./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-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/hard-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 a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 --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 [2024-09-18 16:21:31,421 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:21:31,487 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:21:31,490 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:21:31,490 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:21:31,514 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:21:31,514 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:21:31,515 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:21:31,515 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:21:31,516 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:21:31,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:21:31,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:21:31,517 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:21:31,518 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:21:31,518 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:21:31,519 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:21:31,519 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:21:31,519 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:21:31,519 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:21:31,519 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:21:31,519 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:21:31,520 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:21:31,520 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:21:31,522 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:21:31,523 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:21:31,523 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:21:31,523 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:21:31,523 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:21:31,523 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:21:31,523 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:21:31,523 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:21:31,524 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:21:31,524 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:21:31,524 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:21:31,524 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:21:31,524 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:21:31,524 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:21:31,524 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:21:31,525 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:21:31,525 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:21:31,525 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:21:31,526 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:21:31,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:21:31,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:21:31,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:21:31,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:21:31,744 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:21:31,744 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:21:31,745 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2024-09-18 16:21:32,915 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:21:33,054 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:21:33,054 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2024-09-18 16:21:33,061 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/67f0a6498/a93ae7ecb35c4675b420b6fb626a0fc3/FLAGfe74508ef [2024-09-18 16:21:33,478 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/67f0a6498/a93ae7ecb35c4675b420b6fb626a0fc3 [2024-09-18 16:21:33,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:21:33,481 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:21:33,482 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:21:33,482 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:21:33,486 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:21:33,487 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:21:33" (1/1) ... [2024-09-18 16:21:33,488 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1fe098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33, skipping insertion in model container [2024-09-18 16:21:33,489 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:21:33" (1/1) ... [2024-09-18 16:21:33,503 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:21:33,625 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/hard-ll_valuebound5.c[538,551] [2024-09-18 16:21:33,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:21:33,661 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:21:33,672 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/hard-ll_valuebound5.c[538,551] [2024-09-18 16:21:33,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:21:33,697 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:21:33,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33 WrapperNode [2024-09-18 16:21:33,698 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:21:33,699 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:21:33,699 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:21:33,699 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:21:33,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33" (1/1) ... [2024-09-18 16:21:33,709 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33" (1/1) ... [2024-09-18 16:21:33,714 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:21:33,714 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:21:33,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:21:33,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:21:33,715 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:21:33,723 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33" (1/1) ... [2024-09-18 16:21:33,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33" (1/1) ... [2024-09-18 16:21:33,724 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33" (1/1) ... [2024-09-18 16:21:33,732 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]. [2024-09-18 16:21:33,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33" (1/1) ... [2024-09-18 16:21:33,733 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33" (1/1) ... [2024-09-18 16:21:33,735 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33" (1/1) ... [2024-09-18 16:21:33,737 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33" (1/1) ... [2024-09-18 16:21:33,738 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33" (1/1) ... [2024-09-18 16:21:33,739 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33" (1/1) ... [2024-09-18 16:21:33,740 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:21:33,741 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:21:33,741 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:21:33,741 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:21:33,741 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33" (1/1) ... [2024-09-18 16:21:33,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:21:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:21:33,767 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) [2024-09-18 16:21:33,770 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 [2024-09-18 16:21:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:21:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 16:21:33,808 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 16:21:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:21:33,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:21:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:21:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:21:33,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:21:33,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:21:33,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:21:33,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:21:33,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:21:33,858 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:21:33,860 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:21:33,985 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-18 16:21:33,986 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:21:33,999 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:21:34,000 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-18 16:21:34,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:21:34 BoogieIcfgContainer [2024-09-18 16:21:34,000 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:21:34,002 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:21:34,002 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:21:34,004 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:21:34,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:21:33" (1/3) ... [2024-09-18 16:21:34,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7701b6b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:21:34, skipping insertion in model container [2024-09-18 16:21:34,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:21:33" (2/3) ... [2024-09-18 16:21:34,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7701b6b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:21:34, skipping insertion in model container [2024-09-18 16:21:34,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:21:34" (3/3) ... [2024-09-18 16:21:34,006 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.c [2024-09-18 16:21:34,019 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:21:34,019 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:21:34,063 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:21:34,068 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;@3796348d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:21:34,068 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:21:34,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-18 16:21:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 16:21:34,077 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:21:34,077 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:21:34,078 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:21:34,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:34,082 INFO L85 PathProgramCache]: Analyzing trace with hash 367441184, now seen corresponding path program 1 times [2024-09-18 16:21:34,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:21:34,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922873882] [2024-09-18 16:21:34,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:34,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:21:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:21:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:21:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:21:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:21:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:21:34,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:21:34,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922873882] [2024-09-18 16:21:34,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922873882] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:21:34,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:21:34,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 16:21:34,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057969942] [2024-09-18 16:21:34,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:21:34,252 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 16:21:34,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:21:34,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 16:21:34,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:21:34,273 INFO L87 Difference]: Start difference. First operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:21:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:21:34,294 INFO L93 Difference]: Finished difference Result 66 states and 107 transitions. [2024-09-18 16:21:34,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 16:21:34,296 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-18 16:21:34,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:21:34,301 INFO L225 Difference]: With dead ends: 66 [2024-09-18 16:21:34,301 INFO L226 Difference]: Without dead ends: 32 [2024-09-18 16:21:34,303 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:21:34,306 INFO L434 NwaCegarLoop]: 44 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, 44 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 [2024-09-18 16:21:34,307 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:21:34,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-18 16:21:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-18 16:21:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 16:21:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-09-18 16:21:34,336 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 27 [2024-09-18 16:21:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:21:34,336 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-09-18 16:21:34,336 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:21:34,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-09-18 16:21:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 16:21:34,346 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:21:34,349 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:21:34,349 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:21:34,349 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:21:34,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:34,350 INFO L85 PathProgramCache]: Analyzing trace with hash -781266146, now seen corresponding path program 1 times [2024-09-18 16:21:34,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:21:34,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639330450] [2024-09-18 16:21:34,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:34,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:21:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:21:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:21:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:21:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:21:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:21:34,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:21:34,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639330450] [2024-09-18 16:21:34,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639330450] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:21:34,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:21:34,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:21:34,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228477668] [2024-09-18 16:21:34,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:21:34,579 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:21:34,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:21:34,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:21:34,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:21:34,580 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-18 16:21:34,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:21:34,666 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-09-18 16:21:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:21:34,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-18 16:21:34,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:21:34,668 INFO L225 Difference]: With dead ends: 45 [2024-09-18 16:21:34,668 INFO L226 Difference]: Without dead ends: 43 [2024-09-18 16:21:34,669 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:21:34,670 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:21:34,671 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 134 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:21:34,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-18 16:21:34,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-09-18 16:21:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 16:21:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-18 16:21:34,682 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 27 [2024-09-18 16:21:34,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:21:34,682 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-18 16:21:34,683 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-18 16:21:34,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:34,684 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-18 16:21:34,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 16:21:34,685 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:21:34,685 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:21:34,685 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 16:21:34,686 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:21:34,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:34,687 INFO L85 PathProgramCache]: Analyzing trace with hash 992341126, now seen corresponding path program 1 times [2024-09-18 16:21:34,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:21:34,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681066430] [2024-09-18 16:21:34,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:34,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:21:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:21:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:21:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:21:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:21:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:21:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:21:34,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:21:34,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681066430] [2024-09-18 16:21:34,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681066430] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:21:34,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:21:34,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:21:34,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076024891] [2024-09-18 16:21:34,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:21:34,805 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:21:34,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:21:34,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:21:34,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:21:34,809 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-09-18 16:21:34,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:21:34,869 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-09-18 16:21:34,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:21:34,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 32 [2024-09-18 16:21:34,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:21:34,870 INFO L225 Difference]: With dead ends: 49 [2024-09-18 16:21:34,870 INFO L226 Difference]: Without dead ends: 47 [2024-09-18 16:21:34,870 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:21:34,871 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:21:34,871 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:21:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-18 16:21:34,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-09-18 16:21:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 16:21:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-18 16:21:34,878 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 32 [2024-09-18 16:21:34,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:21:34,878 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-18 16:21:34,879 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-09-18 16:21:34,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:34,879 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-18 16:21:34,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-18 16:21:34,880 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:21:34,880 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:21:34,880 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 16:21:34,881 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:21:34,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1500804130, now seen corresponding path program 1 times [2024-09-18 16:21:34,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:21:34,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971102149] [2024-09-18 16:21:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:34,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:21:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:21:34,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486245140] [2024-09-18 16:21:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:34,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:34,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:21:34,910 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) [2024-09-18 16:21:34,911 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:21:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:34,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 16:21:34,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:21:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 16:21:35,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:21:35,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:21:35,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971102149] [2024-09-18 16:21:35,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:21:35,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486245140] [2024-09-18 16:21:35,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486245140] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:21:35,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:21:35,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:21:35,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977515883] [2024-09-18 16:21:35,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:21:35,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:21:35,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:21:35,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:21:35,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:21:35,049 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-18 16:21:35,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:21:35,115 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2024-09-18 16:21:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:21:35,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-18 16:21:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:21:35,117 INFO L225 Difference]: With dead ends: 66 [2024-09-18 16:21:35,119 INFO L226 Difference]: Without dead ends: 53 [2024-09-18 16:21:35,119 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:21:35,120 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:21:35,121 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:21:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-18 16:21:35,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-18 16:21:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-18 16:21:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-09-18 16:21:35,132 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 37 [2024-09-18 16:21:35,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:21:35,132 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-09-18 16:21:35,132 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-18 16:21:35,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:35,132 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-09-18 16:21:35,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-18 16:21:35,133 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:21:35,133 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:21:35,146 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 16:21:35,341 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:35,342 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:21:35,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:35,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1357220557, now seen corresponding path program 1 times [2024-09-18 16:21:35,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:21:35,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187883244] [2024-09-18 16:21:35,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:35,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:21:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:21:35,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553151771] [2024-09-18 16:21:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:35,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:35,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:21:35,360 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) [2024-09-18 16:21:35,361 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:21:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:35,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-18 16:21:35,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:21:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-18 16:21:35,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:21:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-18 16:21:35,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:21:35,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187883244] [2024-09-18 16:21:35,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:21:35,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553151771] [2024-09-18 16:21:35,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553151771] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:21:35,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:21:35,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-18 16:21:35,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901362147] [2024-09-18 16:21:35,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:21:35,691 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-18 16:21:35,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:21:35,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-18 16:21:35,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-18 16:21:35,693 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-18 16:21:35,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:21:35,782 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2024-09-18 16:21:35,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 16:21:35,783 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 44 [2024-09-18 16:21:35,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:21:35,785 INFO L225 Difference]: With dead ends: 68 [2024-09-18 16:21:35,785 INFO L226 Difference]: Without dead ends: 66 [2024-09-18 16:21:35,785 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:21:35,786 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:21:35,786 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:21:35,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-18 16:21:35,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-09-18 16:21:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-18 16:21:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2024-09-18 16:21:35,798 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 44 [2024-09-18 16:21:35,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:21:35,798 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2024-09-18 16:21:35,798 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-18 16:21:35,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2024-09-18 16:21:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-18 16:21:35,800 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:21:35,800 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:21:35,812 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 16:21:36,004 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:36,005 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:21:36,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:36,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1728018148, now seen corresponding path program 1 times [2024-09-18 16:21:36,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:21:36,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309863269] [2024-09-18 16:21:36,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:36,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:21:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:21:36,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090308453] [2024-09-18 16:21:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:36,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:36,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:21:36,020 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) [2024-09-18 16:21:36,022 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:21:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:36,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 16:21:36,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:21:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-18 16:21:36,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:21:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-18 16:21:36,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:21:36,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309863269] [2024-09-18 16:21:36,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:21:36,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090308453] [2024-09-18 16:21:36,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090308453] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-18 16:21:36,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:21:36,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-18 16:21:36,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333676920] [2024-09-18 16:21:36,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:21:36,229 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:21:36,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:21:36,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:21:36,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-18 16:21:36,230 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-18 16:21:36,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:21:36,291 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2024-09-18 16:21:36,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:21:36,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2024-09-18 16:21:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:21:36,293 INFO L225 Difference]: With dead ends: 73 [2024-09-18 16:21:36,293 INFO L226 Difference]: Without dead ends: 71 [2024-09-18 16:21:36,294 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-18 16:21:36,294 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:21:36,294 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 125 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:21:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-18 16:21:36,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-09-18 16:21:36,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-18 16:21:36,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2024-09-18 16:21:36,306 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 54 [2024-09-18 16:21:36,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:21:36,307 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2024-09-18 16:21:36,308 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-18 16:21:36,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:36,308 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2024-09-18 16:21:36,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-18 16:21:36,310 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:21:36,310 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:21:36,322 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-18 16:21:36,511 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-18 16:21:36,512 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:21:36,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:36,513 INFO L85 PathProgramCache]: Analyzing trace with hash 515743006, now seen corresponding path program 1 times [2024-09-18 16:21:36,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:21:36,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993484978] [2024-09-18 16:21:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:36,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:21:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:36,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:21:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:36,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:21:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:36,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:21:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:36,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:21:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:36,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:21:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:36,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 16:21:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:36,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:21:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:36,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 16:21:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:36,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 16:21:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:36,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-18 16:21:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-18 16:21:36,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:21:36,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993484978] [2024-09-18 16:21:36,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993484978] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:21:36,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:21:36,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:21:36,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93754621] [2024-09-18 16:21:36,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:21:36,631 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:21:36,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:21:36,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:21:36,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:21:36,634 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-18 16:21:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:21:36,692 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2024-09-18 16:21:36,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:21:36,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2024-09-18 16:21:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:21:36,693 INFO L225 Difference]: With dead ends: 78 [2024-09-18 16:21:36,693 INFO L226 Difference]: Without dead ends: 66 [2024-09-18 16:21:36,693 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 [2024-09-18 16:21:36,694 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:21:36,694 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:21:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-18 16:21:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-18 16:21:36,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-18 16:21:36,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2024-09-18 16:21:36,713 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 60 [2024-09-18 16:21:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:21:36,713 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2024-09-18 16:21:36,713 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-18 16:21:36,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:36,713 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2024-09-18 16:21:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-18 16:21:36,716 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:21:36,716 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 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, 1, 1] [2024-09-18 16:21:36,717 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-18 16:21:36,717 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:21:36,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:36,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1452252536, now seen corresponding path program 1 times [2024-09-18 16:21:36,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:21:36,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249108994] [2024-09-18 16:21:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:36,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:21:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:21:36,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649662840] [2024-09-18 16:21:36,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:36,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:36,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:21:36,751 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) [2024-09-18 16:21:36,752 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:21:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:36,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-18 16:21:36,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:21:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-09-18 16:21:37,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:21:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-18 16:21:38,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:21:38,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249108994] [2024-09-18 16:21:38,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:21:38,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649662840] [2024-09-18 16:21:38,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649662840] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:21:38,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:21:38,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-09-18 16:21:38,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76150264] [2024-09-18 16:21:38,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:21:38,603 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-18 16:21:38,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:21:38,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-18 16:21:38,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-09-18 16:21:38,604 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-18 16:21:39,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:21:39,475 INFO L93 Difference]: Finished difference Result 153 states and 210 transitions. [2024-09-18 16:21:39,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 16:21:39,475 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 74 [2024-09-18 16:21:39,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:21:39,477 INFO L225 Difference]: With dead ends: 153 [2024-09-18 16:21:39,477 INFO L226 Difference]: Without dead ends: 130 [2024-09-18 16:21:39,478 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-09-18 16:21:39,478 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 79 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 16:21:39,478 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 256 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 16:21:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-18 16:21:39,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2024-09-18 16:21:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 61 states have (on average 1.180327868852459) internal successors, (72), 65 states have internal predecessors, (72), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-18 16:21:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2024-09-18 16:21:39,506 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 74 [2024-09-18 16:21:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:21:39,506 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2024-09-18 16:21:39,506 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-18 16:21:39,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2024-09-18 16:21:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-18 16:21:39,510 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:21:39,510 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 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, 1] [2024-09-18 16:21:39,521 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 16:21:39,713 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:39,714 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:21:39,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:39,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1571705391, now seen corresponding path program 1 times [2024-09-18 16:21:39,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:21:39,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610055049] [2024-09-18 16:21:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:39,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:21:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:21:39,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509198453] [2024-09-18 16:21:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:39,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:39,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:21:39,733 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) [2024-09-18 16:21:39,734 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 16:21:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:39,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-18 16:21:39,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:21:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-09-18 16:21:40,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:21:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-18 16:21:40,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:21:40,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610055049] [2024-09-18 16:21:40,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:21:40,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509198453] [2024-09-18 16:21:40,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509198453] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:21:40,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:21:40,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-09-18 16:21:40,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380783674] [2024-09-18 16:21:40,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:21:40,561 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-18 16:21:40,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:21:40,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-18 16:21:40,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-18 16:21:40,562 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-18 16:21:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:21:40,997 INFO L93 Difference]: Finished difference Result 145 states and 180 transitions. [2024-09-18 16:21:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 16:21:40,998 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 85 [2024-09-18 16:21:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:21:40,999 INFO L225 Difference]: With dead ends: 145 [2024-09-18 16:21:40,999 INFO L226 Difference]: Without dead ends: 111 [2024-09-18 16:21:40,999 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-09-18 16:21:41,000 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 25 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:21:41,000 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 414 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 16:21:41,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-18 16:21:41,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2024-09-18 16:21:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 59 states have internal predecessors, (66), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-18 16:21:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2024-09-18 16:21:41,031 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 85 [2024-09-18 16:21:41,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:21:41,031 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2024-09-18 16:21:41,031 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-18 16:21:41,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2024-09-18 16:21:41,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-18 16:21:41,033 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:21:41,033 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 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] [2024-09-18 16:21:41,046 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-18 16:21:41,234 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:41,234 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:21:41,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:41,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1973508941, now seen corresponding path program 2 times [2024-09-18 16:21:41,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:21:41,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804204853] [2024-09-18 16:21:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:41,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:21:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:21:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:21:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:21:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:21:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:21:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 16:21:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:21:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 16:21:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 16:21:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 16:21:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 16:21:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 16:21:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-18 16:21:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-18 16:21:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-18 16:21:41,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:21:41,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804204853] [2024-09-18 16:21:41,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804204853] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:21:41,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223173115] [2024-09-18 16:21:41,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:21:41,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:41,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:21:41,435 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) [2024-09-18 16:21:41,436 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 16:21:41,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:21:41,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:21:41,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 16:21:41,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:21:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-18 16:21:41,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:21:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-18 16:21:41,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223173115] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:21:41,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:21:41,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-18 16:21:41,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269921038] [2024-09-18 16:21:41,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:21:41,591 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:21:41,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:21:41,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:21:41,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:21:41,592 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-18 16:21:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:21:41,642 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2024-09-18 16:21:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-18 16:21:41,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 87 [2024-09-18 16:21:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:21:41,644 INFO L225 Difference]: With dead ends: 124 [2024-09-18 16:21:41,644 INFO L226 Difference]: Without dead ends: 102 [2024-09-18 16:21:41,644 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:21:41,644 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:21:41,645 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:21:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-18 16:21:41,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-09-18 16:21:41,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-18 16:21:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2024-09-18 16:21:41,667 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 87 [2024-09-18 16:21:41,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:21:41,668 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2024-09-18 16:21:41,668 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-18 16:21:41,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2024-09-18 16:21:41,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-18 16:21:41,669 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:21:41,669 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 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, 1, 1, 1] [2024-09-18 16:21:41,681 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 16:21:41,869 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-18 16:21:41,870 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:21:41,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:41,870 INFO L85 PathProgramCache]: Analyzing trace with hash -637517709, now seen corresponding path program 1 times [2024-09-18 16:21:41,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:21:41,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965685197] [2024-09-18 16:21:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:41,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:21:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:21:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:21:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:21:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:21:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:21:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 16:21:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:21:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 16:21:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 16:21:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 16:21:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 16:21:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 16:21:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-18 16:21:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-18 16:21:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-18 16:21:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-18 16:21:42,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:21:42,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965685197] [2024-09-18 16:21:42,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965685197] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:21:42,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492709556] [2024-09-18 16:21:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:42,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:42,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:21:42,123 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:21:42,125 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 16:21:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:42,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-18 16:21:42,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:21:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-18 16:21:42,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:21:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-18 16:21:42,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492709556] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:21:42,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:21:42,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-09-18 16:21:42,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545361207] [2024-09-18 16:21:42,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:21:42,694 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-18 16:21:42,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:21:42,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-18 16:21:42,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-18 16:21:42,695 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-18 16:21:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:21:42,936 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2024-09-18 16:21:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-18 16:21:42,937 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) Word has length 90 [2024-09-18 16:21:42,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:21:42,938 INFO L225 Difference]: With dead ends: 117 [2024-09-18 16:21:42,938 INFO L226 Difference]: Without dead ends: 100 [2024-09-18 16:21:42,939 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-09-18 16:21:42,939 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 27 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:21:42,939 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 384 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:21:42,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-18 16:21:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2024-09-18 16:21:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-18 16:21:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2024-09-18 16:21:42,959 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 90 [2024-09-18 16:21:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:21:42,959 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2024-09-18 16:21:42,959 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-18 16:21:42,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2024-09-18 16:21:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-18 16:21:42,960 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:21:42,960 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:21:42,973 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-18 16:21:43,161 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:43,161 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:21:43,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:43,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1204328542, now seen corresponding path program 1 times [2024-09-18 16:21:43,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:21:43,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913088370] [2024-09-18 16:21:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:43,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:21:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:21:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:21:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:21:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:21:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:21:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 16:21:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:21:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 16:21:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 16:21:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 16:21:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 16:21:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 16:21:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-18 16:21:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-18 16:21:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-18 16:21:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-18 16:21:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-18 16:21:43,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:21:43,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913088370] [2024-09-18 16:21:43,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913088370] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:21:43,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744652718] [2024-09-18 16:21:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:43,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:43,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:21:43,260 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) [2024-09-18 16:21:43,262 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 16:21:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:21:43,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-18 16:21:43,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:21:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2024-09-18 16:21:43,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:21:43,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744652718] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:21:43,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:21:43,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-09-18 16:21:43,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727221359] [2024-09-18 16:21:43,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:21:43,335 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:21:43,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:21:43,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:21:43,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:21:43,336 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-18 16:21:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:21:43,392 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2024-09-18 16:21:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:21:43,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 94 [2024-09-18 16:21:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:21:43,394 INFO L225 Difference]: With dead ends: 100 [2024-09-18 16:21:43,394 INFO L226 Difference]: Without dead ends: 88 [2024-09-18 16:21:43,394 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:21:43,394 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:21:43,395 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:21:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-18 16:21:43,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-18 16:21:43,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-18 16:21:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2024-09-18 16:21:43,423 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 94 [2024-09-18 16:21:43,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:21:43,424 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2024-09-18 16:21:43,424 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-18 16:21:43,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:43,425 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2024-09-18 16:21:43,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-18 16:21:43,425 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:21:43,425 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:21:43,437 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-18 16:21:43,626 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:43,626 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:21:43,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:21:43,627 INFO L85 PathProgramCache]: Analyzing trace with hash -588826413, now seen corresponding path program 3 times [2024-09-18 16:21:43,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:21:43,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140931548] [2024-09-18 16:21:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:21:43,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:21:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:21:43,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506436882] [2024-09-18 16:21:43,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 16:21:43,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:21:43,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:21:43,666 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) [2024-09-18 16:21:43,667 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 16:21:43,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 16:21:43,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:21:43,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-18 16:21:43,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:21:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 37 proven. 49 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-18 16:21:44,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:21:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 37 proven. 49 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-18 16:21:55,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:21:55,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140931548] [2024-09-18 16:21:55,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:21:55,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506436882] [2024-09-18 16:21:55,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506436882] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:21:55,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:21:55,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-09-18 16:21:55,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490015004] [2024-09-18 16:21:55,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:21:55,899 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 16:21:55,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:21:55,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 16:21:55,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-09-18 16:21:55,900 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2024-09-18 16:22:01,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:01,989 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2024-09-18 16:22:01,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-18 16:22:01,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 104 [2024-09-18 16:22:01,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:01,991 INFO L225 Difference]: With dead ends: 162 [2024-09-18 16:22:01,991 INFO L226 Difference]: Without dead ends: 140 [2024-09-18 16:22:01,991 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2024-09-18 16:22:01,992 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 52 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:01,992 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 433 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-18 16:22:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-09-18 16:22:02,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2024-09-18 16:22:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 75 states have (on average 1.12) internal successors, (84), 79 states have internal predecessors, (84), 38 states have call successors, (38), 15 states have call predecessors, (38), 14 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-18 16:22:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2024-09-18 16:22:02,026 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 104 [2024-09-18 16:22:02,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:02,026 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2024-09-18 16:22:02,027 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2024-09-18 16:22:02,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2024-09-18 16:22:02,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-18 16:22:02,028 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:02,028 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:22:02,035 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-18 16:22:02,228 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-18 16:22:02,228 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:02,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:02,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1973122394, now seen corresponding path program 2 times [2024-09-18 16:22:02,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:02,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40019386] [2024-09-18 16:22:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:02,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:22:02,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884308185] [2024-09-18 16:22:02,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:22:02,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:02,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:02,269 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) [2024-09-18 16:22:02,277 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 16:22:02,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:22:02,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:22:02,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-18 16:22:02,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:22:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 124 proven. 22 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2024-09-18 16:22:02,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:22:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-18 16:22:02,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:02,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40019386] [2024-09-18 16:22:02,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:22:02,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884308185] [2024-09-18 16:22:02,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884308185] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:22:02,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:22:02,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2024-09-18 16:22:02,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477136571] [2024-09-18 16:22:02,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:22:02,585 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-18 16:22:02,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:02,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-18 16:22:02,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-09-18 16:22:02,586 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-18 16:22:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:02,995 INFO L93 Difference]: Finished difference Result 142 states and 169 transitions. [2024-09-18 16:22:02,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 16:22:02,995 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 115 [2024-09-18 16:22:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:02,996 INFO L225 Difference]: With dead ends: 142 [2024-09-18 16:22:02,996 INFO L226 Difference]: Without dead ends: 140 [2024-09-18 16:22:02,997 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-09-18 16:22:02,997 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:02,997 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 216 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 16:22:02,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-09-18 16:22:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2024-09-18 16:22:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 88 states have internal predecessors, (93), 38 states have call successors, (38), 18 states have call predecessors, (38), 17 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-18 16:22:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2024-09-18 16:22:03,034 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 115 [2024-09-18 16:22:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:03,034 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2024-09-18 16:22:03,034 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-18 16:22:03,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2024-09-18 16:22:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-18 16:22:03,035 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:03,036 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:22:03,053 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-18 16:22:03,236 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-18 16:22:03,236 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:03,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:03,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1536141598, now seen corresponding path program 4 times [2024-09-18 16:22:03,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:03,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559166160] [2024-09-18 16:22:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:03,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:22:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:22:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:22:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:22:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:22:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 16:22:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:22:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 16:22:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 16:22:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 16:22:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 16:22:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 16:22:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-18 16:22:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-18 16:22:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-18 16:22:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-18 16:22:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-18 16:22:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-18 16:22:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-18 16:22:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-18 16:22:03,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:03,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559166160] [2024-09-18 16:22:03,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559166160] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:22:03,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102485137] [2024-09-18 16:22:03,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 16:22:03,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:03,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:03,466 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:22:03,467 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 16:22:03,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 16:22:03,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:22:03,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 16:22:03,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:22:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-18 16:22:03,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:22:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-18 16:22:03,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102485137] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:22:03,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:22:03,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-09-18 16:22:03,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531319550] [2024-09-18 16:22:03,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:22:03,668 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 16:22:03,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:03,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 16:22:03,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-18 16:22:03,669 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-18 16:22:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:03,774 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2024-09-18 16:22:03,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:22:03,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 117 [2024-09-18 16:22:03,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:03,776 INFO L225 Difference]: With dead ends: 167 [2024-09-18 16:22:03,776 INFO L226 Difference]: Without dead ends: 144 [2024-09-18 16:22:03,776 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-18 16:22:03,777 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 1 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:03,779 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 273 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:22:03,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-18 16:22:03,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2024-09-18 16:22:03,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 90 states have internal predecessors, (94), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-18 16:22:03,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 170 transitions. [2024-09-18 16:22:03,820 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 170 transitions. Word has length 117 [2024-09-18 16:22:03,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:03,821 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 170 transitions. [2024-09-18 16:22:03,821 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-18 16:22:03,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:03,821 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 170 transitions. [2024-09-18 16:22:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-18 16:22:03,822 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:03,822 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:22:03,835 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-18 16:22:04,022 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-18 16:22:04,023 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:04,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:04,023 INFO L85 PathProgramCache]: Analyzing trace with hash 47128766, now seen corresponding path program 2 times [2024-09-18 16:22:04,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:04,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018230407] [2024-09-18 16:22:04,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:04,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:22:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:22:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:22:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:22:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:22:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 16:22:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:22:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 16:22:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 16:22:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 16:22:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 16:22:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 16:22:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-18 16:22:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-18 16:22:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-18 16:22:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-18 16:22:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-18 16:22:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-18 16:22:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-18 16:22:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-18 16:22:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-09-18 16:22:04,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:04,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018230407] [2024-09-18 16:22:04,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018230407] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:22:04,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548630784] [2024-09-18 16:22:04,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:22:04,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:04,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:04,322 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:22:04,323 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-18 16:22:04,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:22:04,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:22:04,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-18 16:22:04,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:22:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-18 16:22:04,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:22:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-18 16:22:05,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548630784] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:22:05,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:22:05,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 30 [2024-09-18 16:22:05,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416528931] [2024-09-18 16:22:05,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:22:05,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-18 16:22:05,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:05,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-18 16:22:05,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-09-18 16:22:05,548 INFO L87 Difference]: Start difference. First operand 142 states and 170 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-18 16:22:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:06,065 INFO L93 Difference]: Finished difference Result 158 states and 191 transitions. [2024-09-18 16:22:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-18 16:22:06,066 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) Word has length 120 [2024-09-18 16:22:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:06,067 INFO L225 Difference]: With dead ends: 158 [2024-09-18 16:22:06,067 INFO L226 Difference]: Without dead ends: 130 [2024-09-18 16:22:06,067 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2024-09-18 16:22:06,067 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 23 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:06,068 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 530 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 16:22:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-18 16:22:06,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2024-09-18 16:22:06,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 80 states have internal predecessors, (83), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-18 16:22:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2024-09-18 16:22:06,097 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 120 [2024-09-18 16:22:06,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:06,098 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2024-09-18 16:22:06,098 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-18 16:22:06,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:06,098 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2024-09-18 16:22:06,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-18 16:22:06,099 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:06,099 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:22:06,110 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-18 16:22:06,299 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-18 16:22:06,299 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:06,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:06,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1414642200, now seen corresponding path program 5 times [2024-09-18 16:22:06,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:06,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853920093] [2024-09-18 16:22:06,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:06,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:22:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:22:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:22:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:22:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:22:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 16:22:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:22:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 16:22:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 16:22:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 16:22:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 16:22:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 16:22:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-18 16:22:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-18 16:22:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-18 16:22:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-18 16:22:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-18 16:22:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-18 16:22:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-18 16:22:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-18 16:22:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-18 16:22:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2024-09-18 16:22:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 42 proven. 51 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2024-09-18 16:22:06,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:06,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853920093] [2024-09-18 16:22:06,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853920093] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:22:06,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915791074] [2024-09-18 16:22:06,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 16:22:06,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:06,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:06,949 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:22:06,949 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-18 16:22:07,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-18 16:22:07,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:22:07,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-18 16:22:07,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:22:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 189 proven. 26 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-09-18 16:22:07,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:22:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 47 proven. 46 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2024-09-18 16:22:08,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915791074] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:22:08,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:22:08,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 35 [2024-09-18 16:22:08,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878294495] [2024-09-18 16:22:08,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:22:08,324 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-18 16:22:08,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-18 16:22:08,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2024-09-18 16:22:08,325 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 35 states have internal predecessors, (74), 24 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (61), 24 states have call predecessors, (61), 24 states have call successors, (61) [2024-09-18 16:22:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:09,372 INFO L93 Difference]: Finished difference Result 174 states and 210 transitions. [2024-09-18 16:22:09,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-18 16:22:09,373 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 35 states have internal predecessors, (74), 24 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (61), 24 states have call predecessors, (61), 24 states have call successors, (61) Word has length 134 [2024-09-18 16:22:09,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:09,374 INFO L225 Difference]: With dead ends: 174 [2024-09-18 16:22:09,374 INFO L226 Difference]: Without dead ends: 144 [2024-09-18 16:22:09,375 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=443, Invalid=1813, Unknown=0, NotChecked=0, Total=2256 [2024-09-18 16:22:09,375 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 88 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:09,375 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 480 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 16:22:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-18 16:22:09,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 123. [2024-09-18 16:22:09,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 75 states have (on average 1.08) internal successors, (81), 78 states have internal predecessors, (81), 30 states have call successors, (30), 18 states have call predecessors, (30), 17 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-18 16:22:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2024-09-18 16:22:09,412 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 134 [2024-09-18 16:22:09,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:09,412 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2024-09-18 16:22:09,412 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 35 states have internal predecessors, (74), 24 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (61), 24 states have call predecessors, (61), 24 states have call successors, (61) [2024-09-18 16:22:09,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:09,413 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2024-09-18 16:22:09,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-18 16:22:09,414 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:09,414 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:22:09,426 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-18 16:22:09,614 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-18 16:22:09,614 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:09,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:09,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1191381354, now seen corresponding path program 1 times [2024-09-18 16:22:09,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:09,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807264469] [2024-09-18 16:22:09,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:09,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:22:09,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819685866] [2024-09-18 16:22:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:09,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:09,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:09,652 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:22:09,653 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-18 16:22:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:09,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-18 16:22:09,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:22:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 35 proven. 109 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2024-09-18 16:22:10,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:22:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 35 proven. 103 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2024-09-18 16:22:43,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:43,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807264469] [2024-09-18 16:22:43,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:22:43,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819685866] [2024-09-18 16:22:43,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819685866] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:22:43,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:22:43,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2024-09-18 16:22:43,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440060031] [2024-09-18 16:22:43,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:22:43,479 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-18 16:22:43,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:43,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-18 16:22:43,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2024-09-18 16:22:43,480 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 29 states have internal predecessors, (61), 18 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (43), 15 states have call predecessors, (43), 16 states have call successors, (43) [2024-09-18 16:23:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:23:02,586 INFO L93 Difference]: Finished difference Result 239 states and 298 transitions. [2024-09-18 16:23:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-18 16:23:02,587 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 29 states have internal predecessors, (61), 18 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (43), 15 states have call predecessors, (43), 16 states have call successors, (43) Word has length 134 [2024-09-18 16:23:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:23:02,588 INFO L225 Difference]: With dead ends: 239 [2024-09-18 16:23:02,588 INFO L226 Difference]: Without dead ends: 207 [2024-09-18 16:23:02,589 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=512, Invalid=1840, Unknown=0, NotChecked=0, Total=2352 [2024-09-18 16:23:02,589 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 101 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:23:02,589 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 680 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-09-18 16:23:02,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-09-18 16:23:02,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 197. [2024-09-18 16:23:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 122 states have (on average 1.1475409836065573) internal successors, (140), 126 states have internal predecessors, (140), 51 states have call successors, (51), 24 states have call predecessors, (51), 23 states have return successors, (49), 46 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-18 16:23:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 240 transitions. [2024-09-18 16:23:02,700 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 240 transitions. Word has length 134 [2024-09-18 16:23:02,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:23:02,701 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 240 transitions. [2024-09-18 16:23:02,701 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 29 states have internal predecessors, (61), 18 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (43), 15 states have call predecessors, (43), 16 states have call successors, (43) [2024-09-18 16:23:02,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:23:02,701 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 240 transitions. [2024-09-18 16:23:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-09-18 16:23:02,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:23:02,702 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:23:02,714 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-18 16:23:02,902 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-18 16:23:02,902 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:23:02,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:23:02,903 INFO L85 PathProgramCache]: Analyzing trace with hash -909439750, now seen corresponding path program 2 times [2024-09-18 16:23:02,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:23:02,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291228614] [2024-09-18 16:23:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:23:02,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:23:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:23:02,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973511273] [2024-09-18 16:23:02,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:23:02,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:23:02,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:23:02,934 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:23:02,935 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-18 16:23:03,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:23:03,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:23:03,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-18 16:23:03,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:23:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 67 proven. 85 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2024-09-18 16:23:03,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:23:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 98 proven. 117 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2024-09-18 16:23:20,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:23:20,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291228614] [2024-09-18 16:23:20,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:23:20,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973511273] [2024-09-18 16:23:20,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973511273] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:23:20,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:23:20,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2024-09-18 16:23:20,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661741843] [2024-09-18 16:23:20,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:23:20,203 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-18 16:23:20,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:23:20,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-18 16:23:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=908, Unknown=1, NotChecked=0, Total=1122 [2024-09-18 16:23:20,204 INFO L87 Difference]: Start difference. First operand 197 states and 240 transitions. Second operand has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 31 states have internal predecessors, (64), 20 states have call successors, (47), 4 states have call predecessors, (47), 4 states have return successors, (45), 19 states have call predecessors, (45), 20 states have call successors, (45) [2024-09-18 16:23:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:23:20,331 INFO L93 Difference]: Finished difference Result 197 states and 240 transitions. [2024-09-18 16:23:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 16:23:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 31 states have internal predecessors, (64), 20 states have call successors, (47), 4 states have call predecessors, (47), 4 states have return successors, (45), 19 states have call predecessors, (45), 20 states have call successors, (45) Word has length 139 [2024-09-18 16:23:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:23:20,332 INFO L225 Difference]: With dead ends: 197 [2024-09-18 16:23:20,332 INFO L226 Difference]: Without dead ends: 0 [2024-09-18 16:23:20,332 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=213, Invalid=908, Unknown=1, NotChecked=0, Total=1122 [2024-09-18 16:23:20,333 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:23:20,333 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 104 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:23:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-18 16:23:20,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-18 16:23:20,333 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) [2024-09-18 16:23:20,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-18 16:23:20,334 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2024-09-18 16:23:20,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:23:20,334 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-18 16:23:20,334 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 31 states have internal predecessors, (64), 20 states have call successors, (47), 4 states have call predecessors, (47), 4 states have return successors, (45), 19 states have call predecessors, (45), 20 states have call successors, (45) [2024-09-18 16:23:20,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:23:20,334 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-18 16:23:20,334 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-18 16:23:20,337 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-18 16:23:20,350 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-18 16:23:20,541 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:23:20,544 INFO L408 BasicCegarLoop]: Path program histogram: [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:23:20,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-18 16:23:22,145 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-18 16:23:22,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 04:23:22 BoogieIcfgContainer [2024-09-18 16:23:22,161 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-18 16:23:22,161 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-18 16:23:22,161 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-18 16:23:22,161 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-18 16:23:22,162 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:21:34" (3/4) ... [2024-09-18 16:23:22,163 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-18 16:23:22,207 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-18 16:23:22,208 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-18 16:23:22,208 INFO L158 Benchmark]: Toolchain (without parser) took 108726.87ms. Allocated memory was 169.9MB in the beginning and 297.8MB in the end (delta: 127.9MB). Free memory was 138.3MB in the beginning and 177.5MB in the end (delta: -39.2MB). Peak memory consumption was 89.8MB. Max. memory is 16.1GB. [2024-09-18 16:23:22,208 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 121.6MB. Free memory is still 83.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 16:23:22,208 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.99ms. Allocated memory is still 169.9MB. Free memory was 137.3MB in the beginning and 125.8MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-18 16:23:22,209 INFO L158 Benchmark]: Boogie Procedure Inliner took 15.33ms. Allocated memory is still 169.9MB. Free memory was 125.8MB in the beginning and 124.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 16:23:22,209 INFO L158 Benchmark]: Boogie Preprocessor took 25.83ms. Allocated memory is still 169.9MB. Free memory was 124.8MB in the beginning and 123.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 16:23:22,209 INFO L158 Benchmark]: RCFGBuilder took 259.32ms. Allocated memory is still 169.9MB. Free memory was 123.7MB in the beginning and 109.1MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-18 16:23:22,209 INFO L158 Benchmark]: TraceAbstraction took 108159.42ms. Allocated memory was 169.9MB in the beginning and 297.8MB in the end (delta: 127.9MB). Free memory was 108.0MB in the beginning and 179.6MB in the end (delta: -71.7MB). Peak memory consumption was 152.7MB. Max. memory is 16.1GB. [2024-09-18 16:23:22,209 INFO L158 Benchmark]: Witness Printer took 46.36ms. Allocated memory is still 297.8MB. Free memory was 179.6MB in the beginning and 177.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 16:23:22,210 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 121.6MB. Free memory is still 83.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 215.99ms. Allocated memory is still 169.9MB. Free memory was 137.3MB in the beginning and 125.8MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 15.33ms. Allocated memory is still 169.9MB. Free memory was 125.8MB in the beginning and 124.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.83ms. Allocated memory is still 169.9MB. Free memory was 124.8MB in the beginning and 123.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 259.32ms. Allocated memory is still 169.9MB. Free memory was 123.7MB in the beginning and 109.1MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 108159.42ms. Allocated memory was 169.9MB in the beginning and 297.8MB in the end (delta: 127.9MB). Free memory was 108.0MB in the beginning and 179.6MB in the end (delta: -71.7MB). Peak memory consumption was 152.7MB. Max. memory is 16.1GB. * Witness Printer took 46.36ms. Allocated memory is still 297.8MB. Free memory was 179.6MB in the beginning and 177.5MB 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, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 106.5s, OverallIterations: 19, TraceHistogramMax: 20, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 29.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 525 SdHoareTripleChecker+Valid, 10.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 474 mSDsluCounter, 4867 SdHoareTripleChecker+Invalid, 9.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4101 mSDsCounter, 691 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3762 IncrementalHoareTripleChecker+Invalid, 4453 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 691 mSolverCounterUnsat, 766 mSDtfsCounter, 3762 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3119 GetRequests, 2792 SyntacticMatches, 6 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 34.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=197occurred in iteration=18, InterpolantAutomatonStates: 201, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 19 MinimizatonAttempts, 113 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 71.9s InterpolantComputationTime, 3002 NumberOfCodeBlocks, 2975 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 3475 ConstructedInterpolants, 1 QuantifiedInterpolants, 43974 SizeOfPredicates, 33 NumberOfNonLiveVariables, 3078 ConjunctsInSsa, 373 ConjunctsInUnsatCore, 38 InterpolantComputations, 7 PerfectInterpolantSequences, 12185/13176 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: 46]: Loop Invariant Derived loop invariant: ((((((((((((0 <= r) && (((__int128) r + 1) <= d)) && (((__int128) d + r) == A)) && (((__int128) r + (2 * B)) == ((__int128) A + d))) && (q == 1)) && (p == 1)) || (((((((0 <= (r + (((__int128) -1 * d) / 2))) && (((__int128) r + 1) <= d)) && (((__int128) A + d) == ((__int128) (B * 4) + r))) && ((d % 2) == 0)) && (q == 0)) && (p == 4)) && ((A + (d / 2)) == ((__int128) r + (2 * B))))) || ((((((q == 2) && (0 <= r)) && (p == 2)) && (((__int128) A + d) == ((__int128) (B * 4) + r))) && (A == ((__int128) r + (2 * B)))) && ((((__int128) d + r) + 1) <= (B * 4)))) || ((((((A == r) && (d == (2 * B))) && (((__int128) r + 1) <= d)) && (p == 2)) && (q == 0)) && (B <= r))) || ((((((q == 2) && (B <= 2147483647)) && (((__int128) r + 1) <= ((__int128) d + (d / 2)))) && (d == ((A + ((__int128) -1 * r)) / 2))) && (A == ((__int128) r + (2 * B)))) && (p == 1))) || (((((((((__int128) r + B) + ((__int128) q * B)) == ((__int128) A + d)) && (((__int128) r + 1) <= ((__int128) d + (d / 2)))) && (((__int128) r + (2 * B)) <= 4294967295)) && ((r + ((__int128) q * B)) == A)) && (((__int128) d + (2 * B)) <= 4294967295)) && (p == 1))) || ((((d == B) && (A == r)) && (q == 0)) && (p == 1))) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((d == B) && (A == r)) && (A <= 5)) && (q == 0)) && (1 <= d)) && (p == 1)) - 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! [2024-09-18 16:23:22,372 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE