:05,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:15:05,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 35] total 40 [2024-10-15 15:15:05,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288343587] [2024-10-15 15:15:05,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:15:05,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-15 15:15:05,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:15:05,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-15 15:15:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 15:15:05,640 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2024-10-15 15:15:05,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:15:05,862 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-10-15 15:15:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-15 15:15:05,862 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) Word has length 103 [2024-10-15 15:15:05,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:15:05,863 INFO L225 Difference]: With dead ends: 67 [2024-10-15 15:15:05,864 INFO L226 Difference]: Without dead ends: 63 [2024-10-15 15:15:05,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 204 SyntacticMatches, 16 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=957, Invalid=2013, Unknown=0, NotChecked=0, Total=2970 [2024-10-15 15:15:05,865 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 225 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:15:05,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 211 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:15:05,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-15 15:15:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-10-15 15:15:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 4 states have call successors, (4), 3 states have call predecessors, (4), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2024-10-15 15:15:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-10-15 15:15:05,878 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2024-10-15 15:15:05,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:15:05,879 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-10-15 15:15:05,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2024-10-15 15:15:05,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:15:05,879 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-10-15 15:15:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-10-15 15:15:05,880 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:15:05,880 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:15:05,902 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-15 15:15:06,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-15 15:15:06,081 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:15:06,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:15:06,081 INFO L85 PathProgramCache]: Analyzing trace with hash -763891587, now seen corresponding path program 16 times [2024-10-15 15:15:06,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:15:06,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266867901] [2024-10-15 15:15:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:15:06,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:15:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:06,209 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:15:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:06,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:15:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:06,328 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:06,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:06,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:06,656 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:06,742 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:06,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:06,876 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:06,936 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:06,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:07,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:07,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:07,122 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:07,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:07,181 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:07,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:07,229 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-10-15 15:15:07,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:15:07,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266867901] [2024-10-15 15:15:07,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266867901] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:15:07,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846903031] [2024-10-15 15:15:07,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 15:15:07,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:15:07,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:15:07,268 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:15:07,269 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-15 15:15:08,117 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 15:15:08,117 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:15:08,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-15 15:15:08,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:15:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-10-15 15:15:08,235 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:15:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-10-15 15:15:25,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846903031] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:15:25,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:15:25,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 37] total 42 [2024-10-15 15:15:25,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092433033] [2024-10-15 15:15:25,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:15:25,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-15 15:15:25,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:15:25,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-15 15:15:25,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 15:15:25,624 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2024-10-15 15:15:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:15:25,838 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2024-10-15 15:15:25,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 15:15:25,838 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) Word has length 109 [2024-10-15 15:15:25,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:15:25,839 INFO L225 Difference]: With dead ends: 70 [2024-10-15 15:15:25,839 INFO L226 Difference]: Without dead ends: 66 [2024-10-15 15:15:25,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 216 SyntacticMatches, 17 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1067, Invalid=2239, Unknown=0, NotChecked=0, Total=3306 [2024-10-15 15:15:25,841 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 118 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:15:25,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 190 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:15:25,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-15 15:15:25,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-10-15 15:15:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2024-10-15 15:15:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2024-10-15 15:15:25,849 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2024-10-15 15:15:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:15:25,849 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2024-10-15 15:15:25,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2024-10-15 15:15:25,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:15:25,850 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2024-10-15 15:15:25,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-10-15 15:15:25,851 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:15:25,851 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:15:25,874 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-15 15:15:26,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:15:26,056 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:15:26,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:15:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1440720433, now seen corresponding path program 17 times [2024-10-15 15:15:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:15:26,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359595464] [2024-10-15 15:15:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:15:26,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:15:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:26,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:15:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:26,203 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:15:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:26,334 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:26,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:26,600 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:26,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:26,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:26,889 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:26,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:27,029 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:27,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:27,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:27,193 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:27,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:27,270 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:27,305 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:27,334 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:27,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:27,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-10-15 15:15:27,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:15:27,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359595464] [2024-10-15 15:15:27,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359595464] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:15:27,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405302738] [2024-10-15 15:15:27,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 15:15:27,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:15:27,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:15:27,440 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:15:27,441 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-15 15:15:28,436 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-10-15 15:15:28,436 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:15:28,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-15 15:15:28,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:15:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-10-15 15:15:28,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:15:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-15 15:15:49,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405302738] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:15:49,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:15:49,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 39] total 44 [2024-10-15 15:15:49,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594645343] [2024-10-15 15:15:49,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:15:49,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-15 15:15:49,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:15:49,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-15 15:15:49,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 15:15:49,586 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2024-10-15 15:15:49,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:15:49,848 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2024-10-15 15:15:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-15 15:15:49,849 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) Word has length 115 [2024-10-15 15:15:49,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:15:49,851 INFO L225 Difference]: With dead ends: 73 [2024-10-15 15:15:49,851 INFO L226 Difference]: Without dead ends: 69 [2024-10-15 15:15:49,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 228 SyntacticMatches, 18 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1183, Invalid=2477, Unknown=0, NotChecked=0, Total=3660 [2024-10-15 15:15:49,853 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 218 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:15:49,853 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 192 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:15:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-15 15:15:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-10-15 15:15:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2024-10-15 15:15:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-10-15 15:15:49,865 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2024-10-15 15:15:49,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:15:49,865 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-10-15 15:15:49,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2024-10-15 15:15:49,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:15:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-10-15 15:15:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-10-15 15:15:49,867 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:15:49,867 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:15:49,892 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-15 15:15:50,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-15 15:15:50,068 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:15:50,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:15:50,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1110583619, now seen corresponding path program 18 times [2024-10-15 15:15:50,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:15:50,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174017049] [2024-10-15 15:15:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:15:50,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:15:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:50,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:15:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:50,187 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:15:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:50,321 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:50,441 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:50,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:50,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:50,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:50,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:50,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:51,027 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:51,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:51,140 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:51,188 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:51,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:51,255 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:51,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:51,306 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:51,329 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:51,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:51,378 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:15:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:15:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-10-15 15:15:51,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:15:51,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174017049] [2024-10-15 15:15:51,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174017049] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:15:51,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97882073] [2024-10-15 15:15:51,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 15:15:51,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:15:51,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:15:51,409 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:15:51,410 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-15 15:15:52,626 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-10-15 15:15:52,626 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:15:52,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-15 15:15:52,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:15:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-10-15 15:15:52,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:16:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-10-15 15:16:18,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97882073] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:16:18,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:16:18,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 41] total 46 [2024-10-15 15:16:18,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143395109] [2024-10-15 15:16:18,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:16:18,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-15 15:16:18,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:16:18,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-15 15:16:18,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 15:16:18,021 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2024-10-15 15:16:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:16:18,240 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2024-10-15 15:16:18,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 15:16:18,241 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) Word has length 121 [2024-10-15 15:16:18,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:16:18,242 INFO L225 Difference]: With dead ends: 76 [2024-10-15 15:16:18,242 INFO L226 Difference]: Without dead ends: 72 [2024-10-15 15:16:18,243 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 240 SyntacticMatches, 19 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2727, Unknown=0, NotChecked=0, Total=4032 [2024-10-15 15:16:18,244 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 131 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:16:18,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 210 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:16:18,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-15 15:16:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-10-15 15:16:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 21 states have return successors, (22), 21 states have call predecessors, (22), 3 states have call successors, (22) [2024-10-15 15:16:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-10-15 15:16:18,250 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2024-10-15 15:16:18,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:16:18,251 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-10-15 15:16:18,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2024-10-15 15:16:18,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:16:18,251 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-10-15 15:16:18,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-10-15 15:16:18,252 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:16:18,252 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:16:18,276 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-15 15:16:18,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:16:18,453 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:16:18,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:16:18,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1808618865, now seen corresponding path program 19 times [2024-10-15 15:16:18,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:16:18,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779408606] [2024-10-15 15:16:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:16:18,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:16:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:18,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:16:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:18,649 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:16:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:18,767 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:18,877 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:18,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,131 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,202 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,264 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,352 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,489 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,525 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,608 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,635 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,660 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,688 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,733 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-10-15 15:16:19,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:16:19,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779408606] [2024-10-15 15:16:19,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779408606] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:16:19,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235877688] [2024-10-15 15:16:19,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 15:16:19,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:16:19,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:16:19,765 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:16:19,766 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-15 15:16:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:21,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-15 15:16:21,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:16:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-10-15 15:16:21,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:16:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-10-15 15:16:51,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235877688] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:16:51,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:16:51,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 43] total 48 [2024-10-15 15:16:51,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095144023] [2024-10-15 15:16:51,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:16:51,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-15 15:16:51,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:16:51,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-15 15:16:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=1659, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 15:16:51,298 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 48 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 48 states have internal predecessors, (93), 24 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) [2024-10-15 15:16:51,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:16:51,544 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2024-10-15 15:16:51,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-15 15:16:51,545 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 48 states have internal predecessors, (93), 24 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) Word has length 127 [2024-10-15 15:16:51,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:16:51,546 INFO L225 Difference]: With dead ends: 79 [2024-10-15 15:16:51,546 INFO L226 Difference]: Without dead ends: 75 [2024-10-15 15:16:51,548 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 252 SyntacticMatches, 20 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1433, Invalid=2989, Unknown=0, NotChecked=0, Total=4422 [2024-10-15 15:16:51,548 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 167 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:16:51,549 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 234 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:16:51,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-15 15:16:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-10-15 15:16:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 22 states have return successors, (23), 22 states have call predecessors, (23), 3 states have call successors, (23) [2024-10-15 15:16:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2024-10-15 15:16:51,555 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2024-10-15 15:16:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:16:51,555 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2024-10-15 15:16:51,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 48 states have internal predecessors, (93), 24 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) [2024-10-15 15:16:51,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:16:51,556 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2024-10-15 15:16:51,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-10-15 15:16:51,557 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:16:51,557 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:16:51,578 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-15 15:16:51,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:16:51,758 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:16:51,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:16:51,758 INFO L85 PathProgramCache]: Analyzing trace with hash 145386749, now seen corresponding path program 20 times [2024-10-15 15:16:51,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:16:51,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145530021] [2024-10-15 15:16:51,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:16:51,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:16:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:51,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:16:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:51,892 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:16:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:52,042 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:52,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:52,254 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:52,355 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:52,437 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:52,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:52,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:52,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:52,768 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:52,819 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:52,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:52,918 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:52,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:53,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:53,057 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:53,097 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:53,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:53,160 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:53,181 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:53,203 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:16:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:16:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2024-10-15 15:16:53,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:16:53,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145530021] [2024-10-15 15:16:53,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145530021] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:16:53,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514778800] [2024-10-15 15:16:53,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:16:53,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:16:53,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:16:53,237 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:16:53,238 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-15 15:16:55,034 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:16:55,034 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:16:55,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-15 15:16:55,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:16:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-10-15 15:16:55,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:17:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-10-15 15:17:30,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514778800] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:17:30,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:17:30,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 45] total 50 [2024-10-15 15:17:30,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323884061] [2024-10-15 15:17:30,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:17:30,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-15 15:17:30,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:17:30,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-15 15:17:30,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=1803, Unknown=0, NotChecked=0, Total=2450 [2024-10-15 15:17:30,773 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 50 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 50 states have internal predecessors, (97), 25 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) [2024-10-15 15:17:31,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:17:31,012 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2024-10-15 15:17:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-15 15:17:31,012 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 50 states have internal predecessors, (97), 25 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) Word has length 133 [2024-10-15 15:17:31,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:17:31,013 INFO L225 Difference]: With dead ends: 82 [2024-10-15 15:17:31,013 INFO L226 Difference]: Without dead ends: 78 [2024-10-15 15:17:31,015 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 264 SyntacticMatches, 21 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1567, Invalid=3263, Unknown=0, NotChecked=0, Total=4830 [2024-10-15 15:17:31,015 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:17:31,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 243 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:17:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-15 15:17:31,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-10-15 15:17:31,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 23 states have return successors, (24), 23 states have call predecessors, (24), 3 states have call successors, (24) [2024-10-15 15:17:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2024-10-15 15:17:31,056 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2024-10-15 15:17:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:17:31,056 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2024-10-15 15:17:31,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 50 states have internal predecessors, (97), 25 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) [2024-10-15 15:17:31,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:17:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2024-10-15 15:17:31,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-10-15 15:17:31,057 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:17:31,057 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:17:31,076 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-15 15:17:31,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-15 15:17:31,258 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:17:31,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:17:31,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1314272433, now seen corresponding path program 21 times [2024-10-15 15:17:31,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:17:31,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31077996] [2024-10-15 15:17:31,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:17:31,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:17:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:31,403 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:17:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:31,404 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:17:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:31,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:31,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:31,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:31,885 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,190 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,270 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,405 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,515 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,606 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,692 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,754 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,780 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,813 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,835 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:17:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:17:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2024-10-15 15:17:32,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:17:32,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31077996] [2024-10-15 15:17:32,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31077996] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:17:32,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105446079] [2024-10-15 15:17:32,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 15:17:32,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:17:32,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:17:32,890 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:17:32,893 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-15 15:17:35,057 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-10-15 15:17:35,057 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:17:35,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-15 15:17:35,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:17:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-10-15 15:17:35,191 INFO L311 TraceCheckSpWp]: Computing backward predicates...