./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/vnew1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/vnew1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 18:28:08,467 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 18:28:08,528 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 18:28:08,535 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 18:28:08,536 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 18:28:08,565 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 18:28:08,566 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 18:28:08,567 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 18:28:08,568 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 18:28:08,569 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 18:28:08,570 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 18:28:08,570 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 18:28:08,571 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 18:28:08,574 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 18:28:08,575 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 18:28:08,575 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 18:28:08,575 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 18:28:08,575 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 18:28:08,576 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 18:28:08,576 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 18:28:08,576 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 18:28:08,577 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 18:28:08,577 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 18:28:08,577 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 18:28:08,577 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 18:28:08,578 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 18:28:08,578 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 18:28:08,578 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 18:28:08,579 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 18:28:08,579 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 18:28:08,579 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 18:28:08,579 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 18:28:08,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:28:08,580 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 18:28:08,580 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 18:28:08,580 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 18:28:08,580 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 18:28:08,581 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 18:28:08,581 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 18:28:08,581 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 18:28:08,581 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 18:28:08,583 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 18:28:08,583 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 18:28:08,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 18:28:08,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 18:28:08,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 18:28:08,892 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 18:28:08,893 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 18:28:08,894 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/vnew1.c [2024-09-17 18:28:10,284 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 18:28:10,548 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 18:28:10,549 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/vnew1.c [2024-09-17 18:28:10,559 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b5abe5a03/d617c0c8cfb5486686a2c778dc2c0e7a/FLAGab2f7396f [2024-09-17 18:28:10,859 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b5abe5a03/d617c0c8cfb5486686a2c778dc2c0e7a [2024-09-17 18:28:10,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 18:28:10,863 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 18:28:10,864 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 18:28:10,864 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 18:28:10,871 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 18:28:10,874 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:28:10" (1/1) ... [2024-09-17 18:28:10,875 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d080f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:10, skipping insertion in model container [2024-09-17 18:28:10,875 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:28:10" (1/1) ... [2024-09-17 18:28:10,892 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 18:28:11,041 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2024-09-17 18:28:11,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:28:11,061 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 18:28:11,073 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2024-09-17 18:28:11,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:28:11,091 INFO L204 MainTranslator]: Completed translation [2024-09-17 18:28:11,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:11 WrapperNode [2024-09-17 18:28:11,092 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 18:28:11,093 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 18:28:11,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 18:28:11,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 18:28:11,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:11" (1/1) ... [2024-09-17 18:28:11,104 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:11" (1/1) ... [2024-09-17 18:28:11,108 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 18:28:11,109 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 18:28:11,109 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 18:28:11,109 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 18:28:11,109 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 18:28:11,117 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:11" (1/1) ... [2024-09-17 18:28:11,117 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:11" (1/1) ... [2024-09-17 18:28:11,118 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:11" (1/1) ... [2024-09-17 18:28:11,128 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-09-17 18:28:11,129 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:11" (1/1) ... [2024-09-17 18:28:11,129 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:11" (1/1) ... [2024-09-17 18:28:11,131 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:11" (1/1) ... [2024-09-17 18:28:11,138 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:11" (1/1) ... [2024-09-17 18:28:11,139 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:11" (1/1) ... [2024-09-17 18:28:11,140 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:11" (1/1) ... [2024-09-17 18:28:11,141 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 18:28:11,142 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 18:28:11,142 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 18:28:11,142 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 18:28:11,143 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:11" (1/1) ... [2024-09-17 18:28:11,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:28:11,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:28:11,173 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-17 18:28:11,175 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-17 18:28:11,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 18:28:11,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 18:28:11,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 18:28:11,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 18:28:11,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-17 18:28:11,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 18:28:11,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 18:28:11,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 18:28:11,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 18:28:11,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 18:28:11,219 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 18:28:11,270 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 18:28:11,271 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 18:28:11,404 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-17 18:28:11,404 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 18:28:11,435 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 18:28:11,435 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-17 18:28:11,436 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:28:11 BoogieIcfgContainer [2024-09-17 18:28:11,436 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 18:28:11,439 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 18:28:11,439 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 18:28:11,442 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 18:28:11,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 06:28:10" (1/3) ... [2024-09-17 18:28:11,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607a0b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:28:11, skipping insertion in model container [2024-09-17 18:28:11,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:28:11" (2/3) ... [2024-09-17 18:28:11,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607a0b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:28:11, skipping insertion in model container [2024-09-17 18:28:11,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:28:11" (3/3) ... [2024-09-17 18:28:11,444 INFO L112 eAbstractionObserver]: Analyzing ICFG vnew1.c [2024-09-17 18:28:11,457 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 18:28:11,457 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 18:28:11,504 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 18:28:11,510 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@159e86cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 18:28:11,510 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 18:28:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 18:28:11,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-17 18:28:11,519 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:28:11,520 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:28:11,520 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:28:11,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:28:11,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1892212544, now seen corresponding path program 1 times [2024-09-17 18:28:11,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:28:11,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373495544] [2024-09-17 18:28:11,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:28:11,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:28:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:12,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:28:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:28:12,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:28:12,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373495544] [2024-09-17 18:28:12,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373495544] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:28:12,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:28:12,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-17 18:28:12,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325101898] [2024-09-17 18:28:12,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:28:12,252 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-17 18:28:12,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:28:12,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-17 18:28:12,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-17 18:28:12,278 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:28:12,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:28:12,618 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-09-17 18:28:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-17 18:28:12,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-17 18:28:12,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:28:12,626 INFO L225 Difference]: With dead ends: 46 [2024-09-17 18:28:12,626 INFO L226 Difference]: Without dead ends: 26 [2024-09-17 18:28:12,630 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-09-17 18:28:12,634 INFO L434 NwaCegarLoop]: 4 mSDtfsCounter, 57 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:28:12,636 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 27 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:28:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-17 18:28:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-09-17 18:28:12,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 18:28:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2024-09-17 18:28:12,675 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2024-09-17 18:28:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:28:12,676 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2024-09-17 18:28:12,676 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:28:12,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:28:12,679 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2024-09-17 18:28:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-17 18:28:12,679 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:28:12,679 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:28:12,679 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 18:28:12,680 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:28:12,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:28:12,680 INFO L85 PathProgramCache]: Analyzing trace with hash 706153222, now seen corresponding path program 1 times [2024-09-17 18:28:12,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:28:12,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816382435] [2024-09-17 18:28:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:28:12,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:28:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:13,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:28:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:28:13,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:28:13,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816382435] [2024-09-17 18:28:13,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816382435] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:28:13,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895348468] [2024-09-17 18:28:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:28:13,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:28:13,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:28:13,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:28:13,123 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 18:28:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:13,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-17 18:28:13,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:28:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:28:13,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:28:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:28:13,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895348468] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:28:13,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:28:13,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2024-09-17 18:28:13,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647003976] [2024-09-17 18:28:13,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:28:13,826 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:28:13,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:28:13,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:28:13,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:28:13,829 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 18:28:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:28:14,546 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-09-17 18:28:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 18:28:14,547 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-09-17 18:28:14,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:28:14,549 INFO L225 Difference]: With dead ends: 50 [2024-09-17 18:28:14,549 INFO L226 Difference]: Without dead ends: 48 [2024-09-17 18:28:14,551 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2024-09-17 18:28:14,552 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 90 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:28:14,552 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 25 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:28:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-17 18:28:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2024-09-17 18:28:14,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-17 18:28:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2024-09-17 18:28:14,577 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 14 [2024-09-17 18:28:14,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:28:14,577 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2024-09-17 18:28:14,578 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 18:28:14,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:28:14,579 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2024-09-17 18:28:14,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-17 18:28:14,581 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:28:14,581 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:28:14,600 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-17 18:28:14,785 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:28:14,786 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:28:14,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:28:14,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1759027392, now seen corresponding path program 2 times [2024-09-17 18:28:14,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:28:14,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743556625] [2024-09-17 18:28:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:28:14,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:28:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:15,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:28:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:28:15,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:28:15,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743556625] [2024-09-17 18:28:15,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743556625] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:28:15,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571941848] [2024-09-17 18:28:15,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:28:15,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:28:15,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:28:15,172 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:28:15,174 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 18:28:15,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:28:15,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:28:15,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:28:15,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:28:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:28:15,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:28:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:28:15,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571941848] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:28:15,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:28:15,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-09-17 18:28:15,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614133853] [2024-09-17 18:28:15,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:28:15,813 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-17 18:28:15,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:28:15,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-17 18:28:15,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2024-09-17 18:28:15,815 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 18:28:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:28:17,420 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2024-09-17 18:28:17,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:28:17,420 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-17 18:28:17,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:28:17,423 INFO L225 Difference]: With dead ends: 82 [2024-09-17 18:28:17,423 INFO L226 Difference]: Without dead ends: 80 [2024-09-17 18:28:17,424 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=373, Invalid=1607, Unknown=0, NotChecked=0, Total=1980 [2024-09-17 18:28:17,425 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 154 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:28:17,426 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 28 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-17 18:28:17,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-17 18:28:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2024-09-17 18:28:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 38 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-17 18:28:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2024-09-17 18:28:17,467 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 17 [2024-09-17 18:28:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:28:17,467 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2024-09-17 18:28:17,468 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 18:28:17,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:28:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2024-09-17 18:28:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-17 18:28:17,469 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:28:17,469 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:28:17,486 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 18:28:17,673 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:28:17,674 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:28:17,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:28:17,674 INFO L85 PathProgramCache]: Analyzing trace with hash 447679010, now seen corresponding path program 1 times [2024-09-17 18:28:17,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:28:17,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884702084] [2024-09-17 18:28:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:28:17,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:28:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:18,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:28:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:18,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-17 18:28:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:28:18,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:28:18,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884702084] [2024-09-17 18:28:18,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884702084] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:28:18,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526460193] [2024-09-17 18:28:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:28:18,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:28:18,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:28:18,043 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:28:18,045 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 18:28:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:18,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-17 18:28:18,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:28:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:28:18,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:28:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:28:18,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526460193] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:28:18,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:28:18,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 23 [2024-09-17 18:28:18,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064000392] [2024-09-17 18:28:18,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:28:18,527 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-17 18:28:18,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:28:18,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-17 18:28:18,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-09-17 18:28:18,528 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 20 states have internal predecessors, (38), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-17 18:28:20,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:28:20,567 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2024-09-17 18:28:20,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 18:28:20,568 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 20 states have internal predecessors, (38), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 23 [2024-09-17 18:28:20,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:28:20,570 INFO L225 Difference]: With dead ends: 93 [2024-09-17 18:28:20,570 INFO L226 Difference]: Without dead ends: 91 [2024-09-17 18:28:20,570 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 18:28:20,572 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 102 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:28:20,574 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 41 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-17 18:28:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-09-17 18:28:20,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2024-09-17 18:28:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 71 states have internal predecessors, (79), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 10 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:28:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2024-09-17 18:28:20,622 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 23 [2024-09-17 18:28:20,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:28:20,623 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2024-09-17 18:28:20,623 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 20 states have internal predecessors, (38), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-17 18:28:20,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:28:20,624 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2024-09-17 18:28:20,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-17 18:28:20,625 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:28:20,625 INFO L216 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:28:20,642 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 18:28:20,826 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:28:20,826 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:28:20,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:28:20,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1692277824, now seen corresponding path program 3 times [2024-09-17 18:28:20,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:28:20,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529692951] [2024-09-17 18:28:20,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:28:20,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:28:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:21,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:28:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:28:21,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:28:21,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529692951] [2024-09-17 18:28:21,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529692951] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:28:21,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089844783] [2024-09-17 18:28:21,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:28:21,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:28:21,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:28:21,502 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:28:21,517 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 18:28:21,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-17 18:28:21,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:28:21,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-17 18:28:21,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:28:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:28:22,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:28:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:28:22,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089844783] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:28:22,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:28:22,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 48 [2024-09-17 18:28:22,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167461599] [2024-09-17 18:28:22,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:28:22,957 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-17 18:28:22,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:28:22,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-17 18:28:22,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1880, Unknown=0, NotChecked=0, Total=2256 [2024-09-17 18:28:22,960 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 18:28:34,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:28:43,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:28:44,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:28:44,210 INFO L93 Difference]: Finished difference Result 151 states and 195 transitions. [2024-09-17 18:28:44,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-17 18:28:44,211 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-09-17 18:28:44,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:28:44,213 INFO L225 Difference]: With dead ends: 151 [2024-09-17 18:28:44,213 INFO L226 Difference]: Without dead ends: 149 [2024-09-17 18:28:44,216 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=1319, Invalid=5821, Unknown=0, NotChecked=0, Total=7140 [2024-09-17 18:28:44,218 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 384 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 173 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:28:44,218 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 76 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1459 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2024-09-17 18:28:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-17 18:28:44,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 126. [2024-09-17 18:28:44,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 96 states have (on average 1.3020833333333333) internal successors, (125), 105 states have internal predecessors, (125), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (20), 11 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:28:44,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2024-09-17 18:28:44,297 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 25 [2024-09-17 18:28:44,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:28:44,298 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2024-09-17 18:28:44,298 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 18:28:44,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:28:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2024-09-17 18:28:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-17 18:28:44,300 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:28:44,300 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:28:44,313 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-17 18:28:44,500 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:28:44,501 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:28:44,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:28:44,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1835559814, now seen corresponding path program 2 times [2024-09-17 18:28:44,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:28:44,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691640372] [2024-09-17 18:28:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:28:44,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:28:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:44,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:28:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:44,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:28:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:44,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 18:28:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:28:44,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:28:44,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691640372] [2024-09-17 18:28:44,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691640372] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:28:44,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412718058] [2024-09-17 18:28:44,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:28:44,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:28:44,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:28:44,819 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:28:44,820 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 18:28:44,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:28:44,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:28:44,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 18:28:44,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:28:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:28:44,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:28:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:28:45,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412718058] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:28:45,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:28:45,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2024-09-17 18:28:45,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233917688] [2024-09-17 18:28:45,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:28:45,337 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 18:28:45,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:28:45,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 18:28:45,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-09-17 18:28:45,339 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:28:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:28:45,823 INFO L93 Difference]: Finished difference Result 161 states and 204 transitions. [2024-09-17 18:28:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 18:28:45,823 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 28 [2024-09-17 18:28:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:28:45,824 INFO L225 Difference]: With dead ends: 161 [2024-09-17 18:28:45,824 INFO L226 Difference]: Without dead ends: 118 [2024-09-17 18:28:45,825 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 18:28:45,826 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:28:45,826 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 31 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:28:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-17 18:28:45,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-09-17 18:28:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 90 states have (on average 1.288888888888889) internal successors, (116), 98 states have internal predecessors, (116), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (19), 11 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-17 18:28:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 155 transitions. [2024-09-17 18:28:45,890 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 155 transitions. Word has length 28 [2024-09-17 18:28:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:28:45,890 INFO L474 AbstractCegarLoop]: Abstraction has 118 states and 155 transitions. [2024-09-17 18:28:45,890 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:28:45,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:28:45,891 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 155 transitions. [2024-09-17 18:28:45,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-17 18:28:45,893 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:28:45,893 INFO L216 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:28:45,907 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 18:28:46,093 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-17 18:28:46,094 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:28:46,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:28:46,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2066924416, now seen corresponding path program 3 times [2024-09-17 18:28:46,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:28:46,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202175312] [2024-09-17 18:28:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:28:46,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:28:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:47,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:28:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:47,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:28:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:47,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:28:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:28:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:28:47,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:28:47,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202175312] [2024-09-17 18:28:47,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202175312] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:28:47,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971431199] [2024-09-17 18:28:47,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:28:47,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:28:47,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:28:47,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:28:47,106 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 18:28:47,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 18:28:47,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:28:47,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-17 18:28:47,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:28:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:28:47,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:29:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:29:06,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971431199] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:29:06,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:29:06,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 13] total 37 [2024-09-17 18:29:06,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406673974] [2024-09-17 18:29:06,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:29:06,284 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-17 18:29:06,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:29:06,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-17 18:29:06,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1151, Unknown=2, NotChecked=0, Total=1332 [2024-09-17 18:29:06,285 INFO L87 Difference]: Start difference. First operand 118 states and 155 transitions. Second operand has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-17 18:29:10,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:29:21,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:29:22,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:29:22,340 INFO L93 Difference]: Finished difference Result 172 states and 219 transitions. [2024-09-17 18:29:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-17 18:29:22,341 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 33 [2024-09-17 18:29:22,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:29:22,342 INFO L225 Difference]: With dead ends: 172 [2024-09-17 18:29:22,342 INFO L226 Difference]: Without dead ends: 170 [2024-09-17 18:29:22,343 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=584, Invalid=3073, Unknown=3, NotChecked=0, Total=3660 [2024-09-17 18:29:22,344 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 169 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 80 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:29:22,344 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 44 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 524 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2024-09-17 18:29:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-09-17 18:29:22,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2024-09-17 18:29:22,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 125 states have (on average 1.208) internal successors, (151), 136 states have internal predecessors, (151), 33 states have call successors, (33), 11 states have call predecessors, (33), 10 states have return successors, (32), 21 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-17 18:29:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 216 transitions. [2024-09-17 18:29:22,416 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 216 transitions. Word has length 33 [2024-09-17 18:29:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:29:22,416 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 216 transitions. [2024-09-17 18:29:22,416 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-17 18:29:22,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:29:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 216 transitions. [2024-09-17 18:29:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-17 18:29:22,418 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:29:22,419 INFO L216 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:29:22,434 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-17 18:29:22,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:29:22,623 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:29:22,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:29:22,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2049998720, now seen corresponding path program 4 times [2024-09-17 18:29:22,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:29:22,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272873479] [2024-09-17 18:29:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:29:22,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:29:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:23,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:29:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:23,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:29:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:23,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:29:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:29:23,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:29:23,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272873479] [2024-09-17 18:29:23,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272873479] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:29:23,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087510222] [2024-09-17 18:29:23,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:29:23,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:29:23,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:29:23,901 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:29:23,902 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 18:29:24,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:29:24,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:29:24,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-17 18:29:24,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:29:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:29:24,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:29:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:29:26,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087510222] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:29:26,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:29:26,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 60 [2024-09-17 18:29:26,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784932505] [2024-09-17 18:29:26,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:29:26,165 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-17 18:29:26,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:29:26,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-17 18:29:26,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=3000, Unknown=0, NotChecked=0, Total=3540 [2024-09-17 18:29:26,167 INFO L87 Difference]: Start difference. First operand 169 states and 216 transitions. Second operand has 60 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 57 states have internal predecessors, (78), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-17 18:29:33,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:29:33,305 INFO L93 Difference]: Finished difference Result 224 states and 282 transitions. [2024-09-17 18:29:33,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-17 18:29:33,307 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 57 states have internal predecessors, (78), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2024-09-17 18:29:33,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:29:33,311 INFO L225 Difference]: With dead ends: 224 [2024-09-17 18:29:33,311 INFO L226 Difference]: Without dead ends: 222 [2024-09-17 18:29:33,312 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1321, Invalid=6689, Unknown=0, NotChecked=0, Total=8010 [2024-09-17 18:29:33,313 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 220 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:29:33,313 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 77 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-17 18:29:33,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-17 18:29:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 212. [2024-09-17 18:29:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 153 states have (on average 1.1699346405228759) internal successors, (179), 168 states have internal predecessors, (179), 46 states have call successors, (46), 13 states have call predecessors, (46), 12 states have return successors, (45), 30 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-17 18:29:33,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2024-09-17 18:29:33,422 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 41 [2024-09-17 18:29:33,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:29:33,422 INFO L474 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2024-09-17 18:29:33,422 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 57 states have internal predecessors, (78), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-17 18:29:33,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:29:33,423 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2024-09-17 18:29:33,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-17 18:29:33,424 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:29:33,425 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:29:33,441 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-17 18:29:33,625 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:29:33,625 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:29:33,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:29:33,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1054157638, now seen corresponding path program 5 times [2024-09-17 18:29:33,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:29:33,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165532896] [2024-09-17 18:29:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:29:33,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:29:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:34,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:29:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:34,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-17 18:29:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:34,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-17 18:29:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:34,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:29:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:34,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:29:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:29:34,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:29:34,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165532896] [2024-09-17 18:29:34,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165532896] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:29:34,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109285914] [2024-09-17 18:29:34,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:29:34,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:29:34,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:29:34,259 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:29:34,260 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 18:29:34,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-17 18:29:34,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:29:34,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:29:34,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:29:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:29:34,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:29:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:29:35,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109285914] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:29:35,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:29:35,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 38 [2024-09-17 18:29:35,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298441809] [2024-09-17 18:29:35,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:29:35,737 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-17 18:29:35,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:29:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-17 18:29:35,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 18:29:35,738 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 17 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-17 18:29:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:29:43,111 INFO L93 Difference]: Finished difference Result 253 states and 315 transitions. [2024-09-17 18:29:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-17 18:29:43,112 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 17 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 44 [2024-09-17 18:29:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:29:43,113 INFO L225 Difference]: With dead ends: 253 [2024-09-17 18:29:43,113 INFO L226 Difference]: Without dead ends: 224 [2024-09-17 18:29:43,115 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=662, Invalid=3628, Unknown=0, NotChecked=0, Total=4290 [2024-09-17 18:29:43,115 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 173 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:29:43,115 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 82 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-17 18:29:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-09-17 18:29:43,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2024-09-17 18:29:43,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 160 states have (on average 1.15625) internal successors, (185), 174 states have internal predecessors, (185), 48 states have call successors, (48), 14 states have call predecessors, (48), 13 states have return successors, (47), 33 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-17 18:29:43,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 280 transitions. [2024-09-17 18:29:43,210 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 280 transitions. Word has length 44 [2024-09-17 18:29:43,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:29:43,210 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 280 transitions. [2024-09-17 18:29:43,210 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 17 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-17 18:29:43,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:29:43,210 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 280 transitions. [2024-09-17 18:29:43,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-17 18:29:43,212 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:29:43,212 INFO L216 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:29:43,225 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-17 18:29:43,412 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:29:43,413 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:29:43,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:29:43,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1495655394, now seen corresponding path program 6 times [2024-09-17 18:29:43,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:29:43,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277355637] [2024-09-17 18:29:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:29:43,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:29:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:44,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:29:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:44,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-17 18:29:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:44,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:29:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:44,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:29:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:29:44,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:29:44,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277355637] [2024-09-17 18:29:44,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277355637] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:29:44,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111817639] [2024-09-17 18:29:44,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:29:44,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:29:44,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:29:44,154 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:29:44,156 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 18:29:44,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-17 18:29:44,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:29:44,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-17 18:29:44,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:29:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 18:29:44,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:29:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:29:45,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111817639] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:29:45,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:29:45,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 17] total 49 [2024-09-17 18:29:45,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125904409] [2024-09-17 18:29:45,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:29:45,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-17 18:29:45,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:29:45,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-17 18:29:45,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1994, Unknown=0, NotChecked=0, Total=2352 [2024-09-17 18:29:45,576 INFO L87 Difference]: Start difference. First operand 222 states and 280 transitions. Second operand has 49 states, 48 states have (on average 1.5) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-17 18:29:48,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:29:48,765 INFO L93 Difference]: Finished difference Result 256 states and 320 transitions. [2024-09-17 18:29:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-17 18:29:48,766 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.5) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 43 [2024-09-17 18:29:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:29:48,768 INFO L225 Difference]: With dead ends: 256 [2024-09-17 18:29:48,768 INFO L226 Difference]: Without dead ends: 254 [2024-09-17 18:29:48,770 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=894, Invalid=4656, Unknown=0, NotChecked=0, Total=5550 [2024-09-17 18:29:48,770 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 137 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-17 18:29:48,771 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 68 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-17 18:29:48,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-17 18:29:48,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 241. [2024-09-17 18:29:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 173 states have (on average 1.1445086705202312) internal successors, (198), 187 states have internal predecessors, (198), 53 states have call successors, (53), 15 states have call predecessors, (53), 14 states have return successors, (52), 38 states have call predecessors, (52), 52 states have call successors, (52) [2024-09-17 18:29:48,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 303 transitions. [2024-09-17 18:29:48,870 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 303 transitions. Word has length 43 [2024-09-17 18:29:48,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:29:48,870 INFO L474 AbstractCegarLoop]: Abstraction has 241 states and 303 transitions. [2024-09-17 18:29:48,870 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.5) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-17 18:29:48,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:29:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 303 transitions. [2024-09-17 18:29:48,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-17 18:29:48,872 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:29:48,872 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:29:48,888 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-17 18:29:49,076 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-17 18:29:49,077 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:29:49,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:29:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash -123973150, now seen corresponding path program 7 times [2024-09-17 18:29:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:29:49,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582754735] [2024-09-17 18:29:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:29:49,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:29:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:54,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:29:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:54,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-17 18:29:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:54,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:29:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:54,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:29:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:54,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-17 18:29:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:54,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:29:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:29:54,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:29:54,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582754735] [2024-09-17 18:29:54,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582754735] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:29:54,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735018564] [2024-09-17 18:29:54,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:29:54,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:29:54,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:29:54,591 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:29:54,595 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 18:29:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:29:54,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-17 18:29:54,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:29:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:29:55,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:29:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:29:55,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735018564] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:29:55,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:29:55,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 45 [2024-09-17 18:29:55,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451538530] [2024-09-17 18:29:55,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:29:55,901 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-17 18:29:55,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:29:55,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-17 18:29:55,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1799, Unknown=1, NotChecked=0, Total=1980 [2024-09-17 18:29:55,902 INFO L87 Difference]: Start difference. First operand 241 states and 303 transitions. Second operand has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-17 18:30:04,449 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 65 DAG size of output: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-17 18:30:12,636 WARN L293 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 54 DAG size of output: 50 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-17 18:30:20,740 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 35 DAG size of output: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-17 18:30:28,916 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-17 18:30:37,396 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 29 DAG size of output: 27 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-17 18:30:46,798 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-17 18:30:47,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:30:47,037 INFO L93 Difference]: Finished difference Result 295 states and 357 transitions. [2024-09-17 18:30:47,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-17 18:30:47,037 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 53 [2024-09-17 18:30:47,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:30:47,039 INFO L225 Difference]: With dead ends: 295 [2024-09-17 18:30:47,039 INFO L226 Difference]: Without dead ends: 239 [2024-09-17 18:30:47,041 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=613, Invalid=4642, Unknown=1, NotChecked=0, Total=5256 [2024-09-17 18:30:47,041 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 164 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:30:47,042 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 82 Invalid, 1870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1824 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-17 18:30:47,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-09-17 18:30:47,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2024-09-17 18:30:47,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 172 states have (on average 1.1337209302325582) internal successors, (195), 185 states have internal predecessors, (195), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (47), 34 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-17 18:30:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 290 transitions. [2024-09-17 18:30:47,130 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 290 transitions. Word has length 53 [2024-09-17 18:30:47,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:30:47,130 INFO L474 AbstractCegarLoop]: Abstraction has 238 states and 290 transitions. [2024-09-17 18:30:47,130 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-17 18:30:47,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:30:47,130 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 290 transitions. [2024-09-17 18:30:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-17 18:30:47,132 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:30:47,132 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:30:47,149 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-17 18:30:47,332 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-17 18:30:47,332 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:30:47,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:30:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash -978711902, now seen corresponding path program 8 times [2024-09-17 18:30:47,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:30:47,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810640836] [2024-09-17 18:30:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:30:47,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:30:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:30:48,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:30:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:30:48,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:30:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:30:48,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:30:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:30:48,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:30:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:30:48,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:30:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:30:48,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:30:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:30:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:30:48,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:30:48,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810640836] [2024-09-17 18:30:48,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810640836] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:30:48,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142236785] [2024-09-17 18:30:48,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:30:48,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:30:48,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:30:48,480 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:30:48,481 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-17 18:30:48,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:30:48,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:30:48,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-17 18:30:48,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:30:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:30:49,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:30:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:30:50,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142236785] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:30:50,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:30:50,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 17] total 51 [2024-09-17 18:30:50,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099519780] [2024-09-17 18:30:50,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:30:50,183 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-17 18:30:50,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:30:50,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-17 18:30:50,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2360, Unknown=0, NotChecked=0, Total=2550 [2024-09-17 18:30:50,185 INFO L87 Difference]: Start difference. First operand 238 states and 290 transitions. Second operand has 51 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 20 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-17 18:30:56,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:31:06,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:31:21,516 WARN L293 SmtUtils]: Spent 7.90s on a formula simplification. DAG size of input: 54 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-17 18:31:25,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:31:29,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:31:46,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:31:55,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:31:59,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:32:22,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:32:26,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:32:30,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:32:34,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []