./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.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 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.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 39b9505d3a064a677b57bccb6de3a4c04e873275d34ee3c16e80371638b07149 --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-6908dde-m [2024-09-24 23:51:17,309 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:51:17,391 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:51:17,405 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:51:17,405 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:51:17,430 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:51:17,431 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:51:17,431 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:51:17,432 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:51:17,432 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:51:17,433 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:51:17,433 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:51:17,434 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:51:17,434 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:51:17,434 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:51:17,435 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:51:17,435 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:51:17,436 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:51:17,436 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:51:17,436 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:51:17,436 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:51:17,440 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:51:17,440 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:51:17,441 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:51:17,441 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:51:17,441 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:51:17,441 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:51:17,442 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:51:17,442 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:51:17,442 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:51:17,442 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:51:17,443 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:51:17,443 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:51:17,443 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:51:17,443 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:51:17,443 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:51:17,444 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:51:17,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:51:17,444 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:51:17,444 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:51:17,445 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:51:17,445 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:51:17,445 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b9505d3a064a677b57bccb6de3a4c04e873275d34ee3c16e80371638b07149 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:51:17,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:51:17,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:51:17,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:51:17,715 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:51:17,716 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:51:17,717 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2024-09-24 23:51:19,103 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:51:19,269 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:51:19,269 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2024-09-24 23:51:19,279 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a025df01b/52a305219ffb42a5add4427630af3439/FLAG7a4e8e3d0 [2024-09-24 23:51:19,292 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a025df01b/52a305219ffb42a5add4427630af3439 [2024-09-24 23:51:19,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:51:19,296 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:51:19,298 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:51:19,298 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:51:19,302 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:51:19,303 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:51:19" (1/1) ... [2024-09-24 23:51:19,304 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@348c7e81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19, skipping insertion in model container [2024-09-24 23:51:19,304 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:51:19" (1/1) ... [2024-09-24 23:51:19,321 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:51:19,477 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/hard2_valuebound2.c[526,539] [2024-09-24 23:51:19,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:51:19,503 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:51:19,515 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/hard2_valuebound2.c[526,539] [2024-09-24 23:51:19,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:51:19,536 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:51:19,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19 WrapperNode [2024-09-24 23:51:19,537 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:51:19,538 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:51:19,538 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:51:19,539 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:51:19,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19" (1/1) ... [2024-09-24 23:51:19,550 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19" (1/1) ... [2024-09-24 23:51:19,555 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:51:19,555 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:51:19,555 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:51:19,555 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:51:19,556 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:51:19,564 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19" (1/1) ... [2024-09-24 23:51:19,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19" (1/1) ... [2024-09-24 23:51:19,565 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19" (1/1) ... [2024-09-24 23:51:19,576 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-09-24 23:51:19,576 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19" (1/1) ... [2024-09-24 23:51:19,576 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19" (1/1) ... [2024-09-24 23:51:19,579 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19" (1/1) ... [2024-09-24 23:51:19,582 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19" (1/1) ... [2024-09-24 23:51:19,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19" (1/1) ... [2024-09-24 23:51:19,587 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19" (1/1) ... [2024-09-24 23:51:19,589 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:51:19,590 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:51:19,590 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:51:19,590 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:51:19,591 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19" (1/1) ... [2024-09-24 23:51:19,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:51:19,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:51:19,631 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) [2024-09-24 23:51:19,634 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 [2024-09-24 23:51:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:51:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-24 23:51:19,686 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-24 23:51:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:51:19,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:51:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:51:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-24 23:51:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:51:19,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:51:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:51:19,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:51:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:51:19,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:51:19,757 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:51:19,759 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:51:19,922 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-24 23:51:19,922 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:51:19,950 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:51:19,950 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-24 23:51:19,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:51:19 BoogieIcfgContainer [2024-09-24 23:51:19,951 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:51:19,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:51:19,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:51:19,956 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:51:19,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:51:19" (1/3) ... [2024-09-24 23:51:19,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad84f9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:51:19, skipping insertion in model container [2024-09-24 23:51:19,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:19" (2/3) ... [2024-09-24 23:51:19,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad84f9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:51:19, skipping insertion in model container [2024-09-24 23:51:19,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:51:19" (3/3) ... [2024-09-24 23:51:19,958 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound2.c [2024-09-24 23:51:19,973 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:51:19,973 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:51:20,022 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:51:20,028 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;@63daa283, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:51:20,028 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:51:20,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-24 23:51:20,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-24 23:51:20,037 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:20,038 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:51:20,038 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:20,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:20,043 INFO L85 PathProgramCache]: Analyzing trace with hash -909137831, now seen corresponding path program 1 times [2024-09-24 23:51:20,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:20,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866910339] [2024-09-24 23:51:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:20,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:20,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:51:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:20,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:51:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:51:20,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:20,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866910339] [2024-09-24 23:51:20,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866910339] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:51:20,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:51:20,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-24 23:51:20,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598219964] [2024-09-24 23:51:20,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:51:20,226 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-24 23:51:20,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:20,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-24 23:51:20,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:51:20,247 INFO L87 Difference]: Start difference. First operand has 33 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:51:20,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:20,274 INFO L93 Difference]: Finished difference Result 58 states and 92 transitions. [2024-09-24 23:51:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-24 23:51:20,276 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-24 23:51:20,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:20,283 INFO L225 Difference]: With dead ends: 58 [2024-09-24 23:51:20,283 INFO L226 Difference]: Without dead ends: 29 [2024-09-24 23:51:20,286 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:51:20,289 INFO L434 NwaCegarLoop]: 39 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, 39 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 [2024-09-24 23:51:20,291 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:51:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-24 23:51:20,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-24 23:51:20,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-24 23:51:20,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-09-24 23:51:20,329 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 16 [2024-09-24 23:51:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:20,330 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-09-24 23:51:20,330 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:51:20,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-09-24 23:51:20,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-24 23:51:20,333 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:20,333 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:51:20,333 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:51:20,335 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:20,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash -229079461, now seen corresponding path program 1 times [2024-09-24 23:51:20,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:20,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595443851] [2024-09-24 23:51:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:20,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:20,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:51:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:20,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:51:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:51:20,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:20,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595443851] [2024-09-24 23:51:20,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595443851] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:51:20,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:51:20,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:51:20,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114281330] [2024-09-24 23:51:20,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:51:20,535 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:51:20,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:20,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:51:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:51:20,537 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:51:20,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:20,619 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2024-09-24 23:51:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:51:20,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-24 23:51:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:20,621 INFO L225 Difference]: With dead ends: 42 [2024-09-24 23:51:20,621 INFO L226 Difference]: Without dead ends: 40 [2024-09-24 23:51:20,634 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:51:20,635 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 114 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 [2024-09-24 23:51:20,636 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 114 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:51:20,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-24 23:51:20,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2024-09-24 23:51:20,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-24 23:51:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-09-24 23:51:20,649 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 16 [2024-09-24 23:51:20,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:20,650 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-09-24 23:51:20,650 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:51:20,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:20,651 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-09-24 23:51:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-24 23:51:20,652 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:20,652 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:51:20,652 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 23:51:20,652 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:20,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:20,653 INFO L85 PathProgramCache]: Analyzing trace with hash 520476838, now seen corresponding path program 1 times [2024-09-24 23:51:20,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:20,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976572670] [2024-09-24 23:51:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:20,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:20,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:51:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:20,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:51:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:20,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-24 23:51:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:51:20,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:20,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976572670] [2024-09-24 23:51:20,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976572670] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:51:20,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:51:20,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:51:20,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160072260] [2024-09-24 23:51:20,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:51:20,800 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:51:20,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:20,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:51:20,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:51:20,801 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:51:20,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:20,884 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-09-24 23:51:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:51:20,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-24 23:51:20,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:20,887 INFO L225 Difference]: With dead ends: 46 [2024-09-24 23:51:20,888 INFO L226 Difference]: Without dead ends: 44 [2024-09-24 23:51:20,889 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:51:20,890 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:51:20,891 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 111 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:51:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-24 23:51:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-09-24 23:51:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-24 23:51:20,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-09-24 23:51:20,912 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 21 [2024-09-24 23:51:20,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:20,912 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-09-24 23:51:20,913 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:51:20,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:20,913 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-09-24 23:51:20,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-24 23:51:20,914 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:20,914 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:51:20,914 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-24 23:51:20,915 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:20,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:20,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1140086011, now seen corresponding path program 1 times [2024-09-24 23:51:20,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:20,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947808812] [2024-09-24 23:51:20,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:20,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:51:20,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648661619] [2024-09-24 23:51:20,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:20,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:51:20,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:51:20,956 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) [2024-09-24 23:51:20,957 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:51:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:21,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-24 23:51:21,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:51:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:51:21,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:51:21,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:21,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947808812] [2024-09-24 23:51:21,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:51:21,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648661619] [2024-09-24 23:51:21,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648661619] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:51:21,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:51:21,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:51:21,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266033335] [2024-09-24 23:51:21,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:51:21,121 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:51:21,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:21,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:51:21,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:51:21,122 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-24 23:51:21,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:21,199 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-09-24 23:51:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:51:21,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-09-24 23:51:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:21,202 INFO L225 Difference]: With dead ends: 63 [2024-09-24 23:51:21,203 INFO L226 Difference]: Without dead ends: 50 [2024-09-24 23:51:21,203 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 [2024-09-24 23:51:21,204 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:51:21,206 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 113 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:51:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-24 23:51:21,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-24 23:51:21,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-24 23:51:21,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2024-09-24 23:51:21,224 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 26 [2024-09-24 23:51:21,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:21,224 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2024-09-24 23:51:21,225 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-24 23:51:21,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2024-09-24 23:51:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-24 23:51:21,226 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:21,226 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:51:21,238 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 23:51:21,427 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 [2024-09-24 23:51:21,427 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:21,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:21,428 INFO L85 PathProgramCache]: Analyzing trace with hash -975701997, now seen corresponding path program 1 times [2024-09-24 23:51:21,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:21,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496164439] [2024-09-24 23:51:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:21,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:51:21,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851192363] [2024-09-24 23:51:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:21,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:51:21,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:51:21,462 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) [2024-09-24 23:51:21,473 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:51:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:21,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:51:21,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:51:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 23:51:21,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:51:21,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:21,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496164439] [2024-09-24 23:51:21,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:51:21,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851192363] [2024-09-24 23:51:21,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851192363] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:51:21,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:51:21,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:51:21,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801873549] [2024-09-24 23:51:21,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:51:21,616 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:51:21,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:21,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:51:21,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:51:21,617 INFO L87 Difference]: Start difference. First operand 50 states and 61 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, (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) [2024-09-24 23:51:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:21,692 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2024-09-24 23:51:21,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:51:21,694 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, (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 33 [2024-09-24 23:51:21,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:21,696 INFO L225 Difference]: With dead ends: 63 [2024-09-24 23:51:21,696 INFO L226 Difference]: Without dead ends: 61 [2024-09-24 23:51:21,696 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:51:21,697 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:51:21,697 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 95 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:51:21,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-24 23:51:21,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-09-24 23:51:21,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-24 23:51:21,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2024-09-24 23:51:21,712 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 33 [2024-09-24 23:51:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:21,712 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2024-09-24 23:51:21,712 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, (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) [2024-09-24 23:51:21,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2024-09-24 23:51:21,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-24 23:51:21,714 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:21,714 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:51:21,731 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-24 23:51:21,914 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 [2024-09-24 23:51:21,915 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:21,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:21,915 INFO L85 PathProgramCache]: Analyzing trace with hash -928833564, now seen corresponding path program 1 times [2024-09-24 23:51:21,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:21,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752065152] [2024-09-24 23:51:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:21,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:51:21,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696581377] [2024-09-24 23:51:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:21,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:51:21,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:51:21,932 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) [2024-09-24 23:51:21,935 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:51:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:21,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-24 23:51:21,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:51:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-24 23:51:22,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:51:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-24 23:51:22,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:22,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752065152] [2024-09-24 23:51:22,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:51:22,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696581377] [2024-09-24 23:51:22,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696581377] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-24 23:51:22,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:51:22,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-24 23:51:22,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119524825] [2024-09-24 23:51:22,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:51:22,184 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:51:22,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:22,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:51:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:51:22,185 INFO L87 Difference]: Start difference. First operand 60 states and 75 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) [2024-09-24 23:51:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:22,255 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2024-09-24 23:51:22,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:51:22,256 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 43 [2024-09-24 23:51:22,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:22,258 INFO L225 Difference]: With dead ends: 70 [2024-09-24 23:51:22,258 INFO L226 Difference]: Without dead ends: 68 [2024-09-24 23:51:22,259 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:51:22,261 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:51:22,262 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 106 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:51:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-24 23:51:22,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-09-24 23:51:22,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 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) [2024-09-24 23:51:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2024-09-24 23:51:22,287 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 43 [2024-09-24 23:51:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:22,287 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2024-09-24 23:51:22,288 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) [2024-09-24 23:51:22,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2024-09-24 23:51:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-24 23:51:22,289 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:22,290 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2024-09-24 23:51:22,305 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-24 23:51:22,490 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 [2024-09-24 23:51:22,490 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:22,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:22,491 INFO L85 PathProgramCache]: Analyzing trace with hash -238148106, now seen corresponding path program 1 times [2024-09-24 23:51:22,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:22,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950182212] [2024-09-24 23:51:22,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:22,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:22,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:51:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:22,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:51:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:22,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-24 23:51:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:22,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-24 23:51:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:22,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-24 23:51:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:22,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-24 23:51:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:22,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-24 23:51:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:22,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-24 23:51:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-24 23:51:22,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:22,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950182212] [2024-09-24 23:51:22,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950182212] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:51:22,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:51:22,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:51:22,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798260578] [2024-09-24 23:51:22,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:51:22,695 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:51:22,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:22,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:51:22,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:51:22,697 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-24 23:51:22,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:22,755 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2024-09-24 23:51:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:51:22,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-24 23:51:22,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:22,757 INFO L225 Difference]: With dead ends: 75 [2024-09-24 23:51:22,759 INFO L226 Difference]: Without dead ends: 63 [2024-09-24 23:51:22,759 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:51:22,760 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:51:22,761 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:51:22,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-24 23:51:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-24 23:51:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 39 states have internal predecessors, (42), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-24 23:51:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2024-09-24 23:51:22,775 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 49 [2024-09-24 23:51:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:22,777 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2024-09-24 23:51:22,778 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-24 23:51:22,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:22,778 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2024-09-24 23:51:22,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-24 23:51:22,779 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:22,779 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:51:22,779 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-24 23:51:22,779 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:22,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:22,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1374799408, now seen corresponding path program 1 times [2024-09-24 23:51:22,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:22,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062140962] [2024-09-24 23:51:22,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:22,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:51:22,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362266303] [2024-09-24 23:51:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:22,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:51:22,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:51:22,825 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) [2024-09-24 23:51:22,827 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:51:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:22,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-24 23:51:22,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:51:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-24 23:51:23,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:51:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-24 23:51:24,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:24,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062140962] [2024-09-24 23:51:24,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:51:24,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362266303] [2024-09-24 23:51:24,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362266303] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:51:24,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:51:24,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-09-24 23:51:24,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498262370] [2024-09-24 23:51:24,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:51:24,640 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-24 23:51:24,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:24,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-24 23:51:24,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:51:24,641 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-24 23:51:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:25,282 INFO L93 Difference]: Finished difference Result 138 states and 183 transitions. [2024-09-24 23:51:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-24 23:51:25,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 63 [2024-09-24 23:51:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:25,284 INFO L225 Difference]: With dead ends: 138 [2024-09-24 23:51:25,286 INFO L226 Difference]: Without dead ends: 115 [2024-09-24 23:51:25,287 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-09-24 23:51:25,288 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:51:25,288 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 225 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:51:25,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-24 23:51:25,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-09-24 23:51:25,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 71 states have internal predecessors, (80), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-24 23:51:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2024-09-24 23:51:25,335 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 63 [2024-09-24 23:51:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:25,336 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2024-09-24 23:51:25,336 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-24 23:51:25,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:25,337 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2024-09-24 23:51:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-24 23:51:25,340 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:25,340 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 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] [2024-09-24 23:51:25,356 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-24 23:51:25,544 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 [2024-09-24 23:51:25,545 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:25,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:25,545 INFO L85 PathProgramCache]: Analyzing trace with hash -2048390162, now seen corresponding path program 1 times [2024-09-24 23:51:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:25,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245084364] [2024-09-24 23:51:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:25,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:51:25,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982644036] [2024-09-24 23:51:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:25,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:51:25,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:51:25,582 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) [2024-09-24 23:51:25,583 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 23:51:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:25,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-24 23:51:25,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:51:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-24 23:51:25,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:51:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-24 23:51:26,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:26,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245084364] [2024-09-24 23:51:26,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:51:26,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982644036] [2024-09-24 23:51:26,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982644036] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:51:26,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:51:26,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-09-24 23:51:26,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908311301] [2024-09-24 23:51:26,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:51:26,368 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-24 23:51:26,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:26,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-24 23:51:26,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-09-24 23:51:26,369 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-24 23:51:27,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:27,053 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2024-09-24 23:51:27,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-24 23:51:27,053 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 74 [2024-09-24 23:51:27,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:27,057 INFO L225 Difference]: With dead ends: 168 [2024-09-24 23:51:27,057 INFO L226 Difference]: Without dead ends: 136 [2024-09-24 23:51:27,057 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-09-24 23:51:27,058 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-24 23:51:27,058 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 195 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-24 23:51:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-09-24 23:51:27,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2024-09-24 23:51:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 70 states have internal predecessors, (76), 31 states have call successors, (31), 14 states have call predecessors, (31), 13 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-24 23:51:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 136 transitions. [2024-09-24 23:51:27,093 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 136 transitions. Word has length 74 [2024-09-24 23:51:27,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:27,093 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 136 transitions. [2024-09-24 23:51:27,093 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-24 23:51:27,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:27,094 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 136 transitions. [2024-09-24 23:51:27,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-24 23:51:27,095 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:27,095 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 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] [2024-09-24 23:51:27,111 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-24 23:51:27,296 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 [2024-09-24 23:51:27,296 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:27,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:27,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1556827571, now seen corresponding path program 1 times [2024-09-24 23:51:27,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:27,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406836995] [2024-09-24 23:51:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:27,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:51:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:51:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-24 23:51:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-24 23:51:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-24 23:51:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-24 23:51:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-24 23:51:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-24 23:51:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-24 23:51:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-24 23:51:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-24 23:51:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-24 23:51:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-24 23:51:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-24 23:51:27,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:27,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406836995] [2024-09-24 23:51:27,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406836995] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:51:27,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116610289] [2024-09-24 23:51:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:27,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:51:27,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:51:27,623 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) [2024-09-24 23:51:27,624 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 23:51:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:27,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-24 23:51:27,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:51:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-24 23:51:27,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:51:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-24 23:51:28,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116610289] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:51:28,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:51:28,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-24 23:51:28,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213679559] [2024-09-24 23:51:28,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:51:28,190 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-24 23:51:28,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:28,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-24 23:51:28,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-09-24 23:51:28,191 INFO L87 Difference]: Start difference. First operand 110 states and 136 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 8 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2024-09-24 23:51:28,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:28,373 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2024-09-24 23:51:28,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-24 23:51:28,373 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 8 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) Word has length 79 [2024-09-24 23:51:28,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:28,374 INFO L225 Difference]: With dead ends: 129 [2024-09-24 23:51:28,375 INFO L226 Difference]: Without dead ends: 100 [2024-09-24 23:51:28,375 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:51:28,376 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:51:28,376 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 225 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:51:28,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-24 23:51:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-09-24 23:51:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 63 states have internal predecessors, (67), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-24 23:51:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2024-09-24 23:51:28,403 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 79 [2024-09-24 23:51:28,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:28,403 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2024-09-24 23:51:28,403 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 8 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2024-09-24 23:51:28,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:28,404 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2024-09-24 23:51:28,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-24 23:51:28,405 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:28,405 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 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] [2024-09-24 23:51:28,421 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-24 23:51:28,609 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 [2024-09-24 23:51:28,610 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:28,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:28,611 INFO L85 PathProgramCache]: Analyzing trace with hash -802122381, now seen corresponding path program 2 times [2024-09-24 23:51:28,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:28,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237464996] [2024-09-24 23:51:28,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:28,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:28,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:51:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:28,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:51:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:29,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-24 23:51:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:29,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-24 23:51:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:29,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-24 23:51:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:29,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-24 23:51:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:29,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-24 23:51:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:29,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-24 23:51:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:29,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-24 23:51:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:29,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-24 23:51:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:29,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-24 23:51:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:29,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-24 23:51:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:29,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-24 23:51:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:29,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-24 23:51:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:29,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-24 23:51:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-24 23:51:29,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:29,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237464996] [2024-09-24 23:51:29,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237464996] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:51:29,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636795161] [2024-09-24 23:51:29,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:51:29,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:51:29,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:51:29,050 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) [2024-09-24 23:51:29,054 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-24 23:51:29,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:51:29,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:51:29,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-24 23:51:29,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:51:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-24 23:51:29,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:51:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-24 23:51:30,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636795161] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:51:30,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:51:30,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2024-09-24 23:51:30,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637075895] [2024-09-24 23:51:30,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:51:30,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-24 23:51:30,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:30,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-24 23:51:30,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-09-24 23:51:30,121 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 14 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 15 states have call predecessors, (42), 13 states have call successors, (42) [2024-09-24 23:51:30,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:30,463 INFO L93 Difference]: Finished difference Result 167 states and 202 transitions. [2024-09-24 23:51:30,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-24 23:51:30,463 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 14 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 15 states have call predecessors, (42), 13 states have call successors, (42) Word has length 93 [2024-09-24 23:51:30,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:30,465 INFO L225 Difference]: With dead ends: 167 [2024-09-24 23:51:30,465 INFO L226 Difference]: Without dead ends: 104 [2024-09-24 23:51:30,465 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2024-09-24 23:51:30,466 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 60 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:51:30,467 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 417 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:51:30,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-09-24 23:51:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2024-09-24 23:51:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 60 states have (on average 1.05) internal successors, (63), 63 states have internal predecessors, (63), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-24 23:51:30,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2024-09-24 23:51:30,514 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 93 [2024-09-24 23:51:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:30,515 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2024-09-24 23:51:30,515 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 14 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 15 states have call predecessors, (42), 13 states have call successors, (42) [2024-09-24 23:51:30,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2024-09-24 23:51:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-24 23:51:30,517 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:30,517 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:51:30,533 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-24 23:51:30,718 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 [2024-09-24 23:51:30,719 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:30,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:30,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1803901173, now seen corresponding path program 1 times [2024-09-24 23:51:30,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:30,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707576049] [2024-09-24 23:51:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:30,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:51:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:51:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-24 23:51:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-24 23:51:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-24 23:51:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-24 23:51:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-24 23:51:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-24 23:51:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-24 23:51:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-24 23:51:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-24 23:51:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-24 23:51:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-24 23:51:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-24 23:51:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-24 23:51:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2024-09-24 23:51:30,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:30,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707576049] [2024-09-24 23:51:30,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707576049] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:51:30,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544940587] [2024-09-24 23:51:30,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:30,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:51:30,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:51:30,889 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) [2024-09-24 23:51:30,891 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-24 23:51:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:30,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-24 23:51:30,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:51:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2024-09-24 23:51:31,054 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:51:31,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544940587] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:51:31,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:51:31,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-09-24 23:51:31,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312157016] [2024-09-24 23:51:31,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:51:31,055 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:51:31,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:51:31,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-24 23:51:31,056 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-24 23:51:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:31,140 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2024-09-24 23:51:31,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:51:31,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 93 [2024-09-24 23:51:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:31,142 INFO L225 Difference]: With dead ends: 118 [2024-09-24 23:51:31,142 INFO L226 Difference]: Without dead ends: 84 [2024-09-24 23:51:31,142 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:51:31,143 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:51:31,143 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 133 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:51:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-24 23:51:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-09-24 23:51:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 52 states have internal predecessors, (52), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-24 23:51:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2024-09-24 23:51:31,176 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 93 [2024-09-24 23:51:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:31,176 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2024-09-24 23:51:31,176 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-24 23:51:31,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:31,177 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2024-09-24 23:51:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-24 23:51:31,178 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:31,178 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 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] [2024-09-24 23:51:31,194 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-24 23:51:31,378 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 [2024-09-24 23:51:31,379 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:31,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:31,379 INFO L85 PathProgramCache]: Analyzing trace with hash 334767440, now seen corresponding path program 2 times [2024-09-24 23:51:31,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:31,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950324991] [2024-09-24 23:51:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:31,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:51:31,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586627249] [2024-09-24 23:51:31,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:51:31,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:51:31,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:51:31,404 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) [2024-09-24 23:51:31,405 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-24 23:51:31,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:51:31,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:51:31,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-24 23:51:31,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:51:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 28 proven. 26 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-24 23:51:31,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:51:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 28 proven. 26 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-24 23:51:50,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:50,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950324991] [2024-09-24 23:51:50,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:51:50,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586627249] [2024-09-24 23:51:50,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586627249] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:51:50,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:51:50,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-24 23:51:50,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887178483] [2024-09-24 23:51:50,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:51:50,219 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-24 23:51:50,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:50,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-24 23:51:50,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:51:50,219 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 7 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) [2024-09-24 23:51:50,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:50,391 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2024-09-24 23:51:50,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:51:50,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 7 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) Word has length 98 [2024-09-24 23:51:50,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:50,392 INFO L225 Difference]: With dead ends: 94 [2024-09-24 23:51:50,392 INFO L226 Difference]: Without dead ends: 92 [2024-09-24 23:51:50,392 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:51:50,393 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:51:50,393 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 297 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:51:50,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-24 23:51:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-09-24 23:51:50,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 58 states have internal predecessors, (58), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-24 23:51:50,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2024-09-24 23:51:50,413 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 98 [2024-09-24 23:51:50,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:50,414 INFO L474 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2024-09-24 23:51:50,414 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 7 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) [2024-09-24 23:51:50,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2024-09-24 23:51:50,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-24 23:51:50,415 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:50,416 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:51:50,433 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-24 23:51:50,619 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 [2024-09-24 23:51:50,620 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:50,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:50,620 INFO L85 PathProgramCache]: Analyzing trace with hash -943794067, now seen corresponding path program 1 times [2024-09-24 23:51:50,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:50,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560717982] [2024-09-24 23:51:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:50,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:51:50,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719144596] [2024-09-24 23:51:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:50,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:51:50,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:51:50,652 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) [2024-09-24 23:51:50,654 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-24 23:51:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:50,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-24 23:51:50,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:51:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 29 proven. 71 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-24 23:51:51,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:51:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 29 proven. 71 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-24 23:51:51,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:51,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560717982] [2024-09-24 23:51:51,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:51:51,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719144596] [2024-09-24 23:51:51,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719144596] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:51:51,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:51:51,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2024-09-24 23:51:51,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917524331] [2024-09-24 23:51:51,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:51:51,889 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-24 23:51:51,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:51,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-24 23:51:51,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2024-09-24 23:51:51,890 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 14 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2024-09-24 23:51:52,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:52,160 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2024-09-24 23:51:52,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-24 23:51:52,160 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 14 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) Word has length 104 [2024-09-24 23:51:52,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:52,161 INFO L225 Difference]: With dead ends: 98 [2024-09-24 23:51:52,162 INFO L226 Difference]: Without dead ends: 94 [2024-09-24 23:51:52,163 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2024-09-24 23:51:52,163 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 3 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:51:52,163 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 330 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:51:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-24 23:51:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-09-24 23:51:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 59 states have (on average 1.0) internal successors, (59), 59 states have internal predecessors, (59), 20 states have call successors, (20), 16 states have call predecessors, (20), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-24 23:51:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2024-09-24 23:51:52,184 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 104 [2024-09-24 23:51:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:52,185 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2024-09-24 23:51:52,186 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 14 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2024-09-24 23:51:52,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:52,186 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2024-09-24 23:51:52,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-24 23:51:52,187 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:51:52,187 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-24 23:51:52,204 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-24 23:51:52,388 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 [2024-09-24 23:51:52,388 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:51:52,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:52,388 INFO L85 PathProgramCache]: Analyzing trace with hash -972326764, now seen corresponding path program 1 times [2024-09-24 23:51:52,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:51:52,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689016904] [2024-09-24 23:51:52,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:52,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:51:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:51:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:51:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-24 23:51:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-24 23:51:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-24 23:51:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-24 23:51:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-24 23:51:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-24 23:51:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-24 23:51:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-24 23:51:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-24 23:51:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-24 23:51:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-24 23:51:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-24 23:51:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-24 23:51:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-24 23:51:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-24 23:51:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-24 23:51:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-24 23:51:52,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:52,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689016904] [2024-09-24 23:51:52,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689016904] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:51:52,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092189405] [2024-09-24 23:51:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:51:52,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:51:52,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:51:52,774 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) [2024-09-24 23:51:52,775 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-24 23:51:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:51:52,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-24 23:51:52,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:51:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 31 proven. 74 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-09-24 23:51:53,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:51:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 31 proven. 74 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-09-24 23:51:54,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092189405] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:51:54,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:51:54,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 29 [2024-09-24 23:51:54,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574974291] [2024-09-24 23:51:54,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:51:54,848 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-24 23:51:54,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:54,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-24 23:51:54,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2024-09-24 23:51:54,850 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 16 states have call predecessors, (49), 17 states have call successors, (49) [2024-09-24 23:51:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:51:55,124 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2024-09-24 23:51:55,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-24 23:51:55,125 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 16 states have call predecessors, (49), 17 states have call successors, (49) Word has length 109 [2024-09-24 23:51:55,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:51:55,126 INFO L225 Difference]: With dead ends: 94 [2024-09-24 23:51:55,126 INFO L226 Difference]: Without dead ends: 0 [2024-09-24 23:51:55,126 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2024-09-24 23:51:55,127 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:51:55,127 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 342 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:51:55,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-24 23:51:55,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-24 23:51:55,127 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) [2024-09-24 23:51:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-24 23:51:55,128 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2024-09-24 23:51:55,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:51:55,128 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-24 23:51:55,128 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 16 states have call predecessors, (49), 17 states have call successors, (49) [2024-09-24 23:51:55,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:51:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-24 23:51:55,129 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-24 23:51:55,131 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-24 23:51:55,145 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-24 23:51:55,336 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 [2024-09-24 23:51:55,339 INFO L408 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:51:55,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-24 23:51:56,175 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-24 23:51:56,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 11:51:56 BoogieIcfgContainer [2024-09-24 23:51:56,200 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-24 23:51:56,200 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-24 23:51:56,200 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-24 23:51:56,201 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-24 23:51:56,201 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:51:19" (3/4) ... [2024-09-24 23:51:56,202 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-24 23:51:56,246 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-24 23:51:56,247 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-24 23:51:56,247 INFO L158 Benchmark]: Toolchain (without parser) took 36951.38ms. Allocated memory was 163.6MB in the beginning and 218.1MB in the end (delta: 54.5MB). Free memory was 107.4MB in the beginning and 151.4MB in the end (delta: -44.1MB). Peak memory consumption was 11.1MB. Max. memory is 16.1GB. [2024-09-24 23:51:56,247 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 163.6MB. Free memory is still 126.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-24 23:51:56,247 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.86ms. Allocated memory is still 163.6MB. Free memory was 107.4MB in the beginning and 95.6MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-24 23:51:56,248 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.69ms. Allocated memory is still 163.6MB. Free memory was 95.6MB in the beginning and 94.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-24 23:51:56,248 INFO L158 Benchmark]: Boogie Preprocessor took 33.85ms. Allocated memory is still 163.6MB. Free memory was 94.2MB in the beginning and 92.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-24 23:51:56,248 INFO L158 Benchmark]: RCFGBuilder took 361.05ms. Allocated memory is still 163.6MB. Free memory was 92.7MB in the beginning and 78.9MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-24 23:51:56,248 INFO L158 Benchmark]: TraceAbstraction took 36247.20ms. Allocated memory was 163.6MB in the beginning and 218.1MB in the end (delta: 54.5MB). Free memory was 78.0MB in the beginning and 153.5MB in the end (delta: -75.5MB). Peak memory consumption was 78.7MB. Max. memory is 16.1GB. [2024-09-24 23:51:56,248 INFO L158 Benchmark]: Witness Printer took 46.09ms. Allocated memory is still 218.1MB. Free memory was 153.5MB in the beginning and 151.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-24 23:51:56,250 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 163.6MB. Free memory is still 126.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 239.86ms. Allocated memory is still 163.6MB. Free memory was 107.4MB in the beginning and 95.6MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 16.69ms. Allocated memory is still 163.6MB. Free memory was 95.6MB in the beginning and 94.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.85ms. Allocated memory is still 163.6MB. Free memory was 94.2MB in the beginning and 92.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 361.05ms. Allocated memory is still 163.6MB. Free memory was 92.7MB in the beginning and 78.9MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 36247.20ms. Allocated memory was 163.6MB in the beginning and 218.1MB in the end (delta: 54.5MB). Free memory was 78.0MB in the beginning and 153.5MB in the end (delta: -75.5MB). Peak memory consumption was 78.7MB. Max. memory is 16.1GB. * Witness Printer took 46.09ms. Allocated memory is still 218.1MB. Free memory was 153.5MB in the beginning and 151.4MB 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, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 35.3s, OverallIterations: 15, TraceHistogramMax: 17, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 210 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 173 mSDsluCounter, 2865 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2319 mSDsCounter, 214 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1941 IncrementalHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 214 mSolverCounterUnsat, 546 mSDtfsCounter, 1941 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1701 GetRequests, 1519 SyntacticMatches, 9 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=8, InterpolantAutomatonStates: 123, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 48 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 28.2s InterpolantComputationTime, 1732 NumberOfCodeBlocks, 1732 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1927 ConstructedInterpolants, 0 QuantifiedInterpolants, 19021 SizeOfPredicates, 20 NumberOfNonLiveVariables, 2052 ConjunctsInSsa, 260 ConjunctsInUnsatCore, 27 InterpolantComputations, 8 PerfectInterpolantSequences, 6268/6871 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: 44]: Loop Invariant Derived loop invariant: (((((((((((r == 0) && (A == 2)) && (q == 2)) && (d == 1)) && (B == 1)) && (p == 1)) || (((((A == r) && (p == 2)) && (d == 2)) && (q == 0)) && (B == 1))) || ((((((r == 0) && (A == 2)) && (q == 2)) && (p == 2)) && (d == 2)) && (B == 1))) || (((((A == ((long long) r + 1)) && (d == 1)) && (B == 1)) && (q == 1)) && (p == 1))) || (((((A == r) && (d == 1)) && (q == 0)) && (B == 1)) && (p == 1))) || ((((((A == 2) && (r == 2)) && (d == 4)) && (q == 0)) && (B == 1)) && (p == 4))) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((((A == r) && (p == 2)) && (1 <= r)) && (d == 2)) && (r <= 2)) && (q == 0)) && (B == 1)) || (((((((0 <= A) && (A == r)) && (d == 1)) && (r <= 2)) && (q == 0)) && (B == 1)) && (p == 1))) || ((((((A == 2) && (r == 2)) && (d == 4)) && (q == 0)) && (B == 1)) && (p == 4))) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (cond != 0) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (cond != 0) Ensures: (cond != 0) RESULT: Ultimate proved your program to be correct! [2024-09-24 23:51:56,288 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