./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.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 d2b9c65bc0d5e6814219e058019ca5895f861b5993bd9ff39cc6b3d5fb3e6a41 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 10:36:01,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 10:36:01,973 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 10:36:01,979 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 10:36:01,979 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 10:36:02,012 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 10:36:02,013 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 10:36:02,013 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 10:36:02,014 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 10:36:02,015 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 10:36:02,016 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 10:36:02,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 10:36:02,017 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 10:36:02,017 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 10:36:02,017 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 10:36:02,018 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 10:36:02,018 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 10:36:02,018 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 10:36:02,019 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 10:36:02,019 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 10:36:02,023 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 10:36:02,024 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 10:36:02,024 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 10:36:02,024 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 10:36:02,025 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 10:36:02,025 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 10:36:02,025 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 10:36:02,025 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 10:36:02,026 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 10:36:02,026 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 10:36:02,026 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 10:36:02,026 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 10:36:02,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:36:02,027 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 10:36:02,029 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 10:36:02,029 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 10:36:02,030 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 10:36:02,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 10:36:02,030 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 10:36:02,031 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 10:36:02,031 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 10:36:02,031 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 10:36:02,031 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 -> d2b9c65bc0d5e6814219e058019ca5895f861b5993bd9ff39cc6b3d5fb3e6a41 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true 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 [2024-09-25 10:36:02,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 10:36:02,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 10:36:02,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 10:36:02,379 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 10:36:02,380 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 10:36:02,381 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2024-09-25 10:36:03,881 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 10:36:04,088 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 10:36:04,089 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2024-09-25 10:36:04,098 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e0d6106c3/4ec55afc74134e08844ffc2e6da040ea/FLAGb62e98bad [2024-09-25 10:36:04,115 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e0d6106c3/4ec55afc74134e08844ffc2e6da040ea [2024-09-25 10:36:04,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 10:36:04,121 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 10:36:04,122 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 10:36:04,123 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 10:36:04,129 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 10:36:04,130 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:36:04" (1/1) ... [2024-09-25 10:36:04,131 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36499607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04, skipping insertion in model container [2024-09-25 10:36:04,131 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:36:04" (1/1) ... [2024-09-25 10:36:04,150 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 10:36:04,309 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/loop-invariants/linear-inequality-inv-a.c[860,873] [2024-09-25 10:36:04,315 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/loop-invariants/linear-inequality-inv-a.c[916,929] [2024-09-25 10:36:04,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:36:04,333 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 10:36:04,347 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/loop-invariants/linear-inequality-inv-a.c[860,873] [2024-09-25 10:36:04,349 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/loop-invariants/linear-inequality-inv-a.c[916,929] [2024-09-25 10:36:04,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:36:04,369 INFO L204 MainTranslator]: Completed translation [2024-09-25 10:36:04,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04 WrapperNode [2024-09-25 10:36:04,370 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 10:36:04,371 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 10:36:04,371 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 10:36:04,371 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 10:36:04,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04" (1/1) ... [2024-09-25 10:36:04,384 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04" (1/1) ... [2024-09-25 10:36:04,390 INFO L138 Inliner]: procedures = 11, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 10:36:04,390 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 10:36:04,391 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 10:36:04,391 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 10:36:04,391 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 10:36:04,401 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04" (1/1) ... [2024-09-25 10:36:04,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04" (1/1) ... [2024-09-25 10:36:04,402 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04" (1/1) ... [2024-09-25 10:36:04,417 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-25 10:36:04,417 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04" (1/1) ... [2024-09-25 10:36:04,418 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04" (1/1) ... [2024-09-25 10:36:04,420 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04" (1/1) ... [2024-09-25 10:36:04,423 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04" (1/1) ... [2024-09-25 10:36:04,424 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04" (1/1) ... [2024-09-25 10:36:04,425 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04" (1/1) ... [2024-09-25 10:36:04,427 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 10:36:04,427 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 10:36:04,431 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 10:36:04,431 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 10:36:04,432 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04" (1/1) ... [2024-09-25 10:36:04,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:36:04,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:36:04,464 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) [2024-09-25 10:36:04,467 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 [2024-09-25 10:36:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 10:36:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 10:36:04,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 10:36:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 10:36:04,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 10:36:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 10:36:04,513 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 10:36:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 10:36:04,578 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 10:36:04,581 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 10:36:04,744 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-25 10:36:04,745 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 10:36:04,769 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 10:36:04,771 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-25 10:36:04,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:36:04 BoogieIcfgContainer [2024-09-25 10:36:04,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 10:36:04,774 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 10:36:04,775 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 10:36:04,778 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 10:36:04,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:36:04" (1/3) ... [2024-09-25 10:36:04,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6db778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:36:04, skipping insertion in model container [2024-09-25 10:36:04,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:36:04" (2/3) ... [2024-09-25 10:36:04,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6db778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:36:04, skipping insertion in model container [2024-09-25 10:36:04,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:36:04" (3/3) ... [2024-09-25 10:36:04,782 INFO L112 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2024-09-25 10:36:04,799 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 10:36:04,800 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-25 10:36:04,864 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 10:36:04,871 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;@16c66630, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 10:36:04,872 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-25 10:36:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 10:36:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-25 10:36:04,882 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:36:04,883 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:36:04,885 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:36:04,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:04,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1128209337, now seen corresponding path program 1 times [2024-09-25 10:36:04,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:36:04,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799602753] [2024-09-25 10:36:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:36:04,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:36:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:05,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:36:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:05,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:36:05,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799602753] [2024-09-25 10:36:05,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799602753] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:36:05,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:36:05,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-25 10:36:05,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852252007] [2024-09-25 10:36:05,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:36:05,255 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-25 10:36:05,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:36:05,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-25 10:36:05,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 10:36:05,279 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:05,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:36:05,320 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2024-09-25 10:36:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-25 10:36:05,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-09-25 10:36:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:36:05,334 INFO L225 Difference]: With dead ends: 28 [2024-09-25 10:36:05,334 INFO L226 Difference]: Without dead ends: 14 [2024-09-25 10:36:05,336 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 10:36:05,344 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:36:05,345 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:36:05,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-25 10:36:05,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-25 10:36:05,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2024-09-25 10:36:05,384 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2024-09-25 10:36:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:36:05,384 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2024-09-25 10:36:05,384 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:05,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:05,385 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2024-09-25 10:36:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-25 10:36:05,387 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:36:05,388 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:36:05,388 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 10:36:05,388 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:36:05,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:05,393 INFO L85 PathProgramCache]: Analyzing trace with hash -614699191, now seen corresponding path program 1 times [2024-09-25 10:36:05,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:36:05,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47186103] [2024-09-25 10:36:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:36:05,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:36:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:05,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:36:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:05,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:36:05,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47186103] [2024-09-25 10:36:05,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47186103] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:36:05,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707999238] [2024-09-25 10:36:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:36:05,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:36:05,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:36:05,575 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) [2024-09-25 10:36:05,586 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 10:36:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:05,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-25 10:36:05,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:36:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:05,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:36:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:05,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707999238] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:36:05,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:36:05,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-25 10:36:05,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342122895] [2024-09-25 10:36:05,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:36:05,951 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 10:36:05,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:36:05,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 10:36:05,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-09-25 10:36:05,955 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:36:06,023 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2024-09-25 10:36:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 10:36:06,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-25 10:36:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:36:06,025 INFO L225 Difference]: With dead ends: 23 [2024-09-25 10:36:06,025 INFO L226 Difference]: Without dead ends: 21 [2024-09-25 10:36:06,025 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-09-25 10:36:06,026 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:36:06,027 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:36:06,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-25 10:36:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2024-09-25 10:36:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:06,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-09-25 10:36:06,032 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2024-09-25 10:36:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:36:06,032 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-09-25 10:36:06,032 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:06,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:06,033 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-09-25 10:36:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-25 10:36:06,033 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:36:06,033 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:36:06,050 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-25 10:36:06,237 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 [2024-09-25 10:36:06,238 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:36:06,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:06,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1875802668, now seen corresponding path program 1 times [2024-09-25 10:36:06,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:36:06,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773037193] [2024-09-25 10:36:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:36:06,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:36:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:06,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:36:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:06,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:36:06,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773037193] [2024-09-25 10:36:06,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773037193] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:36:06,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13447309] [2024-09-25 10:36:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:36:06,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:36:06,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:36:06,356 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) [2024-09-25 10:36:06,361 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 10:36:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:06,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-25 10:36:06,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:36:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:06,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:36:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:06,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13447309] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:36:06,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:36:06,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-25 10:36:06,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161759188] [2024-09-25 10:36:06,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:36:06,527 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 10:36:06,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:36:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 10:36:06,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:36:06,530 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:06,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:36:06,570 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2024-09-25 10:36:06,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 10:36:06,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-25 10:36:06,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:36:06,571 INFO L225 Difference]: With dead ends: 25 [2024-09-25 10:36:06,571 INFO L226 Difference]: Without dead ends: 17 [2024-09-25 10:36:06,572 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:36:06,573 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:36:06,574 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:36:06,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-25 10:36:06,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-25 10:36:06,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2024-09-25 10:36:06,580 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2024-09-25 10:36:06,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:36:06,582 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2024-09-25 10:36:06,582 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:06,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2024-09-25 10:36:06,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-25 10:36:06,584 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:36:06,584 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:36:06,600 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-25 10:36:06,784 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 [2024-09-25 10:36:06,785 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:36:06,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:06,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1288475847, now seen corresponding path program 2 times [2024-09-25 10:36:06,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:36:06,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980604169] [2024-09-25 10:36:06,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:36:06,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:36:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:07,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:36:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:07,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:36:07,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980604169] [2024-09-25 10:36:07,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980604169] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:36:07,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979489558] [2024-09-25 10:36:07,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:36:07,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:36:07,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:36:07,033 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) [2024-09-25 10:36:07,034 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 10:36:07,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:36:07,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:36:07,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-25 10:36:07,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:36:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:07,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:36:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:07,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979489558] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:36:07,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:36:07,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-25 10:36:07,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661562734] [2024-09-25 10:36:07,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:36:07,409 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-25 10:36:07,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:36:07,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-25 10:36:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:36:07,412 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:36:07,584 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2024-09-25 10:36:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 10:36:07,585 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-25 10:36:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:36:07,587 INFO L225 Difference]: With dead ends: 35 [2024-09-25 10:36:07,587 INFO L226 Difference]: Without dead ends: 33 [2024-09-25 10:36:07,587 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:36:07,588 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:36:07,589 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 54 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:36:07,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-25 10:36:07,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2024-09-25 10:36:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-09-25 10:36:07,601 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 13 [2024-09-25 10:36:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:36:07,602 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-09-25 10:36:07,602 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:07,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:07,603 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-09-25 10:36:07,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-25 10:36:07,604 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:36:07,604 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:36:07,622 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-25 10:36:07,804 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 [2024-09-25 10:36:07,805 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:36:07,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:07,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1288048662, now seen corresponding path program 2 times [2024-09-25 10:36:07,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:36:07,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875181193] [2024-09-25 10:36:07,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:36:07,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:36:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:07,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:36:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:07,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:36:08,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875181193] [2024-09-25 10:36:08,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875181193] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:36:08,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288924396] [2024-09-25 10:36:08,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:36:08,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:36:08,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:36:08,005 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) [2024-09-25 10:36:08,007 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 10:36:08,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:36:08,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:36:08,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-25 10:36:08,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:36:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:08,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:36:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:08,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288924396] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:36:08,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:36:08,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-09-25 10:36:08,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132368471] [2024-09-25 10:36:08,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:36:08,253 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-25 10:36:08,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:36:08,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-25 10:36:08,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-09-25 10:36:08,254 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:08,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:36:08,307 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-09-25 10:36:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 10:36:08,308 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-25 10:36:08,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:36:08,309 INFO L225 Difference]: With dead ends: 37 [2024-09-25 10:36:08,309 INFO L226 Difference]: Without dead ends: 23 [2024-09-25 10:36:08,309 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-09-25 10:36:08,310 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:36:08,310 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 48 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:36:08,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-25 10:36:08,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-25 10:36:08,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2024-09-25 10:36:08,320 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14 [2024-09-25 10:36:08,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:36:08,321 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2024-09-25 10:36:08,321 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:08,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:08,322 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2024-09-25 10:36:08,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-25 10:36:08,323 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:36:08,323 INFO L216 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:36:08,340 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 10:36:08,523 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 [2024-09-25 10:36:08,524 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:36:08,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:08,526 INFO L85 PathProgramCache]: Analyzing trace with hash 599336327, now seen corresponding path program 3 times [2024-09-25 10:36:08,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:36:08,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51791656] [2024-09-25 10:36:08,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:36:08,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:36:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:08,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:36:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:08,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:36:08,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51791656] [2024-09-25 10:36:08,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51791656] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:36:08,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123118361] [2024-09-25 10:36:08,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:36:08,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:36:08,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:36:08,907 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) [2024-09-25 10:36:08,909 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 10:36:08,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-25 10:36:08,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:36:08,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-25 10:36:08,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:36:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:09,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:36:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:09,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123118361] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:36:09,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:36:09,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-25 10:36:09,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694926826] [2024-09-25 10:36:09,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:36:09,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 10:36:09,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:36:09,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 10:36:09,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=350, Unknown=0, NotChecked=0, Total=600 [2024-09-25 10:36:09,831 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:36:10,361 INFO L93 Difference]: Finished difference Result 59 states and 82 transitions. [2024-09-25 10:36:10,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-25 10:36:10,362 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-25 10:36:10,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:36:10,363 INFO L225 Difference]: With dead ends: 59 [2024-09-25 10:36:10,363 INFO L226 Difference]: Without dead ends: 57 [2024-09-25 10:36:10,364 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=750, Invalid=1230, Unknown=0, NotChecked=0, Total=1980 [2024-09-25 10:36:10,365 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:36:10,365 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 77 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:36:10,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-25 10:36:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2024-09-25 10:36:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2024-09-25 10:36:10,378 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 19 [2024-09-25 10:36:10,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:36:10,378 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2024-09-25 10:36:10,378 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:10,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2024-09-25 10:36:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-25 10:36:10,379 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:36:10,379 INFO L216 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:36:10,396 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 10:36:10,580 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 [2024-09-25 10:36:10,580 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:36:10,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:10,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1399560022, now seen corresponding path program 3 times [2024-09-25 10:36:10,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:36:10,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210719496] [2024-09-25 10:36:10,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:36:10,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:36:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:10,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:36:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:10,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:36:10,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210719496] [2024-09-25 10:36:10,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210719496] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:36:10,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061698427] [2024-09-25 10:36:10,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:36:10,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:36:10,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:36:10,973 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) [2024-09-25 10:36:10,974 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 10:36:11,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-25 10:36:11,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:36:11,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-25 10:36:11,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:36:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:11,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:36:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:11,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061698427] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:36:11,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:36:11,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-09-25 10:36:11,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747627036] [2024-09-25 10:36:11,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:36:11,538 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 10:36:11,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:36:11,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 10:36:11,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2024-09-25 10:36:11,539 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:36:11,621 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2024-09-25 10:36:11,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-25 10:36:11,621 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-25 10:36:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:36:11,622 INFO L225 Difference]: With dead ends: 61 [2024-09-25 10:36:11,622 INFO L226 Difference]: Without dead ends: 35 [2024-09-25 10:36:11,623 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2024-09-25 10:36:11,625 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:36:11,625 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:36:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-25 10:36:11,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-25 10:36:11,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2024-09-25 10:36:11,635 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 20 [2024-09-25 10:36:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:36:11,636 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2024-09-25 10:36:11,636 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:11,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:11,637 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2024-09-25 10:36:11,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-25 10:36:11,638 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:36:11,638 INFO L216 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:36:11,655 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-25 10:36:11,842 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 [2024-09-25 10:36:11,843 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:36:11,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:11,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1300261113, now seen corresponding path program 4 times [2024-09-25 10:36:11,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:36:11,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238668519] [2024-09-25 10:36:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:36:11,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:36:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:12,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:36:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:12,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:36:12,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238668519] [2024-09-25 10:36:12,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238668519] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:36:12,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304824654] [2024-09-25 10:36:12,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:36:12,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:36:12,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:36:12,851 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) [2024-09-25 10:36:12,852 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 10:36:12,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:36:12,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:36:12,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-25 10:36:12,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:36:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:13,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:36:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:14,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304824654] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:36:14,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:36:14,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-09-25 10:36:14,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594561009] [2024-09-25 10:36:14,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:36:14,625 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-25 10:36:14,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:36:14,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-25 10:36:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1066, Invalid=1286, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 10:36:14,627 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:15,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:36:15,864 INFO L93 Difference]: Finished difference Result 107 states and 154 transitions. [2024-09-25 10:36:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-09-25 10:36:15,864 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-25 10:36:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:36:15,865 INFO L225 Difference]: With dead ends: 107 [2024-09-25 10:36:15,865 INFO L226 Difference]: Without dead ends: 105 [2024-09-25 10:36:15,869 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3222, Invalid=5334, Unknown=0, NotChecked=0, Total=8556 [2024-09-25 10:36:15,869 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 98 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:36:15,869 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 84 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:36:15,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-09-25 10:36:15,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 60. [2024-09-25 10:36:15,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 56 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:15,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2024-09-25 10:36:15,890 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 31 [2024-09-25 10:36:15,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:36:15,891 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2024-09-25 10:36:15,891 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:15,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2024-09-25 10:36:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-25 10:36:15,893 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:36:15,893 INFO L216 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:36:15,908 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-25 10:36:16,096 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 [2024-09-25 10:36:16,097 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:36:16,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:16,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1653385770, now seen corresponding path program 4 times [2024-09-25 10:36:16,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:36:16,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893719216] [2024-09-25 10:36:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:36:16,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:36:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:16,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:36:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:16,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:36:16,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893719216] [2024-09-25 10:36:16,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893719216] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:36:16,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816657460] [2024-09-25 10:36:16,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:36:16,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:36:16,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:36:16,946 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) [2024-09-25 10:36:16,947 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 10:36:17,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:36:17,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:36:17,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-25 10:36:17,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:36:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:17,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:36:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:18,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816657460] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:36:18,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:36:18,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-09-25 10:36:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081134575] [2024-09-25 10:36:18,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:36:18,481 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-25 10:36:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:36:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-25 10:36:18,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 10:36:18,482 INFO L87 Difference]: Start difference. First operand 60 states and 84 transitions. Second operand has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:18,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:36:18,599 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2024-09-25 10:36:18,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-25 10:36:18,599 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-25 10:36:18,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:36:18,600 INFO L225 Difference]: With dead ends: 109 [2024-09-25 10:36:18,600 INFO L226 Difference]: Without dead ends: 59 [2024-09-25 10:36:18,601 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 10:36:18,602 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:36:18,602 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 71 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:36:18,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-25 10:36:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-25 10:36:18,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2024-09-25 10:36:18,610 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 32 [2024-09-25 10:36:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:36:18,610 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2024-09-25 10:36:18,611 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:18,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2024-09-25 10:36:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-25 10:36:18,612 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:36:18,612 INFO L216 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:36:18,630 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-25 10:36:18,813 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 [2024-09-25 10:36:18,813 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:36:18,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:18,814 INFO L85 PathProgramCache]: Analyzing trace with hash -426657273, now seen corresponding path program 5 times [2024-09-25 10:36:18,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:36:18,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378495274] [2024-09-25 10:36:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:36:18,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:36:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:21,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:36:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:21,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:36:21,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378495274] [2024-09-25 10:36:21,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378495274] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:36:21,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849507861] [2024-09-25 10:36:21,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:36:21,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:36:21,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:36:21,835 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) [2024-09-25 10:36:21,837 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 10:36:23,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-25 10:36:23,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:36:23,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-25 10:36:23,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:36:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:23,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:36:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:26,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849507861] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:36:26,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:36:26,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-09-25 10:36:26,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243292820] [2024-09-25 10:36:26,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:36:26,792 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-09-25 10:36:26,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:36:26,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-09-25 10:36:26,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4426, Invalid=4886, Unknown=0, NotChecked=0, Total=9312 [2024-09-25 10:36:26,796 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:36:30,042 INFO L93 Difference]: Finished difference Result 203 states and 298 transitions. [2024-09-25 10:36:30,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2024-09-25 10:36:30,043 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2024-09-25 10:36:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:36:30,044 INFO L225 Difference]: With dead ends: 203 [2024-09-25 10:36:30,044 INFO L226 Difference]: Without dead ends: 201 [2024-09-25 10:36:30,050 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7521 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=13350, Invalid=22182, Unknown=0, NotChecked=0, Total=35532 [2024-09-25 10:36:30,050 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 254 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:36:30,050 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 127 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:36:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-25 10:36:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 108. [2024-09-25 10:36:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.4854368932038835) internal successors, (153), 104 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 156 transitions. [2024-09-25 10:36:30,065 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 156 transitions. Word has length 55 [2024-09-25 10:36:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:36:30,066 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 156 transitions. [2024-09-25 10:36:30,066 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:30,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:30,066 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 156 transitions. [2024-09-25 10:36:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-25 10:36:30,068 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:36:30,068 INFO L216 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:36:30,083 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-25 10:36:30,268 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 [2024-09-25 10:36:30,269 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:36:30,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:30,269 INFO L85 PathProgramCache]: Analyzing trace with hash -341470506, now seen corresponding path program 5 times [2024-09-25 10:36:30,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:36:30,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702363508] [2024-09-25 10:36:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:36:30,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:36:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:33,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:36:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:33,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:36:33,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702363508] [2024-09-25 10:36:33,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702363508] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:36:33,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862849323] [2024-09-25 10:36:33,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:36:33,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:36:33,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:36:33,102 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) [2024-09-25 10:36:33,104 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 10:36:34,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-25 10:36:34,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:36:34,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-25 10:36:34,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:36:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:34,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:36:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:37,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862849323] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:36:37,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:36:37,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 96 [2024-09-25 10:36:37,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829283801] [2024-09-25 10:36:37,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:36:37,942 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-09-25 10:36:37,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:36:37,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-09-25 10:36:37,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-09-25 10:36:37,944 INFO L87 Difference]: Start difference. First operand 108 states and 156 transitions. Second operand has 96 states, 96 states have (on average 1.0729166666666667) internal successors, (103), 96 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:38,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:36:38,187 INFO L93 Difference]: Finished difference Result 205 states and 252 transitions. [2024-09-25 10:36:38,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-09-25 10:36:38,188 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0729166666666667) internal successors, (103), 96 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2024-09-25 10:36:38,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:36:38,189 INFO L225 Difference]: With dead ends: 205 [2024-09-25 10:36:38,189 INFO L226 Difference]: Without dead ends: 107 [2024-09-25 10:36:38,190 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-09-25 10:36:38,190 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 328 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:36:38,190 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 92 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:36:38,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-25 10:36:38,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-09-25 10:36:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 103 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2024-09-25 10:36:38,203 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 56 [2024-09-25 10:36:38,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:36:38,203 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2024-09-25 10:36:38,203 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0729166666666667) internal successors, (103), 96 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:36:38,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:38,204 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2024-09-25 10:36:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-25 10:36:38,205 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:36:38,205 INFO L216 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:36:38,218 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-25 10:36:38,405 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 [2024-09-25 10:36:38,406 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:36:38,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:36:38,406 INFO L85 PathProgramCache]: Analyzing trace with hash -146079737, now seen corresponding path program 6 times [2024-09-25 10:36:38,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:36:38,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437933707] [2024-09-25 10:36:38,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:36:38,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:36:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:47,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:36:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:36:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:47,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:36:47,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437933707] [2024-09-25 10:36:47,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437933707] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:36:47,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519970173] [2024-09-25 10:36:47,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:36:47,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:36:47,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:36:47,782 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) [2024-09-25 10:36:47,783 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 10:36:52,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2024-09-25 10:36:52,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:36:52,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-09-25 10:36:52,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:36:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:36:52,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:37:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:37:04,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519970173] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:37:04,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:37:04,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2024-09-25 10:37:04,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014756753] [2024-09-25 10:37:04,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:37:04,309 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-09-25 10:37:04,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:37:04,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-09-25 10:37:04,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18058, Invalid=18998, Unknown=0, NotChecked=0, Total=37056 [2024-09-25 10:37:04,327 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 193 states have internal predecessors, (200), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:37:16,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:37:16,684 INFO L93 Difference]: Finished difference Result 395 states and 586 transitions. [2024-09-25 10:37:16,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2024-09-25 10:37:16,685 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 193 states have internal predecessors, (200), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2024-09-25 10:37:16,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:37:16,687 INFO L225 Difference]: With dead ends: 395 [2024-09-25 10:37:16,687 INFO L226 Difference]: Without dead ends: 393 [2024-09-25 10:37:16,697 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 379 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31161 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=54342, Invalid=90438, Unknown=0, NotChecked=0, Total=144780 [2024-09-25 10:37:16,697 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 815 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:37:16,698 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [815 Valid, 151 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:37:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2024-09-25 10:37:16,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 204. [2024-09-25 10:37:16,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.4924623115577889) internal successors, (297), 200 states have internal predecessors, (297), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:37:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 300 transitions. [2024-09-25 10:37:16,723 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 300 transitions. Word has length 103 [2024-09-25 10:37:16,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:37:16,724 INFO L474 AbstractCegarLoop]: Abstraction has 204 states and 300 transitions. [2024-09-25 10:37:16,724 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 193 states have internal predecessors, (200), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:37:16,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:16,725 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 300 transitions. [2024-09-25 10:37:16,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-25 10:37:16,726 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:37:16,726 INFO L216 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:37:16,744 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-25 10:37:16,926 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:16,927 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:37:16,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:16,927 INFO L85 PathProgramCache]: Analyzing trace with hash -233501482, now seen corresponding path program 6 times [2024-09-25 10:37:16,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:37:16,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866726076] [2024-09-25 10:37:16,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:16,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:37:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:25,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:37:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:37:25,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:37:25,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866726076] [2024-09-25 10:37:25,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866726076] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:37:25,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012198512] [2024-09-25 10:37:25,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:37:25,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:25,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:37:25,408 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:37:25,409 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 10:37:33,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2024-09-25 10:37:33,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:37:33,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-09-25 10:37:33,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:37:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:37:34,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:37:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:37:45,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012198512] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:37:45,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:37:45,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 192 [2024-09-25 10:37:45,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867596168] [2024-09-25 10:37:45,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:37:45,963 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2024-09-25 10:37:45,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:37:45,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2024-09-25 10:37:45,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2024-09-25 10:37:45,971 INFO L87 Difference]: Start difference. First operand 204 states and 300 transitions. Second operand has 192 states, 192 states have (on average 1.0364583333333333) internal successors, (199), 192 states have internal predecessors, (199), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:37:47,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:37:47,109 INFO L93 Difference]: Finished difference Result 397 states and 492 transitions. [2024-09-25 10:37:47,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-09-25 10:37:47,109 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0364583333333333) internal successors, (199), 192 states have internal predecessors, (199), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2024-09-25 10:37:47,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:37:47,111 INFO L225 Difference]: With dead ends: 397 [2024-09-25 10:37:47,111 INFO L226 Difference]: Without dead ends: 203 [2024-09-25 10:37:47,113 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2024-09-25 10:37:47,114 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 754 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:37:47,114 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 151 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:37:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-09-25 10:37:47,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2024-09-25 10:37:47,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 199 states have internal predecessors, (200), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:37:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2024-09-25 10:37:47,135 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 104 [2024-09-25 10:37:47,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:37:47,135 INFO L474 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2024-09-25 10:37:47,135 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0364583333333333) internal successors, (199), 192 states have internal predecessors, (199), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:37:47,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2024-09-25 10:37:47,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2024-09-25 10:37:47,138 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:37:47,138 INFO L216 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:37:47,151 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-25 10:37:47,338 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-25 10:37:47,338 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:37:47,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1357804537, now seen corresponding path program 7 times [2024-09-25 10:37:47,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:37:47,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926007409] [2024-09-25 10:37:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:47,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:37:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:38:23,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:38:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:38:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:38:23,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:38:23,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926007409] [2024-09-25 10:38:23,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926007409] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:38:23,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755034399] [2024-09-25 10:38:23,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:38:23,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:38:23,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:38:23,512 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:38:23,512 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 10:38:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:38:24,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 383 conjuncts are in the unsatisfiable core [2024-09-25 10:38:24,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:38:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:38:25,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:39:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:39:10,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755034399] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:39:10,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:39:10,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2024-09-25 10:39:10,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409571961] [2024-09-25 10:39:10,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:39:10,658 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-09-25 10:39:10,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:39:10,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-09-25 10:39:10,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72970, Invalid=74870, Unknown=0, NotChecked=0, Total=147840 [2024-09-25 10:39:10,672 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand has 385 states, 385 states have (on average 1.018181818181818) internal successors, (392), 385 states have internal predecessors, (392), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:40:02,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:40:02,345 INFO L93 Difference]: Finished difference Result 779 states and 1162 transitions. [2024-09-25 10:40:02,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 574 states. [2024-09-25 10:40:02,346 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.018181818181818) internal successors, (392), 385 states have internal predecessors, (392), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2024-09-25 10:40:02,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:40:02,350 INFO L225 Difference]: With dead ends: 779 [2024-09-25 10:40:02,350 INFO L226 Difference]: Without dead ends: 777 [2024-09-25 10:40:02,373 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 972 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 763 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126825 ImplicationChecksByTransitivity, 99.7s TimeCoverageRelationStatistics Valid=219270, Invalid=365190, Unknown=0, NotChecked=0, Total=584460 [2024-09-25 10:40:02,373 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2072 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2072 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:40:02,374 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2072 Valid, 249 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 10:40:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2024-09-25 10:40:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 396. [2024-09-25 10:40:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 391 states have (on average 1.4961636828644502) internal successors, (585), 392 states have internal predecessors, (585), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:40:02,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 588 transitions. [2024-09-25 10:40:02,408 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 588 transitions. Word has length 199 [2024-09-25 10:40:02,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:40:02,408 INFO L474 AbstractCegarLoop]: Abstraction has 396 states and 588 transitions. [2024-09-25 10:40:02,409 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.018181818181818) internal successors, (392), 385 states have internal predecessors, (392), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:40:02,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:40:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 588 transitions. [2024-09-25 10:40:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-09-25 10:40:02,411 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:40:02,411 INFO L216 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:40:02,432 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-25 10:40:02,612 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-25 10:40:02,612 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:40:02,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:40:02,612 INFO L85 PathProgramCache]: Analyzing trace with hash 857735382, now seen corresponding path program 7 times [2024-09-25 10:40:02,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:40:02,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784904171] [2024-09-25 10:40:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:40:02,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:40:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat