./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 --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/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 --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 22:52:38,417 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 22:52:38,491 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 22:52:38,499 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 22:52:38,499 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 22:52:38,526 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 22:52:38,528 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 22:52:38,529 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 22:52:38,530 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 22:52:38,530 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 22:52:38,531 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 22:52:38,532 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 22:52:38,532 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 22:52:38,533 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 22:52:38,534 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 22:52:38,535 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 22:52:38,535 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 22:52:38,535 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 22:52:38,536 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 22:52:38,536 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 22:52:38,536 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 22:52:38,539 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 22:52:38,539 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 22:52:38,540 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 22:52:38,540 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 22:52:38,540 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 22:52:38,540 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 22:52:38,541 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 22:52:38,541 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 22:52:38,541 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 22:52:38,541 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 22:52:38,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 22:52:38,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:52:38,542 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 22:52:38,542 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 22:52:38,543 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 22:52:38,543 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 22:52:38,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 22:52:38,543 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 22:52:38,543 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 22:52:38,544 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 22:52:38,546 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 22:52:38,546 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2b9c65bc0d5e6814219e058019ca5895f861b5993bd9ff39cc6b3d5fb3e6a41 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 22:52:38,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 22:52:38,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 22:52:38,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 22:52:38,816 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 22:52:38,817 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 22:52:38,818 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2024-09-12 22:52:40,243 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 22:52:40,425 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 22:52:40,425 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2024-09-12 22:52:40,435 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/80bb9b05c/cb7961a644f548dab5eaf049cb61aa44/FLAG93432269b [2024-09-12 22:52:40,452 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/80bb9b05c/cb7961a644f548dab5eaf049cb61aa44 [2024-09-12 22:52:40,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 22:52:40,456 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 22:52:40,457 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 22:52:40,457 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 22:52:40,465 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 22:52:40,466 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:52:40" (1/1) ... [2024-09-12 22:52:40,467 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d605f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40, skipping insertion in model container [2024-09-12 22:52:40,467 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:52:40" (1/1) ... [2024-09-12 22:52:40,487 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 22:52:40,655 WARN L247 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] [2024-09-12 22:52:40,662 WARN L247 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] [2024-09-12 22:52:40,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:52:40,677 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 22:52:40,691 WARN L247 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] [2024-09-12 22:52:40,692 WARN L247 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] [2024-09-12 22:52:40,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:52:40,713 INFO L204 MainTranslator]: Completed translation [2024-09-12 22:52:40,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40 WrapperNode [2024-09-12 22:52:40,714 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 22:52:40,715 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 22:52:40,716 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 22:52:40,716 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 22:52:40,722 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40" (1/1) ... [2024-09-12 22:52:40,728 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40" (1/1) ... [2024-09-12 22:52:40,734 INFO L138 Inliner]: procedures = 11, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 22:52:40,735 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 22:52:40,736 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 22:52:40,736 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 22:52:40,736 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 22:52:40,745 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40" (1/1) ... [2024-09-12 22:52:40,746 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40" (1/1) ... [2024-09-12 22:52:40,746 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40" (1/1) ... [2024-09-12 22:52:40,762 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]. [2024-09-12 22:52:40,763 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40" (1/1) ... [2024-09-12 22:52:40,763 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40" (1/1) ... [2024-09-12 22:52:40,766 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40" (1/1) ... [2024-09-12 22:52:40,768 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40" (1/1) ... [2024-09-12 22:52:40,769 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40" (1/1) ... [2024-09-12 22:52:40,770 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40" (1/1) ... [2024-09-12 22:52:40,775 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 22:52:40,776 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 22:52:40,776 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 22:52:40,776 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 22:52:40,776 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40" (1/1) ... [2024-09-12 22:52:40,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:52:40,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:52:40,807 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) [2024-09-12 22:52:40,826 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 [2024-09-12 22:52:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 22:52:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 22:52:40,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 22:52:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 22:52:40,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 22:52:40,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 22:52:40,871 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 22:52:40,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 22:52:40,940 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 22:52:40,942 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 22:52:41,056 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-12 22:52:41,056 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 22:52:41,084 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 22:52:41,084 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 22:52:41,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:52:41 BoogieIcfgContainer [2024-09-12 22:52:41,085 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 22:52:41,087 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 22:52:41,087 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 22:52:41,090 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 22:52:41,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 10:52:40" (1/3) ... [2024-09-12 22:52:41,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63046538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:52:41, skipping insertion in model container [2024-09-12 22:52:41,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:52:40" (2/3) ... [2024-09-12 22:52:41,092 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63046538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:52:41, skipping insertion in model container [2024-09-12 22:52:41,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:52:41" (3/3) ... [2024-09-12 22:52:41,093 INFO L112 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2024-09-12 22:52:41,113 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 22:52:41,114 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-12 22:52:41,170 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 22:52:41,178 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;@196a2047, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 22:52:41,178 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-12 22:52:41,182 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) [2024-09-12 22:52:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-12 22:52:41,191 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:52:41,192 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:52:41,193 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:52:41,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:41,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1128209337, now seen corresponding path program 1 times [2024-09-12 22:52:41,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:52:41,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791539509] [2024-09-12 22:52:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:52:41,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:52:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:41,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:52:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:41,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:52:41,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791539509] [2024-09-12 22:52:41,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791539509] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:52:41,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:52:41,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:52:41,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536947024] [2024-09-12 22:52:41,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:52:41,517 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:52:41,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:52:41,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:52:41,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:52:41,543 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) [2024-09-12 22:52:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:52:41,571 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2024-09-12 22:52:41,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:52:41,573 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 [2024-09-12 22:52:41,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:52:41,580 INFO L225 Difference]: With dead ends: 28 [2024-09-12 22:52:41,580 INFO L226 Difference]: Without dead ends: 14 [2024-09-12 22:52:41,583 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 [2024-09-12 22:52:41,586 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 [2024-09-12 22:52:41,587 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] [2024-09-12 22:52:41,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-12 22:52:41,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-12 22:52:41,622 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) [2024-09-12 22:52:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2024-09-12 22:52:41,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2024-09-12 22:52:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:52:41,626 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2024-09-12 22:52:41,627 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) [2024-09-12 22:52:41,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2024-09-12 22:52:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 22:52:41,629 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:52:41,629 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:52:41,629 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 22:52:41,629 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:52:41,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:41,630 INFO L85 PathProgramCache]: Analyzing trace with hash -614699191, now seen corresponding path program 1 times [2024-09-12 22:52:41,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:52:41,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279063995] [2024-09-12 22:52:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:52:41,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:52:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:41,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:52:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:41,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:52:41,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279063995] [2024-09-12 22:52:41,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279063995] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:52:41,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223201407] [2024-09-12 22:52:41,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:52:41,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:52:41,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:52:41,843 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) [2024-09-12 22:52:41,847 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 22:52:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:41,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-12 22:52:41,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:52:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:41,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:52:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:42,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223201407] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:52:42,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:52:42,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-12 22:52:42,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554462915] [2024-09-12 22:52:42,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:52:42,180 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 22:52:42,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:52:42,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 22:52:42,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-09-12 22:52:42,183 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) [2024-09-12 22:52:42,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:52:42,268 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2024-09-12 22:52:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 22:52:42,269 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 [2024-09-12 22:52:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:52:42,270 INFO L225 Difference]: With dead ends: 23 [2024-09-12 22:52:42,270 INFO L226 Difference]: Without dead ends: 21 [2024-09-12 22:52:42,271 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 [2024-09-12 22:52:42,272 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 [2024-09-12 22:52:42,272 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] [2024-09-12 22:52:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-12 22:52:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2024-09-12 22:52:42,285 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) [2024-09-12 22:52:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-09-12 22:52:42,286 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2024-09-12 22:52:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:52:42,286 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-09-12 22:52:42,286 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) [2024-09-12 22:52:42,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-09-12 22:52:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-12 22:52:42,287 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:52:42,287 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:52:42,305 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 22:52:42,492 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 [2024-09-12 22:52:42,493 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:52:42,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:42,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1875802668, now seen corresponding path program 1 times [2024-09-12 22:52:42,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:52:42,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505485384] [2024-09-12 22:52:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:52:42,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:52:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:42,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:52:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:42,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:52:42,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505485384] [2024-09-12 22:52:42,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505485384] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:52:42,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817669936] [2024-09-12 22:52:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:52:42,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:52:42,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:52:42,614 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) [2024-09-12 22:52:42,616 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 22:52:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:42,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-12 22:52:42,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:52:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:42,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:52:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:42,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817669936] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:52:42,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:52:42,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-12 22:52:42,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432611050] [2024-09-12 22:52:42,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:52:42,766 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 22:52:42,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:52:42,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 22:52:42,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-09-12 22:52:42,767 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) [2024-09-12 22:52:42,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:52:42,806 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2024-09-12 22:52:42,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 22:52:42,806 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 [2024-09-12 22:52:42,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:52:42,807 INFO L225 Difference]: With dead ends: 25 [2024-09-12 22:52:42,807 INFO L226 Difference]: Without dead ends: 17 [2024-09-12 22:52:42,808 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 [2024-09-12 22:52:42,809 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 [2024-09-12 22:52:42,810 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] [2024-09-12 22:52:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-12 22:52:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-12 22:52:42,816 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) [2024-09-12 22:52:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2024-09-12 22:52:42,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2024-09-12 22:52:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:52:42,818 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2024-09-12 22:52:42,819 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) [2024-09-12 22:52:42,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:42,820 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2024-09-12 22:52:42,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-12 22:52:42,820 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:52:42,820 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:52:42,836 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 22:52:43,021 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 [2024-09-12 22:52:43,021 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:52:43,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:43,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1288475847, now seen corresponding path program 2 times [2024-09-12 22:52:43,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:52:43,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471005550] [2024-09-12 22:52:43,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:52:43,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:52:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:43,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:52:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:43,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:52:43,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471005550] [2024-09-12 22:52:43,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471005550] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:52:43,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183871796] [2024-09-12 22:52:43,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:52:43,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:52:43,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:52:43,224 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) [2024-09-12 22:52:43,225 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 22:52:43,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:52:43,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:52:43,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 22:52:43,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:52:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:43,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:52:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:43,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183871796] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:52:43,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:52:43,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-12 22:52:43,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235888333] [2024-09-12 22:52:43,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:52:43,590 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 22:52:43,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:52:43,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 22:52:43,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-09-12 22:52:43,591 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) [2024-09-12 22:52:43,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:52:43,790 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2024-09-12 22:52:43,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 22:52:43,793 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 [2024-09-12 22:52:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:52:43,795 INFO L225 Difference]: With dead ends: 35 [2024-09-12 22:52:43,795 INFO L226 Difference]: Without dead ends: 33 [2024-09-12 22:52:43,796 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 [2024-09-12 22:52:43,797 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:52:43,798 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 54 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:52:43,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-12 22:52:43,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2024-09-12 22:52:43,809 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) [2024-09-12 22:52:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-09-12 22:52:43,811 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 13 [2024-09-12 22:52:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:52:43,811 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-09-12 22:52:43,812 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) [2024-09-12 22:52:43,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-09-12 22:52:43,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-12 22:52:43,813 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:52:43,813 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:52:43,829 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 22:52:44,017 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 [2024-09-12 22:52:44,018 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:52:44,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:44,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1288048662, now seen corresponding path program 2 times [2024-09-12 22:52:44,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:52:44,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900082064] [2024-09-12 22:52:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:52:44,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:52:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:44,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:52:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:44,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:52:44,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900082064] [2024-09-12 22:52:44,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900082064] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:52:44,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362278373] [2024-09-12 22:52:44,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:52:44,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:52:44,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:52:44,183 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) [2024-09-12 22:52:44,185 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 22:52:44,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:52:44,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:52:44,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 22:52:44,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:52:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:44,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:52:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:44,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362278373] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:52:44,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:52:44,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-09-12 22:52:44,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766854189] [2024-09-12 22:52:44,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:52:44,409 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-12 22:52:44,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:52:44,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-12 22:52:44,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-09-12 22:52:44,410 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) [2024-09-12 22:52:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:52:44,455 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-09-12 22:52:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 22:52:44,455 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 [2024-09-12 22:52:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:52:44,456 INFO L225 Difference]: With dead ends: 37 [2024-09-12 22:52:44,456 INFO L226 Difference]: Without dead ends: 23 [2024-09-12 22:52:44,456 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 [2024-09-12 22:52:44,457 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 [2024-09-12 22:52:44,458 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] [2024-09-12 22:52:44,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-12 22:52:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-12 22:52:44,463 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) [2024-09-12 22:52:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2024-09-12 22:52:44,464 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14 [2024-09-12 22:52:44,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:52:44,464 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2024-09-12 22:52:44,464 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) [2024-09-12 22:52:44,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:44,465 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2024-09-12 22:52:44,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-12 22:52:44,465 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:52:44,465 INFO L216 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:52:44,482 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 22:52:44,669 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 [2024-09-12 22:52:44,672 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:52:44,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:44,672 INFO L85 PathProgramCache]: Analyzing trace with hash 599336327, now seen corresponding path program 3 times [2024-09-12 22:52:44,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:52:44,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443692340] [2024-09-12 22:52:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:52:44,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:52:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:45,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:52:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:45,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:52:45,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443692340] [2024-09-12 22:52:45,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443692340] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:52:45,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581100921] [2024-09-12 22:52:45,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:52:45,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:52:45,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:52:45,034 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) [2024-09-12 22:52:45,036 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 22:52:45,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-12 22:52:45,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:52:45,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-12 22:52:45,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:52:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:45,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:52:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:49,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581100921] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:52:49,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:52:49,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-12 22:52:49,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555062069] [2024-09-12 22:52:49,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:52:49,371 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 22:52:49,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:52:49,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 22:52:49,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=350, Unknown=0, NotChecked=0, Total=600 [2024-09-12 22:52:49,374 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) [2024-09-12 22:52:49,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:52:49,958 INFO L93 Difference]: Finished difference Result 59 states and 82 transitions. [2024-09-12 22:52:49,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-12 22:52:49,958 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 [2024-09-12 22:52:49,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:52:49,959 INFO L225 Difference]: With dead ends: 59 [2024-09-12 22:52:49,959 INFO L226 Difference]: Without dead ends: 57 [2024-09-12 22:52:49,960 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=750, Invalid=1230, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 22:52:49,961 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 [2024-09-12 22:52:49,961 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] [2024-09-12 22:52:49,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-12 22:52:49,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2024-09-12 22:52:49,968 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) [2024-09-12 22:52:49,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2024-09-12 22:52:49,969 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 19 [2024-09-12 22:52:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:52:49,969 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2024-09-12 22:52:49,969 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) [2024-09-12 22:52:49,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2024-09-12 22:52:49,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 22:52:49,970 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:52:49,971 INFO L216 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:52:49,986 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 22:52:50,174 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 [2024-09-12 22:52:50,175 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:52:50,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:50,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1399560022, now seen corresponding path program 3 times [2024-09-12 22:52:50,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:52:50,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696286002] [2024-09-12 22:52:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:52:50,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:52:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:50,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:52:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:50,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:52:50,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696286002] [2024-09-12 22:52:50,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696286002] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:52:50,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729735628] [2024-09-12 22:52:50,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:52:50,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:52:50,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:52:50,535 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) [2024-09-12 22:52:50,536 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 22:52:50,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-12 22:52:50,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:52:50,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-12 22:52:50,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:52:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:50,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:52:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:51,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729735628] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:52:51,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:52:51,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-09-12 22:52:51,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028812545] [2024-09-12 22:52:51,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:52:51,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 22:52:51,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:52:51,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 22:52:51,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2024-09-12 22:52:51,018 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) [2024-09-12 22:52:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:52:51,093 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2024-09-12 22:52:51,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 22:52:51,094 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 [2024-09-12 22:52:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:52:51,095 INFO L225 Difference]: With dead ends: 61 [2024-09-12 22:52:51,095 INFO L226 Difference]: Without dead ends: 35 [2024-09-12 22:52:51,095 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2024-09-12 22:52:51,096 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 [2024-09-12 22:52:51,096 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] [2024-09-12 22:52:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-12 22:52:51,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-12 22:52:51,102 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) [2024-09-12 22:52:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2024-09-12 22:52:51,102 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 20 [2024-09-12 22:52:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:52:51,103 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2024-09-12 22:52:51,103 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) [2024-09-12 22:52:51,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2024-09-12 22:52:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-12 22:52:51,104 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:52:51,104 INFO L216 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:52:51,120 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 22:52:51,305 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 [2024-09-12 22:52:51,305 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:52:51,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:51,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1300261113, now seen corresponding path program 4 times [2024-09-12 22:52:51,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:52:51,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954851901] [2024-09-12 22:52:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:52:51,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:52:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:52,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:52:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:52:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:52,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:52:52,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954851901] [2024-09-12 22:52:52,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954851901] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:52:52,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201781877] [2024-09-12 22:52:52,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:52:52,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:52:52,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:52:52,268 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) [2024-09-12 22:52:52,270 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 22:52:52,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:52:52,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:52:52,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-12 22:52:52,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:52:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:52,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:52:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:52:57,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201781877] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:52:57,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:52:57,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-09-12 22:52:57,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083353328] [2024-09-12 22:52:57,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:52:57,965 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-12 22:52:57,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:52:57,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-12 22:52:57,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1066, Invalid=1286, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 22:52:57,967 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) [2024-09-12 22:52:59,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:52:59,531 INFO L93 Difference]: Finished difference Result 107 states and 154 transitions. [2024-09-12 22:52:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-09-12 22:52:59,531 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 [2024-09-12 22:52:59,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:52:59,532 INFO L225 Difference]: With dead ends: 107 [2024-09-12 22:52:59,532 INFO L226 Difference]: Without dead ends: 105 [2024-09-12 22:52:59,536 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3222, Invalid=5334, Unknown=0, NotChecked=0, Total=8556 [2024-09-12 22:52:59,536 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 [2024-09-12 22:52:59,537 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] [2024-09-12 22:52:59,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-09-12 22:52:59,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 60. [2024-09-12 22:52:59,546 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) [2024-09-12 22:52:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2024-09-12 22:52:59,547 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 31 [2024-09-12 22:52:59,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:52:59,547 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2024-09-12 22:52:59,547 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) [2024-09-12 22:52:59,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:59,548 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2024-09-12 22:52:59,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 22:52:59,548 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:52:59,548 INFO L216 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:52:59,564 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-12 22:52:59,749 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 [2024-09-12 22:52:59,749 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:52:59,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:52:59,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1653385770, now seen corresponding path program 4 times [2024-09-12 22:52:59,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:52:59,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247804024] [2024-09-12 22:52:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:52:59,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:52:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:53:00,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:53:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:53:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:53:00,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:53:00,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247804024] [2024-09-12 22:53:00,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247804024] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:53:00,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130825359] [2024-09-12 22:53:00,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:53:00,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:53:00,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:53:00,575 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) [2024-09-12 22:53:00,576 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 22:53:01,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:53:01,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:53:01,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-12 22:53:01,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:53:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:53:01,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:53:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:53:02,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130825359] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:53:02,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:53:02,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-09-12 22:53:02,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797821255] [2024-09-12 22:53:02,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:53:02,154 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 22:53:02,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:53:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 22:53:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 22:53:02,156 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) [2024-09-12 22:53:02,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:53:02,313 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2024-09-12 22:53:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-12 22:53:02,314 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 [2024-09-12 22:53:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:53:02,316 INFO L225 Difference]: With dead ends: 109 [2024-09-12 22:53:02,316 INFO L226 Difference]: Without dead ends: 59 [2024-09-12 22:53:02,317 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 22:53:02,318 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 [2024-09-12 22:53:02,318 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] [2024-09-12 22:53:02,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-12 22:53:02,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-12 22:53:02,331 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) [2024-09-12 22:53:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2024-09-12 22:53:02,334 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 32 [2024-09-12 22:53:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:53:02,336 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2024-09-12 22:53:02,337 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) [2024-09-12 22:53:02,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:53:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2024-09-12 22:53:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-12 22:53:02,338 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:53:02,338 INFO L216 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:53:02,355 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-12 22:53:02,538 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 [2024-09-12 22:53:02,539 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:53:02,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:53:02,539 INFO L85 PathProgramCache]: Analyzing trace with hash -426657273, now seen corresponding path program 5 times [2024-09-12 22:53:02,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:53:02,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359543932] [2024-09-12 22:53:02,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:53:02,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:53:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:53:05,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:53:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:53:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:53:05,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:53:05,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359543932] [2024-09-12 22:53:05,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359543932] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:53:05,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089744098] [2024-09-12 22:53:05,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:53:05,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:53:05,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:53:05,110 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) [2024-09-12 22:53:05,112 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 22:53:06,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-12 22:53:06,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:53:06,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-12 22:53:06,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:53:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:53:06,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:53:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:53:10,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089744098] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:53:10,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:53:10,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-09-12 22:53:10,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980150070] [2024-09-12 22:53:10,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:53:10,007 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-09-12 22:53:10,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:53:10,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-09-12 22:53:10,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4426, Invalid=4886, Unknown=0, NotChecked=0, Total=9312 [2024-09-12 22:53:10,010 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) [2024-09-12 22:53:13,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:53:13,329 INFO L93 Difference]: Finished difference Result 203 states and 298 transitions. [2024-09-12 22:53:13,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2024-09-12 22:53:13,329 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 [2024-09-12 22:53:13,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:53:13,331 INFO L225 Difference]: With dead ends: 203 [2024-09-12 22:53:13,331 INFO L226 Difference]: Without dead ends: 201 [2024-09-12 22:53:13,337 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7521 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=13350, Invalid=22182, Unknown=0, NotChecked=0, Total=35532 [2024-09-12 22:53:13,338 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 [2024-09-12 22:53:13,338 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] [2024-09-12 22:53:13,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-12 22:53:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 108. [2024-09-12 22:53:13,356 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) [2024-09-12 22:53:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 156 transitions. [2024-09-12 22:53:13,356 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 156 transitions. Word has length 55 [2024-09-12 22:53:13,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:53:13,357 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 156 transitions. [2024-09-12 22:53:13,357 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) [2024-09-12 22:53:13,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:53:13,358 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 156 transitions. [2024-09-12 22:53:13,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 22:53:13,360 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:53:13,360 INFO L216 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:53:13,373 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-12 22:53:13,560 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 [2024-09-12 22:53:13,560 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:53:13,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:53:13,561 INFO L85 PathProgramCache]: Analyzing trace with hash -341470506, now seen corresponding path program 5 times [2024-09-12 22:53:13,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:53:13,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001964972] [2024-09-12 22:53:13,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:53:13,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:53:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:53:16,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:53:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:53:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:53:16,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:53:16,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001964972] [2024-09-12 22:53:16,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001964972] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:53:16,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962708210] [2024-09-12 22:53:16,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:53:16,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:53:16,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:53:16,017 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) [2024-09-12 22:53:16,017 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 22:53:17,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-12 22:53:17,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:53:17,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-12 22:53:17,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:53:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:53:17,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:53:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:53:20,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962708210] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:53:20,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:53:20,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 96 [2024-09-12 22:53:20,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806412178] [2024-09-12 22:53:20,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:53:20,586 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-09-12 22:53:20,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:53:20,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-09-12 22:53:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-09-12 22:53:20,589 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) [2024-09-12 22:53:20,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:53:20,816 INFO L93 Difference]: Finished difference Result 205 states and 252 transitions. [2024-09-12 22:53:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-09-12 22:53:20,816 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 [2024-09-12 22:53:20,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:53:20,817 INFO L225 Difference]: With dead ends: 205 [2024-09-12 22:53:20,817 INFO L226 Difference]: Without dead ends: 107 [2024-09-12 22:53:20,818 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-09-12 22:53:20,819 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 [2024-09-12 22:53:20,819 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] [2024-09-12 22:53:20,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-12 22:53:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-09-12 22:53:20,833 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) [2024-09-12 22:53:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2024-09-12 22:53:20,834 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 56 [2024-09-12 22:53:20,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:53:20,834 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2024-09-12 22:53:20,835 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) [2024-09-12 22:53:20,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:53:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2024-09-12 22:53:20,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-12 22:53:20,836 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:53:20,836 INFO L216 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:53:20,851 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-12 22:53:21,037 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 [2024-09-12 22:53:21,037 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:53:21,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:53:21,037 INFO L85 PathProgramCache]: Analyzing trace with hash -146079737, now seen corresponding path program 6 times [2024-09-12 22:53:21,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:53:21,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489640134] [2024-09-12 22:53:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:53:21,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:53:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:53:29,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:53:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:53:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:53:29,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:53:29,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489640134] [2024-09-12 22:53:29,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489640134] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:53:29,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064407173] [2024-09-12 22:53:29,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:53:29,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:53:29,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:53:29,318 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) [2024-09-12 22:53:29,319 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 22:53:33,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2024-09-12 22:53:33,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:53:33,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-09-12 22:53:33,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:53:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:53:34,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:53:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:53:45,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064407173] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:53:45,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:53:45,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2024-09-12 22:53:45,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166880623] [2024-09-12 22:53:45,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:53:45,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-09-12 22:53:45,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:53:45,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-09-12 22:53:45,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18058, Invalid=18998, Unknown=0, NotChecked=0, Total=37056 [2024-09-12 22:53:45,495 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) [2024-09-12 22:53:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:53:58,025 INFO L93 Difference]: Finished difference Result 395 states and 586 transitions. [2024-09-12 22:53:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2024-09-12 22:53:58,025 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 [2024-09-12 22:53:58,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:53:58,027 INFO L225 Difference]: With dead ends: 395 [2024-09-12 22:53:58,027 INFO L226 Difference]: Without dead ends: 393 [2024-09-12 22:53:58,036 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 [2024-09-12 22:53:58,037 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 [2024-09-12 22:53:58,037 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] [2024-09-12 22:53:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2024-09-12 22:53:58,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 204. [2024-09-12 22:53:58,061 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) [2024-09-12 22:53:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 300 transitions. [2024-09-12 22:53:58,062 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 300 transitions. Word has length 103 [2024-09-12 22:53:58,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:53:58,063 INFO L474 AbstractCegarLoop]: Abstraction has 204 states and 300 transitions. [2024-09-12 22:53:58,063 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) [2024-09-12 22:53:58,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:53:58,064 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 300 transitions. [2024-09-12 22:53:58,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 22:53:58,065 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:53:58,065 INFO L216 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:53:58,078 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-12 22:53:58,265 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 [2024-09-12 22:53:58,265 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:53:58,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:53:58,265 INFO L85 PathProgramCache]: Analyzing trace with hash -233501482, now seen corresponding path program 6 times [2024-09-12 22:53:58,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:53:58,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289904853] [2024-09-12 22:53:58,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:53:58,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:53:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:06,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:54:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:54:06,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:54:06,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289904853] [2024-09-12 22:54:06,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289904853] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:54:06,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488389975] [2024-09-12 22:54:06,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:54:06,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:54:06,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:54:06,381 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) [2024-09-12 22:54:06,382 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 22:54:14,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2024-09-12 22:54:14,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:54:14,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-09-12 22:54:14,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:54:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:54:15,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:54:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:54:26,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488389975] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:54:26,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:54:26,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 192 [2024-09-12 22:54:26,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404653328] [2024-09-12 22:54:26,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:54:26,603 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2024-09-12 22:54:26,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:54:26,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2024-09-12 22:54:26,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2024-09-12 22:54:26,608 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) [2024-09-12 22:54:27,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:54:27,631 INFO L93 Difference]: Finished difference Result 397 states and 492 transitions. [2024-09-12 22:54:27,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-09-12 22:54:27,631 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 [2024-09-12 22:54:27,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:54:27,633 INFO L225 Difference]: With dead ends: 397 [2024-09-12 22:54:27,633 INFO L226 Difference]: Without dead ends: 203 [2024-09-12 22:54:27,635 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2024-09-12 22:54:27,635 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 [2024-09-12 22:54:27,635 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] [2024-09-12 22:54:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-09-12 22:54:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2024-09-12 22:54:27,655 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) [2024-09-12 22:54:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2024-09-12 22:54:27,655 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 104 [2024-09-12 22:54:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:54:27,656 INFO L474 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2024-09-12 22:54:27,656 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) [2024-09-12 22:54:27,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2024-09-12 22:54:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2024-09-12 22:54:27,657 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:54:27,657 INFO L216 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:54:27,672 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-12 22:54:27,858 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 [2024-09-12 22:54:27,858 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:54:27,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:27,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1357804537, now seen corresponding path program 7 times [2024-09-12 22:54:27,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:54:27,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493453060] [2024-09-12 22:54:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:54:27,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:54:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:55:01,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:55:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:55:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:55:01,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:55:01,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493453060] [2024-09-12 22:55:01,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493453060] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:55:01,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423493305] [2024-09-12 22:55:01,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:55:01,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:55:01,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:55:01,774 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) [2024-09-12 22:55:01,775 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 22:55:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:55:03,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 383 conjuncts are in the unsatisfiable core [2024-09-12 22:55:03,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:55:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:55:03,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:55:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:55:48,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423493305] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:55:48,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:55:48,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2024-09-12 22:55:48,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352209067] [2024-09-12 22:55:48,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:55:48,617 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-09-12 22:55:48,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:55:48,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-09-12 22:55:48,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72970, Invalid=74870, Unknown=0, NotChecked=0, Total=147840 [2024-09-12 22:55:48,632 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) [2024-09-12 22:56:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:56:41,437 INFO L93 Difference]: Finished difference Result 779 states and 1162 transitions. [2024-09-12 22:56:41,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 574 states. [2024-09-12 22:56:41,437 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 [2024-09-12 22:56:41,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:56:41,441 INFO L225 Difference]: With dead ends: 779 [2024-09-12 22:56:41,441 INFO L226 Difference]: Without dead ends: 777 [2024-09-12 22:56:41,464 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 972 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 763 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126825 ImplicationChecksByTransitivity, 101.2s TimeCoverageRelationStatistics Valid=219270, Invalid=365190, Unknown=0, NotChecked=0, Total=584460 [2024-09-12 22:56:41,464 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 [2024-09-12 22:56:41,464 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] [2024-09-12 22:56:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2024-09-12 22:56:41,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 396. [2024-09-12 22:56:41,508 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) [2024-09-12 22:56:41,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 588 transitions. [2024-09-12 22:56:41,511 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 588 transitions. Word has length 199 [2024-09-12 22:56:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:56:41,511 INFO L474 AbstractCegarLoop]: Abstraction has 396 states and 588 transitions. [2024-09-12 22:56:41,512 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) [2024-09-12 22:56:41,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:56:41,512 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 588 transitions. [2024-09-12 22:56:41,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-09-12 22:56:41,514 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:56:41,514 INFO L216 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:56:41,536 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-12 22:56:41,714 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 [2024-09-12 22:56:41,715 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:56:41,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:56:41,715 INFO L85 PathProgramCache]: Analyzing trace with hash 857735382, now seen corresponding path program 7 times [2024-09-12 22:56:41,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:56:41,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442617532] [2024-09-12 22:56:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:56:41,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:56:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:57:18,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:57:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:57:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:57:18,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:57:18,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442617532] [2024-09-12 22:57:18,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442617532] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:57:18,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114103387] [2024-09-12 22:57:18,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:57:18,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:57:18,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:57:18,689 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:57:18,692 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 22:57:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:57:20,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 383 conjuncts are in the unsatisfiable core [2024-09-12 22:57:20,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:57:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:57:20,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:57:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:57:56,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114103387] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:57:56,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:57:56,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 384 [2024-09-12 22:57:56,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622714007] [2024-09-12 22:57:56,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:57:56,604 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2024-09-12 22:57:56,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:57:56,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2024-09-12 22:57:56,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65661, Invalid=81411, Unknown=0, NotChecked=0, Total=147072 [2024-09-12 22:57:56,623 INFO L87 Difference]: Start difference. First operand 396 states and 588 transitions. Second operand has 384 states, 384 states have (on average 1.0182291666666667) internal successors, (391), 384 states have internal predecessors, (391), 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) [2024-09-12 22:57:58,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:57:58,083 INFO L93 Difference]: Finished difference Result 530 states and 721 transitions. [2024-09-12 22:57:58,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2024-09-12 22:57:58,084 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 384 states have (on average 1.0182291666666667) internal successors, (391), 384 states have internal predecessors, (391), 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 200 [2024-09-12 22:57:58,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:57:58,086 INFO L225 Difference]: With dead ends: 530 [2024-09-12 22:57:58,086 INFO L226 Difference]: Without dead ends: 396 [2024-09-12 22:57:58,092 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23750 ImplicationChecksByTransitivity, 47.4s TimeCoverageRelationStatistics Valid=65661, Invalid=81411, Unknown=0, NotChecked=0, Total=147072 [2024-09-12 22:57:58,093 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 472 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:57:58,093 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 134 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:57:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2024-09-12 22:57:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2024-09-12 22:57:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 391 states have (on average 1.3273657289002558) internal successors, (519), 392 states have internal predecessors, (519), 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) [2024-09-12 22:57:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 522 transitions. [2024-09-12 22:57:58,130 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 522 transitions. Word has length 200 [2024-09-12 22:57:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:57:58,131 INFO L474 AbstractCegarLoop]: Abstraction has 396 states and 522 transitions. [2024-09-12 22:57:58,132 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 384 states have (on average 1.0182291666666667) internal successors, (391), 384 states have internal predecessors, (391), 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) [2024-09-12 22:57:58,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:57:58,132 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 522 transitions. [2024-09-12 22:57:58,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2024-09-12 22:57:58,135 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:57:58,135 INFO L216 NwaCegarLoop]: trace histogram [256, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:57:58,157 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-12 22:57:58,335 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 22:57:58,336 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:57:58,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:57:58,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1735102614, now seen corresponding path program 8 times [2024-09-12 22:57:58,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:57:58,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407874970] [2024-09-12 22:57:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:57:58,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:57:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:58:35,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:58:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:58:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 32896 backedges. 256 proven. 32640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:58:35,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:58:35,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407874970] [2024-09-12 22:58:35,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407874970] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:58:35,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294890382] [2024-09-12 22:58:35,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:58:35,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:58:35,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:58:35,976 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:58:35,978 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-12 22:58:38,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:58:38,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:58:38,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 513 conjuncts are in the unsatisfiable core [2024-09-12 22:58:38,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:59:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 32896 backedges. 256 proven. 32640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:59:36,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:01:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 32896 backedges. 256 proven. 32640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 23:01:29,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294890382] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:01:29,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 23:01:29,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [258, 258, 258] total 769 [2024-09-12 23:01:29,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568900521] [2024-09-12 23:01:29,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 23:01:29,025 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2024-09-12 23:01:29,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:01:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2024-09-12 23:01:29,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34686, Invalid=555906, Unknown=0, NotChecked=0, Total=590592 [2024-09-12 23:01:29,050 INFO L87 Difference]: Start difference. First operand 396 states and 522 transitions. Second operand has 769 states, 769 states have (on average 1.0091027308192457) internal successors, (776), 769 states have internal predecessors, (776), 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) [2024-09-12 23:02:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:02:11,166 INFO L93 Difference]: Finished difference Result 396 states and 522 transitions. [2024-09-12 23:02:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2024-09-12 23:02:11,168 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 1.0091027308192457) internal successors, (776), 769 states have internal predecessors, (776), 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 266 [2024-09-12 23:02:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:02:11,169 INFO L225 Difference]: With dead ends: 396 [2024-09-12 23:02:11,170 INFO L226 Difference]: Without dead ends: 0 [2024-09-12 23:02:11,187 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 767 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97665 ImplicationChecksByTransitivity, 197.3s TimeCoverageRelationStatistics Valid=34686, Invalid=555906, Unknown=0, NotChecked=0, Total=590592 [2024-09-12 23:02:11,187 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 117387 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 117387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.9s IncrementalHoareTripleChecker+Time [2024-09-12 23:02:11,188 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1802 Invalid, 117387 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [0 Valid, 117387 Invalid, 0 Unknown, 0 Unchecked, 37.9s Time] [2024-09-12 23:02:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-12 23:02:11,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-12 23:02:11,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-12 23:02:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-12 23:02:11,189 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 266 [2024-09-12 23:02:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:02:11,189 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-12 23:02:11,190 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 1.0091027308192457) internal successors, (776), 769 states have internal predecessors, (776), 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) [2024-09-12 23:02:11,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:02:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-12 23:02:11,190 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-12 23:02:11,193 INFO L785 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-09-12 23:02:11,193 INFO L785 garLoopResultBuilder]: Registering result SAFE for location mainErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-09-12 23:02:11,211 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-12 23:02:11,397 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 23:02:11,400 INFO L408 BasicCegarLoop]: Path program histogram: [8, 7, 1] [2024-09-12 23:02:11,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-12 23:05:42,605 WARN L293 SmtUtils]: Spent 3.47m on a formula simplification. DAG size of input: 1085 DAG size of output: 1093 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-12 23:05:53,384 WARN L293 SmtUtils]: Spent 10.77s on a formula simplification. DAG size of input: 1480 DAG size of output: 1427 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) Killed by 15