./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.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 ad40c7e9e7b0c80b1cec1e361a82d834fdd8270143479aa0f4bf8bc2b59c2aa5 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 18:36:59,940 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 18:37:00,001 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 18:37:00,008 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 18:37:00,009 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 18:37:00,029 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 18:37:00,029 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 18:37:00,030 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 18:37:00,030 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 18:37:00,031 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 18:37:00,031 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 18:37:00,031 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 18:37:00,032 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 18:37:00,033 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 18:37:00,033 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 18:37:00,035 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 18:37:00,035 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 18:37:00,036 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 18:37:00,036 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 18:37:00,036 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 18:37:00,036 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 18:37:00,040 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 18:37:00,040 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 18:37:00,040 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 18:37:00,041 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 18:37:00,041 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 18:37:00,041 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 18:37:00,041 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 18:37:00,041 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 18:37:00,042 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 18:37:00,042 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 18:37:00,042 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 18:37:00,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:37:00,042 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 18:37:00,043 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 18:37:00,043 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 18:37:00,043 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 18:37:00,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 18:37:00,044 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 18:37:00,044 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 18:37:00,044 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 18:37:00,044 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 18:37:00,045 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad40c7e9e7b0c80b1cec1e361a82d834fdd8270143479aa0f4bf8bc2b59c2aa5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 18:37:00,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 18:37:00,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 18:37:00,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 18:37:00,340 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 18:37:00,340 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 18:37:00,341 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c [2024-09-17 18:37:01,737 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 18:37:01,950 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 18:37:01,951 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c [2024-09-17 18:37:01,960 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/9c9cd8b7c/2d2a9374cef34a64af047b77c7558071/FLAGd7e37c8aa [2024-09-17 18:37:02,351 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/9c9cd8b7c/2d2a9374cef34a64af047b77c7558071 [2024-09-17 18:37:02,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 18:37:02,356 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 18:37:02,359 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 18:37:02,359 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 18:37:02,365 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 18:37:02,365 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:37:02" (1/1) ... [2024-09-17 18:37:02,366 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f8f90c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02, skipping insertion in model container [2024-09-17 18:37:02,366 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:37:02" (1/1) ... [2024-09-17 18:37:02,385 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 18:37:02,534 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c[588,601] [2024-09-17 18:37:02,553 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:37:02,561 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 18:37:02,572 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c[588,601] [2024-09-17 18:37:02,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:37:02,596 INFO L204 MainTranslator]: Completed translation [2024-09-17 18:37:02,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02 WrapperNode [2024-09-17 18:37:02,597 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 18:37:02,598 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 18:37:02,598 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 18:37:02,598 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 18:37:02,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02" (1/1) ... [2024-09-17 18:37:02,614 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02" (1/1) ... [2024-09-17 18:37:02,628 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 18:37:02,628 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 18:37:02,629 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 18:37:02,629 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 18:37:02,629 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 18:37:02,640 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02" (1/1) ... [2024-09-17 18:37:02,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02" (1/1) ... [2024-09-17 18:37:02,642 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02" (1/1) ... [2024-09-17 18:37:02,651 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]. [2024-09-17 18:37:02,652 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02" (1/1) ... [2024-09-17 18:37:02,652 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02" (1/1) ... [2024-09-17 18:37:02,655 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02" (1/1) ... [2024-09-17 18:37:02,658 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02" (1/1) ... [2024-09-17 18:37:02,659 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02" (1/1) ... [2024-09-17 18:37:02,660 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02" (1/1) ... [2024-09-17 18:37:02,661 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 18:37:02,662 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 18:37:02,662 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 18:37:02,662 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 18:37:02,663 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02" (1/1) ... [2024-09-17 18:37:02,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:37:02,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:37:02,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-17 18:37:02,695 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-17 18:37:02,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 18:37:02,738 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-17 18:37:02,738 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-17 18:37:02,738 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 18:37:02,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 18:37:02,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 18:37:02,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 18:37:02,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 18:37:02,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 18:37:02,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 18:37:02,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 18:37:02,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 18:37:02,797 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 18:37:02,799 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 18:37:02,947 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-17 18:37:02,948 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 18:37:02,971 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 18:37:02,973 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-17 18:37:02,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:37:02 BoogieIcfgContainer [2024-09-17 18:37:02,974 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 18:37:02,976 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 18:37:02,978 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 18:37:02,981 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 18:37:02,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 06:37:02" (1/3) ... [2024-09-17 18:37:02,981 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3188ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:37:02, skipping insertion in model container [2024-09-17 18:37:02,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:37:02" (2/3) ... [2024-09-17 18:37:02,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3188ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:37:02, skipping insertion in model container [2024-09-17 18:37:02,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:37:02" (3/3) ... [2024-09-17 18:37:02,983 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound5.c [2024-09-17 18:37:02,998 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 18:37:02,999 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 18:37:03,045 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 18:37:03,050 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;@65302c97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 18:37:03,051 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 18:37:03,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:37:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-17 18:37:03,060 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:37:03,061 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:37:03,061 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:37:03,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:03,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1802650881, now seen corresponding path program 1 times [2024-09-17 18:37:03,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:37:03,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669371581] [2024-09-17 18:37:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:03,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:37:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:37:03,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:37:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:37:03,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:37:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:37:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:37:03,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:37:03,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669371581] [2024-09-17 18:37:03,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669371581] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:37:03,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:37:03,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-17 18:37:03,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402247861] [2024-09-17 18:37:03,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:37:03,259 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-17 18:37:03,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:37:03,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-17 18:37:03,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 18:37:03,284 INFO L87 Difference]: Start difference. First operand has 34 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 18:37:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:37:03,318 INFO L93 Difference]: Finished difference Result 60 states and 98 transitions. [2024-09-17 18:37:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-17 18:37:03,322 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-17 18:37:03,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:37:03,328 INFO L225 Difference]: With dead ends: 60 [2024-09-17 18:37:03,328 INFO L226 Difference]: Without dead ends: 30 [2024-09-17 18:37:03,332 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 18:37:03,337 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:37:03,338 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:37:03,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-17 18:37:03,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-17 18:37:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:37:03,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2024-09-17 18:37:03,381 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 16 [2024-09-17 18:37:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:37:03,381 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2024-09-17 18:37:03,381 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 18:37:03,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:03,384 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2024-09-17 18:37:03,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-17 18:37:03,385 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:37:03,386 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:37:03,387 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 18:37:03,387 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:37:03,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:03,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1133972673, now seen corresponding path program 1 times [2024-09-17 18:37:03,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:37:03,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512109269] [2024-09-17 18:37:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:03,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:37:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:37:03,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:37:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:37:03,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:37:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:37:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:37:03,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:37:03,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512109269] [2024-09-17 18:37:03,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512109269] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:37:03,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:37:03,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:37:03,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765104363] [2024-09-17 18:37:03,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:37:03,682 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:37:03,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:37:03,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:37:03,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:37:03,684 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 18:37:03,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:37:03,821 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2024-09-17 18:37:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:37:03,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-17 18:37:03,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:37:03,823 INFO L225 Difference]: With dead ends: 36 [2024-09-17 18:37:03,825 INFO L226 Difference]: Without dead ends: 34 [2024-09-17 18:37:03,825 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:37:03,826 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:37:03,827 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 110 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:37:03,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-17 18:37:03,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-17 18:37:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:37:03,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-17 18:37:03,847 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 16 [2024-09-17 18:37:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:37:03,849 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-17 18:37:03,849 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 18:37:03,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-17 18:37:03,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-17 18:37:03,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:37:03,850 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:37:03,851 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 18:37:03,851 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:37:03,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:03,851 INFO L85 PathProgramCache]: Analyzing trace with hash -295453008, now seen corresponding path program 1 times [2024-09-17 18:37:03,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:37:03,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641716862] [2024-09-17 18:37:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:03,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:37:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:37:03,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280471254] [2024-09-17 18:37:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:03,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:03,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:37:03,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:37:03,874 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 18:37:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:37:03,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:37:03,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:37:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:37:04,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:37:04,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:37:04,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641716862] [2024-09-17 18:37:04,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:37:04,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280471254] [2024-09-17 18:37:04,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280471254] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:37:04,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:37:04,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:37:04,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819603131] [2024-09-17 18:37:04,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:37:04,025 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:37:04,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:37:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:37:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:37:04,026 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-17 18:37:04,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:37:04,114 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2024-09-17 18:37:04,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:37:04,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-17 18:37:04,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:37:04,117 INFO L225 Difference]: With dead ends: 53 [2024-09-17 18:37:04,117 INFO L226 Difference]: Without dead ends: 51 [2024-09-17 18:37:04,117 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:37:04,118 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:37:04,119 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:37:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-17 18:37:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2024-09-17 18:37:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:37:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2024-09-17 18:37:04,139 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 21 [2024-09-17 18:37:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:37:04,140 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2024-09-17 18:37:04,140 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-17 18:37:04,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2024-09-17 18:37:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-17 18:37:04,141 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:37:04,141 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:37:04,159 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-17 18:37:04,345 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:04,346 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:37:04,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:04,346 INFO L85 PathProgramCache]: Analyzing trace with hash 291539359, now seen corresponding path program 1 times [2024-09-17 18:37:04,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:37:04,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307897102] [2024-09-17 18:37:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:04,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:37:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:37:04,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825996395] [2024-09-17 18:37:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:04,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:04,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:37:04,370 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:37:04,375 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 18:37:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:37:04,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:37:04,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:37:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:37:04,494 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:37:04,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:37:04,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307897102] [2024-09-17 18:37:04,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:37:04,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825996395] [2024-09-17 18:37:04,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825996395] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:37:04,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:37:04,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:37:04,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5916484] [2024-09-17 18:37:04,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:37:04,496 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:37:04,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:37:04,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:37:04,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:37:04,496 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-17 18:37:04,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:37:04,565 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2024-09-17 18:37:04,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:37:04,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-09-17 18:37:04,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:37:04,568 INFO L225 Difference]: With dead ends: 57 [2024-09-17 18:37:04,569 INFO L226 Difference]: Without dead ends: 55 [2024-09-17 18:37:04,569 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:37:04,570 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:37:04,571 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:37:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-17 18:37:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2024-09-17 18:37:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-17 18:37:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2024-09-17 18:37:04,591 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2024-09-17 18:37:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:37:04,592 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2024-09-17 18:37:04,592 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-17 18:37:04,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2024-09-17 18:37:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-17 18:37:04,593 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:37:04,594 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:37:04,611 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 18:37:04,794 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:04,795 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:37:04,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:04,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1228581936, now seen corresponding path program 1 times [2024-09-17 18:37:04,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:37:04,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079065801] [2024-09-17 18:37:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:04,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:37:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:37:04,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40790748] [2024-09-17 18:37:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:04,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:04,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:37:04,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:37:04,831 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 18:37:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:37:04,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:37:04,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:37:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:37:04,957 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:37:04,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:37:04,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079065801] [2024-09-17 18:37:04,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:37:04,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40790748] [2024-09-17 18:37:04,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40790748] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:37:04,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:37:04,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:37:04,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681857432] [2024-09-17 18:37:04,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:37:04,961 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:37:04,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:37:04,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:37:04,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:37:04,961 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:37:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:37:05,054 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-09-17 18:37:05,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:37:05,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-09-17 18:37:05,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:37:05,056 INFO L225 Difference]: With dead ends: 65 [2024-09-17 18:37:05,056 INFO L226 Difference]: Without dead ends: 53 [2024-09-17 18:37:05,057 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:37:05,058 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:37:05,060 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:37:05,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-17 18:37:05,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-17 18:37:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-17 18:37:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-17 18:37:05,077 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 31 [2024-09-17 18:37:05,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:37:05,078 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-17 18:37:05,078 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:37:05,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:05,079 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-17 18:37:05,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-17 18:37:05,081 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:37:05,081 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:37:05,096 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-17 18:37:05,281 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:05,282 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:37:05,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:05,282 INFO L85 PathProgramCache]: Analyzing trace with hash 149987423, now seen corresponding path program 1 times [2024-09-17 18:37:05,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:37:05,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471154246] [2024-09-17 18:37:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:05,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:37:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:37:05,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221659510] [2024-09-17 18:37:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:05,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:05,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:37:05,330 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:37:05,331 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 18:37:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:37:05,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-17 18:37:05,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:37:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-17 18:37:05,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:37:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-17 18:37:05,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:37:05,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471154246] [2024-09-17 18:37:05,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:37:05,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221659510] [2024-09-17 18:37:05,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221659510] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:37:05,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:37:05,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-17 18:37:05,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835013381] [2024-09-17 18:37:05,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:37:05,753 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-17 18:37:05,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:37:05,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-17 18:37:05,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:37:05,755 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2024-09-17 18:37:06,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:37:06,030 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2024-09-17 18:37:06,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:37:06,031 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 48 [2024-09-17 18:37:06,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:37:06,032 INFO L225 Difference]: With dead ends: 76 [2024-09-17 18:37:06,034 INFO L226 Difference]: Without dead ends: 74 [2024-09-17 18:37:06,035 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-09-17 18:37:06,036 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:37:06,036 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 133 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:37:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-17 18:37:06,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2024-09-17 18:37:06,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-17 18:37:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2024-09-17 18:37:06,066 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 48 [2024-09-17 18:37:06,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:37:06,067 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2024-09-17 18:37:06,068 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2024-09-17 18:37:06,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:06,068 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2024-09-17 18:37:06,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-17 18:37:06,070 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:37:06,070 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:37:06,086 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-17 18:37:06,272 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:06,273 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:37:06,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:06,273 INFO L85 PathProgramCache]: Analyzing trace with hash -883401392, now seen corresponding path program 2 times [2024-09-17 18:37:06,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:37:06,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993040657] [2024-09-17 18:37:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:06,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:37:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:37:06,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796675019] [2024-09-17 18:37:06,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:37:06,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:06,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:37:06,317 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:37:06,319 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 18:37:06,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:37:06,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:37:06,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-17 18:37:06,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:37:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-17 18:37:06,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:37:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-17 18:37:06,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:37:06,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993040657] [2024-09-17 18:37:06,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:37:06,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796675019] [2024-09-17 18:37:06,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796675019] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:37:06,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:37:06,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-17 18:37:06,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056660430] [2024-09-17 18:37:06,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:37:06,659 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-17 18:37:06,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:37:06,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-17 18:37:06,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:37:06,673 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-17 18:37:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:37:06,918 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2024-09-17 18:37:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-17 18:37:06,918 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 53 [2024-09-17 18:37:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:37:06,920 INFO L225 Difference]: With dead ends: 88 [2024-09-17 18:37:06,920 INFO L226 Difference]: Without dead ends: 86 [2024-09-17 18:37:06,920 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-09-17 18:37:06,921 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:37:06,921 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:37:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-17 18:37:06,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2024-09-17 18:37:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 43 states have (on average 1.069767441860465) internal successors, (46), 45 states have internal predecessors, (46), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:37:06,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2024-09-17 18:37:06,948 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 53 [2024-09-17 18:37:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:37:06,949 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2024-09-17 18:37:06,949 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-17 18:37:06,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2024-09-17 18:37:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-17 18:37:06,952 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:37:06,952 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:37:06,968 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-17 18:37:07,155 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-17 18:37:07,156 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:37:07,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:07,156 INFO L85 PathProgramCache]: Analyzing trace with hash -607967553, now seen corresponding path program 3 times [2024-09-17 18:37:07,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:37:07,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134177408] [2024-09-17 18:37:07,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:07,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:37:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:37:07,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556603047] [2024-09-17 18:37:07,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:37:07,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:07,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:37:07,179 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:37:07,180 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 18:37:07,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-17 18:37:07,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:37:07,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 18:37:07,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:37:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:37:07,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:37:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:37:07,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:37:07,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134177408] [2024-09-17 18:37:07,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:37:07,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556603047] [2024-09-17 18:37:07,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556603047] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:37:07,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:37:07,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-09-17 18:37:07,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913132349] [2024-09-17 18:37:07,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:37:07,526 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-17 18:37:07,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:37:07,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-17 18:37:07,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-17 18:37:07,527 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-09-17 18:37:07,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:37:07,814 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2024-09-17 18:37:07,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:37:07,815 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 58 [2024-09-17 18:37:07,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:37:07,817 INFO L225 Difference]: With dead ends: 96 [2024-09-17 18:37:07,817 INFO L226 Difference]: Without dead ends: 84 [2024-09-17 18:37:07,818 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-09-17 18:37:07,820 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:37:07,820 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 205 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:37:07,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-17 18:37:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2024-09-17 18:37:07,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 16 states have call successors, (16), 14 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:37:07,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2024-09-17 18:37:07,857 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 58 [2024-09-17 18:37:07,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:37:07,859 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2024-09-17 18:37:07,859 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-09-17 18:37:07,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:07,860 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2024-09-17 18:37:07,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-17 18:37:07,861 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:37:07,861 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:37:07,878 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-17 18:37:08,065 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:08,066 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:37:08,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:08,066 INFO L85 PathProgramCache]: Analyzing trace with hash -612037408, now seen corresponding path program 1 times [2024-09-17 18:37:08,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:37:08,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507342258] [2024-09-17 18:37:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:08,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:37:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:37:08,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737757648] [2024-09-17 18:37:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:08,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:08,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:37:08,106 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:37:08,109 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 18:37:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:37:08,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 18:37:08,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:37:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:37:08,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:37:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:37:08,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:37:08,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507342258] [2024-09-17 18:37:08,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:37:08,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737757648] [2024-09-17 18:37:08,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737757648] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:37:08,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:37:08,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-17 18:37:08,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252962842] [2024-09-17 18:37:08,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:37:08,870 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-17 18:37:08,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:37:08,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-17 18:37:08,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-17 18:37:08,871 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-17 18:37:09,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:37:09,123 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2024-09-17 18:37:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:37:09,123 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 74 [2024-09-17 18:37:09,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:37:09,126 INFO L225 Difference]: With dead ends: 104 [2024-09-17 18:37:09,127 INFO L226 Difference]: Without dead ends: 102 [2024-09-17 18:37:09,128 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:37:09,128 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:37:09,129 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 171 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:37:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-17 18:37:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-09-17 18:37:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 56 states have internal predecessors, (58), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:37:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2024-09-17 18:37:09,171 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 74 [2024-09-17 18:37:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:37:09,172 INFO L474 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2024-09-17 18:37:09,172 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-17 18:37:09,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2024-09-17 18:37:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-17 18:37:09,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:37:09,177 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:37:09,197 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-17 18:37:09,380 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:09,381 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:37:09,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:09,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1655042001, now seen corresponding path program 1 times [2024-09-17 18:37:09,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:37:09,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419712981] [2024-09-17 18:37:09,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:09,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:37:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:37:09,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099045985] [2024-09-17 18:37:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:09,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:09,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:37:09,406 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:37:09,407 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 18:37:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:37:09,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 18:37:09,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:37:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:37:09,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:37:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:37:09,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:37:09,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419712981] [2024-09-17 18:37:09,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:37:09,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099045985] [2024-09-17 18:37:09,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099045985] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:37:09,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:37:09,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2024-09-17 18:37:09,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724119441] [2024-09-17 18:37:09,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:37:09,917 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 18:37:09,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:37:09,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 18:37:09,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-09-17 18:37:09,918 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2024-09-17 18:37:10,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:37:10,258 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2024-09-17 18:37:10,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 18:37:10,259 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) Word has length 79 [2024-09-17 18:37:10,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:37:10,260 INFO L225 Difference]: With dead ends: 116 [2024-09-17 18:37:10,260 INFO L226 Difference]: Without dead ends: 96 [2024-09-17 18:37:10,261 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:37:10,261 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:37:10,262 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 240 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:37:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-17 18:37:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-09-17 18:37:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:37:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2024-09-17 18:37:10,295 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 79 [2024-09-17 18:37:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:37:10,295 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2024-09-17 18:37:10,295 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2024-09-17 18:37:10,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2024-09-17 18:37:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:37:10,297 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:37:10,297 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:37:10,314 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-17 18:37:10,498 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:10,498 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:37:10,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:10,499 INFO L85 PathProgramCache]: Analyzing trace with hash 2107835968, now seen corresponding path program 2 times [2024-09-17 18:37:10,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:37:10,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198864791] [2024-09-17 18:37:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:10,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:37:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:37:10,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125165832] [2024-09-17 18:37:10,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:37:10,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:10,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:37:10,540 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:37:10,542 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 18:37:10,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:37:10,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:37:10,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-17 18:37:10,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:37:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 86 proven. 58 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-09-17 18:37:10,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:37:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2024-09-17 18:37:11,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:37:11,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198864791] [2024-09-17 18:37:11,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:37:11,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125165832] [2024-09-17 18:37:11,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125165832] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:37:11,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:37:11,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-09-17 18:37:11,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453730455] [2024-09-17 18:37:11,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:37:11,739 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 18:37:11,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:37:11,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 18:37:11,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-17 18:37:11,740 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-17 18:37:12,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:37:12,361 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2024-09-17 18:37:12,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 18:37:12,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) Word has length 128 [2024-09-17 18:37:12,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:37:12,364 INFO L225 Difference]: With dead ends: 118 [2024-09-17 18:37:12,365 INFO L226 Difference]: Without dead ends: 114 [2024-09-17 18:37:12,365 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:37:12,366 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:37:12,366 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 277 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 18:37:12,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-17 18:37:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2024-09-17 18:37:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 32 states have call successors, (32), 18 states have call predecessors, (32), 16 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:37:12,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2024-09-17 18:37:12,418 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 128 [2024-09-17 18:37:12,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:37:12,418 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2024-09-17 18:37:12,418 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-17 18:37:12,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:12,419 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2024-09-17 18:37:12,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-17 18:37:12,420 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:37:12,421 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:37:12,438 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-17 18:37:12,624 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-17 18:37:12,625 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:37:12,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:12,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1340142287, now seen corresponding path program 2 times [2024-09-17 18:37:12,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:37:12,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929515294] [2024-09-17 18:37:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:37:12,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:37:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:37:12,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894478603] [2024-09-17 18:37:12,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:37:12,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:37:12,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:37:12,670 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:37:12,673 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 18:37:12,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:37:12,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:37:12,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-17 18:37:12,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:37:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 88 proven. 61 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2024-09-17 18:37:12,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:37:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 88 proven. 40 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2024-09-17 18:37:14,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:37:14,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929515294] [2024-09-17 18:37:14,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:37:14,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894478603] [2024-09-17 18:37:14,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894478603] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:37:14,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:37:14,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2024-09-17 18:37:14,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593236316] [2024-09-17 18:37:14,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:37:14,067 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-17 18:37:14,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:37:14,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-17 18:37:14,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-09-17 18:37:14,068 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 10 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) [2024-09-17 18:37:14,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:37:14,526 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2024-09-17 18:37:14,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 18:37:14,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 10 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) Word has length 133 [2024-09-17 18:37:14,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:37:14,527 INFO L225 Difference]: With dead ends: 126 [2024-09-17 18:37:14,527 INFO L226 Difference]: Without dead ends: 0 [2024-09-17 18:37:14,527 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 248 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2024-09-17 18:37:14,528 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:37:14,528 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 254 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:37:14,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-17 18:37:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-17 18:37:14,529 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) [2024-09-17 18:37:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-17 18:37:14,529 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 133 [2024-09-17 18:37:14,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:37:14,529 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-17 18:37:14,529 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 10 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) [2024-09-17 18:37:14,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:37:14,530 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-17 18:37:14,530 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-17 18:37:14,532 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-17 18:37:14,544 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-17 18:37:14,732 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-17 18:37:14,735 INFO L408 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1] [2024-09-17 18:37:14,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-17 18:37:16,919 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-17 18:37:16,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 06:37:16 BoogieIcfgContainer [2024-09-17 18:37:16,943 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-17 18:37:16,944 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-17 18:37:16,944 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-17 18:37:16,944 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-17 18:37:16,944 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:37:02" (3/4) ... [2024-09-17 18:37:16,946 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-17 18:37:16,998 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-17 18:37:16,998 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-17 18:37:16,999 INFO L158 Benchmark]: Toolchain (without parser) took 14642.52ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 125.6MB in the beginning and 151.6MB in the end (delta: -26.0MB). Peak memory consumption was 10.4MB. Max. memory is 16.1GB. [2024-09-17 18:37:16,999 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 109.1MB. Free memory is still 81.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 18:37:17,000 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.22ms. Allocated memory is still 159.4MB. Free memory was 125.6MB in the beginning and 113.7MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-17 18:37:17,000 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.46ms. Allocated memory is still 159.4MB. Free memory was 113.7MB in the beginning and 113.0MB in the end (delta: 702.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 18:37:17,000 INFO L158 Benchmark]: Boogie Preprocessor took 32.49ms. Allocated memory is still 159.4MB. Free memory was 113.0MB in the beginning and 110.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 18:37:17,001 INFO L158 Benchmark]: RCFGBuilder took 312.42ms. Allocated memory is still 159.4MB. Free memory was 110.9MB in the beginning and 97.0MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-17 18:37:17,002 INFO L158 Benchmark]: TraceAbstraction took 13966.89ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 96.3MB in the beginning and 153.7MB in the end (delta: -57.4MB). Peak memory consumption was 80.6MB. Max. memory is 16.1GB. [2024-09-17 18:37:17,002 INFO L158 Benchmark]: Witness Printer took 54.71ms. Allocated memory is still 192.9MB. Free memory was 153.7MB in the beginning and 151.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 18:37:17,004 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 109.1MB. Free memory is still 81.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 238.22ms. Allocated memory is still 159.4MB. Free memory was 125.6MB in the beginning and 113.7MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.46ms. Allocated memory is still 159.4MB. Free memory was 113.7MB in the beginning and 113.0MB in the end (delta: 702.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.49ms. Allocated memory is still 159.4MB. Free memory was 113.0MB in the beginning and 110.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 312.42ms. Allocated memory is still 159.4MB. Free memory was 110.9MB in the beginning and 97.0MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 13966.89ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 96.3MB in the beginning and 153.7MB in the end (delta: -57.4MB). Peak memory consumption was 80.6MB. Max. memory is 16.1GB. * Witness Printer took 54.71ms. Allocated memory is still 192.9MB. Free memory was 153.7MB in the beginning and 151.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.7s, OverallIterations: 12, TraceHistogramMax: 23, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 134 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 86 mSDsluCounter, 1967 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1539 mSDsCounter, 285 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1326 IncrementalHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 285 mSolverCounterUnsat, 428 mSDtfsCounter, 1326 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1264 GetRequests, 1134 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=11, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 47 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 1334 NumberOfCodeBlocks, 1304 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1237 ConstructedInterpolants, 0 QuantifiedInterpolants, 4768 SizeOfPredicates, 19 NumberOfNonLiveVariables, 1467 ConjunctsInSsa, 206 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 5309/5604 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((((((((3 * ((__int128) n * n)) + (((__int128) n * n) * n)) + ((__int128) n * 3)) + 1) == ((__int128) y + x)) && ((((__int128) n * 6) + 6) == z)) && (0 <= a)) && ((((__int128) n * n) * n) == x)) && ((n < (a + 1)) || (((__int128) z * x) == (((__int128) x * 12) + (((__int128) a * x) * 6))))) && (a <= 5)) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-17 18:37:17,026 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE