./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound1.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 008f13fd1550f54b25db8c20ee30759d3819e45d65744da9f4f77718b68e7e66 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:10:08,521 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:10:08,605 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:10:08,610 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:10:08,611 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:10:08,645 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:10:08,646 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:10:08,646 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:10:08,647 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:10:08,647 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:10:08,647 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:10:08,648 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:10:08,651 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:10:08,651 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:10:08,652 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:10:08,652 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:10:08,652 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:10:08,653 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:10:08,653 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:10:08,653 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:10:08,654 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:10:08,655 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:10:08,655 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:10:08,655 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:10:08,656 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:10:08,656 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:10:08,656 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:10:08,657 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:10:08,657 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:10:08,658 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:10:08,658 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:10:08,658 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:10:08,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:10:08,659 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:10:08,659 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:10:08,660 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:10:08,660 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:10:08,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:10:08,661 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:10:08,661 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:10:08,661 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:10:08,662 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:10:08,662 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 008f13fd1550f54b25db8c20ee30759d3819e45d65744da9f4f77718b68e7e66 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:10:09,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:10:09,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:10:09,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:10:09,028 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:10:09,028 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:10:09,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound1.c [2024-09-15 19:10:10,688 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:10:10,873 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:10:10,874 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound1.c [2024-09-15 19:10:10,881 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6a8f8871c/5c1337d0e0cf48afb1b88b4f5c600d1a/FLAG8ccb938fd [2024-09-15 19:10:11,266 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6a8f8871c/5c1337d0e0cf48afb1b88b4f5c600d1a [2024-09-15 19:10:11,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:10:11,270 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:10:11,271 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:10:11,271 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:10:11,276 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:10:11,277 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:10:11" (1/1) ... [2024-09-15 19:10:11,278 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74e1aeed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11, skipping insertion in model container [2024-09-15 19:10:11,278 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:10:11" (1/1) ... [2024-09-15 19:10:11,299 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:10:11,455 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/egcd-ll_valuebound1.c[489,502] [2024-09-15 19:10:11,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:10:11,505 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:10:11,518 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/egcd-ll_valuebound1.c[489,502] [2024-09-15 19:10:11,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:10:11,549 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:10:11,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11 WrapperNode [2024-09-15 19:10:11,550 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:10:11,552 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:10:11,552 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:10:11,553 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:10:11,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11" (1/1) ... [2024-09-15 19:10:11,566 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11" (1/1) ... [2024-09-15 19:10:11,573 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:10:11,573 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:10:11,575 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:10:11,575 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:10:11,575 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:10:11,586 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11" (1/1) ... [2024-09-15 19:10:11,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11" (1/1) ... [2024-09-15 19:10:11,588 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11" (1/1) ... [2024-09-15 19:10:11,612 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-15 19:10:11,612 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11" (1/1) ... [2024-09-15 19:10:11,613 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11" (1/1) ... [2024-09-15 19:10:11,620 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11" (1/1) ... [2024-09-15 19:10:11,624 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11" (1/1) ... [2024-09-15 19:10:11,628 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11" (1/1) ... [2024-09-15 19:10:11,629 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11" (1/1) ... [2024-09-15 19:10:11,633 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:10:11,634 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:10:11,634 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:10:11,634 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:10:11,635 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11" (1/1) ... [2024-09-15 19:10:11,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:10:11,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:10:11,675 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) [2024-09-15 19:10:11,681 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 [2024-09-15 19:10:11,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:10:11,732 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:10:11,732 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:10:11,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:10:11,732 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:10:11,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:10:11,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:10:11,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:10:11,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:10:11,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:10:11,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:10:11,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:10:11,806 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:10:11,809 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:10:12,028 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-15 19:10:12,029 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:10:12,056 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:10:12,056 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-15 19:10:12,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:10:12 BoogieIcfgContainer [2024-09-15 19:10:12,057 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:10:12,058 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:10:12,059 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:10:12,062 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:10:12,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:10:11" (1/3) ... [2024-09-15 19:10:12,064 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ca8b44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:10:12, skipping insertion in model container [2024-09-15 19:10:12,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:10:11" (2/3) ... [2024-09-15 19:10:12,064 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ca8b44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:10:12, skipping insertion in model container [2024-09-15 19:10:12,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:10:12" (3/3) ... [2024-09-15 19:10:12,066 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound1.c [2024-09-15 19:10:12,083 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:10:12,083 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:10:12,150 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:10:12,159 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;@37a78a35, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:10:12,160 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:10:12,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-15 19:10:12,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-15 19:10:12,172 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:10:12,173 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:10:12,173 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:10:12,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:12,181 INFO L85 PathProgramCache]: Analyzing trace with hash 963610160, now seen corresponding path program 1 times [2024-09-15 19:10:12,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:10:12,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652985083] [2024-09-15 19:10:12,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:12,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:10:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:12,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:10:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:12,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:10:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:12,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:10:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:12,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:10:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:12,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:10:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 19:10:12,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:10:12,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652985083] [2024-09-15 19:10:12,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652985083] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:10:12,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:10:12,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 19:10:12,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542661236] [2024-09-15 19:10:12,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:10:12,427 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 19:10:12,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:10:12,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 19:10:12,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:10:12,449 INFO L87 Difference]: Start difference. First operand has 35 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:10:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:10:12,478 INFO L93 Difference]: Finished difference Result 64 states and 102 transitions. [2024-09-15 19:10:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 19:10:12,481 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-15 19:10:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:10:12,488 INFO L225 Difference]: With dead ends: 64 [2024-09-15 19:10:12,488 INFO L226 Difference]: Without dead ends: 31 [2024-09-15 19:10:12,492 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:10:12,495 INFO L434 NwaCegarLoop]: 43 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, 43 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 [2024-09-15 19:10:12,496 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:10:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-15 19:10:12,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-15 19:10:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-15 19:10:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-09-15 19:10:12,535 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 32 [2024-09-15 19:10:12,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:10:12,536 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-09-15 19:10:12,536 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:10:12,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:12,537 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-09-15 19:10:12,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-15 19:10:12,539 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:10:12,539 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:10:12,539 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:10:12,539 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:10:12,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:12,540 INFO L85 PathProgramCache]: Analyzing trace with hash -914175556, now seen corresponding path program 1 times [2024-09-15 19:10:12,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:10:12,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802262638] [2024-09-15 19:10:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:12,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:10:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:10:12,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733669688] [2024-09-15 19:10:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:12,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:10:12,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:10:12,587 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) [2024-09-15 19:10:12,589 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:10:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:12,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 19:10:12,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:10:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 19:10:12,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:10:12,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:10:12,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802262638] [2024-09-15 19:10:12,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:10:12,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733669688] [2024-09-15 19:10:12,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733669688] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:10:12,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:10:12,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:10:12,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103555251] [2024-09-15 19:10:12,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:10:12,839 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:10:12,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:10:12,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:10:12,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:10:12,841 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-15 19:10:12,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:10:12,991 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2024-09-15 19:10:12,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:10:12,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2024-09-15 19:10:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:10:12,995 INFO L225 Difference]: With dead ends: 47 [2024-09-15 19:10:12,996 INFO L226 Difference]: Without dead ends: 45 [2024-09-15 19:10:12,997 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:10:12,999 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:10:13,000 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 129 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:10:13,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-15 19:10:13,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2024-09-15 19:10:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-15 19:10:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2024-09-15 19:10:13,025 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 32 [2024-09-15 19:10:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:10:13,026 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2024-09-15 19:10:13,027 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-15 19:10:13,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:13,028 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2024-09-15 19:10:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-15 19:10:13,031 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:10:13,031 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:10:13,051 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:10:13,236 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:10:13,237 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:10:13,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:13,238 INFO L85 PathProgramCache]: Analyzing trace with hash 737940505, now seen corresponding path program 1 times [2024-09-15 19:10:13,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:10:13,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883769678] [2024-09-15 19:10:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:13,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:10:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:10:13,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307287957] [2024-09-15 19:10:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:13,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:10:13,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:10:13,267 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) [2024-09-15 19:10:13,269 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:10:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:13,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 19:10:13,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:10:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 19:10:13,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:10:13,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:10:13,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883769678] [2024-09-15 19:10:13,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:10:13,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307287957] [2024-09-15 19:10:13,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307287957] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:10:13,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:10:13,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:10:13,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426495055] [2024-09-15 19:10:13,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:10:13,439 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:10:13,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:10:13,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:10:13,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:10:13,441 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-15 19:10:13,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:10:13,530 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2024-09-15 19:10:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:10:13,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-15 19:10:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:10:13,532 INFO L225 Difference]: With dead ends: 51 [2024-09-15 19:10:13,532 INFO L226 Difference]: Without dead ends: 49 [2024-09-15 19:10:13,532 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:10:13,533 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:10:13,534 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 131 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:10:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-15 19:10:13,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-09-15 19:10:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-15 19:10:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2024-09-15 19:10:13,564 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 37 [2024-09-15 19:10:13,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:10:13,565 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2024-09-15 19:10:13,565 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-15 19:10:13,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:13,566 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2024-09-15 19:10:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-15 19:10:13,567 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:10:13,568 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:10:13,582 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 19:10:13,768 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:10:13,769 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:10:13,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:13,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1385223068, now seen corresponding path program 1 times [2024-09-15 19:10:13,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:10:13,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862034579] [2024-09-15 19:10:13,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:13,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:10:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:10:13,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781079181] [2024-09-15 19:10:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:13,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:10:13,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:10:13,804 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) [2024-09-15 19:10:13,805 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:10:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:13,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 19:10:13,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:10:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-15 19:10:13,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:10:13,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:10:13,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862034579] [2024-09-15 19:10:13,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:10:13,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781079181] [2024-09-15 19:10:13,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781079181] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:10:13,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:10:13,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:10:13,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745978097] [2024-09-15 19:10:13,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:10:13,963 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:10:13,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:10:13,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:10:13,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:10:13,965 INFO L87 Difference]: Start difference. First operand 48 states and 64 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-15 19:10:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:10:14,059 INFO L93 Difference]: Finished difference Result 73 states and 104 transitions. [2024-09-15 19:10:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:10:14,060 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-09-15 19:10:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:10:14,065 INFO L225 Difference]: With dead ends: 73 [2024-09-15 19:10:14,066 INFO L226 Difference]: Without dead ends: 69 [2024-09-15 19:10:14,066 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:10:14,068 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:10:14,071 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:10:14,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-15 19:10:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-15 19:10:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-15 19:10:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2024-09-15 19:10:14,094 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 42 [2024-09-15 19:10:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:10:14,094 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2024-09-15 19:10:14,094 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-15 19:10:14,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2024-09-15 19:10:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-15 19:10:14,096 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:10:14,096 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2024-09-15 19:10:14,116 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 19:10:14,301 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:10:14,302 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:10:14,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:14,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1071635405, now seen corresponding path program 1 times [2024-09-15 19:10:14,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:10:14,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315872756] [2024-09-15 19:10:14,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:14,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:10:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:10:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:10:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:10:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:10:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:10:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:10:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:10:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-15 19:10:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-15 19:10:14,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:10:14,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315872756] [2024-09-15 19:10:14,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315872756] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:10:14,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:10:14,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:10:14,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116837841] [2024-09-15 19:10:14,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:10:14,559 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:10:14,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:10:14,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:10:14,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:10:14,560 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-09-15 19:10:14,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:10:14,621 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2024-09-15 19:10:14,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:10:14,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 48 [2024-09-15 19:10:14,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:10:14,623 INFO L225 Difference]: With dead ends: 75 [2024-09-15 19:10:14,623 INFO L226 Difference]: Without dead ends: 73 [2024-09-15 19:10:14,624 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:10:14,625 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:10:14,625 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 140 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:10:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-15 19:10:14,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-15 19:10:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 39 states have internal predecessors, (44), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-15 19:10:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2024-09-15 19:10:14,641 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 48 [2024-09-15 19:10:14,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:10:14,641 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2024-09-15 19:10:14,642 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-09-15 19:10:14,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:14,642 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2024-09-15 19:10:14,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-15 19:10:14,656 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:10:14,656 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:10:14,656 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-15 19:10:14,656 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:10:14,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:14,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1501538128, now seen corresponding path program 1 times [2024-09-15 19:10:14,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:10:14,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652157173] [2024-09-15 19:10:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:14,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:10:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:10:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:10:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:10:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:10:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:10:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:10:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:10:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-15 19:10:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 19:10:14,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:10:15,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652157173] [2024-09-15 19:10:15,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652157173] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:10:15,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936834794] [2024-09-15 19:10:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:15,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:10:15,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:10:15,002 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) [2024-09-15 19:10:15,004 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:10:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:15,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 19:10:15,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:10:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-15 19:10:15,182 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:10:15,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936834794] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:10:15,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:10:15,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2024-09-15 19:10:15,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029883766] [2024-09-15 19:10:15,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:10:15,184 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:10:15,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:10:15,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:10:15,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-15 19:10:15,186 INFO L87 Difference]: Start difference. First operand 73 states and 100 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) [2024-09-15 19:10:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:10:15,252 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2024-09-15 19:10:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:10:15,253 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 50 [2024-09-15 19:10:15,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:10:15,256 INFO L225 Difference]: With dead ends: 83 [2024-09-15 19:10:15,256 INFO L226 Difference]: Without dead ends: 80 [2024-09-15 19:10:15,257 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:10:15,259 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:10:15,260 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 132 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:10:15,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-15 19:10:15,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2024-09-15 19:10:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 44 states have internal predecessors, (50), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-15 19:10:15,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-15 19:10:15,288 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 50 [2024-09-15 19:10:15,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:10:15,289 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-15 19:10:15,289 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) [2024-09-15 19:10:15,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:15,290 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-15 19:10:15,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-15 19:10:15,291 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:10:15,292 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2024-09-15 19:10:15,309 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-15 19:10:15,496 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:10:15,497 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:10:15,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:15,497 INFO L85 PathProgramCache]: Analyzing trace with hash 789508930, now seen corresponding path program 1 times [2024-09-15 19:10:15,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:10:15,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403581508] [2024-09-15 19:10:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:15,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:10:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:15,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:10:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:15,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:10:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:15,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:10:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:15,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:10:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:15,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:10:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:15,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:10:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:15,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:10:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:15,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-15 19:10:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:15,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-15 19:10:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-15 19:10:15,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:10:15,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403581508] [2024-09-15 19:10:15,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403581508] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:10:15,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870267469] [2024-09-15 19:10:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:15,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:10:15,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:10:15,843 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) [2024-09-15 19:10:15,845 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:10:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:15,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 19:10:15,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:10:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-15 19:10:16,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:10:16,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870267469] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:10:16,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:10:16,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-15 19:10:16,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736515765] [2024-09-15 19:10:16,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:10:16,026 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 19:10:16,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:10:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 19:10:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:10:16,028 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-15 19:10:16,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:10:16,142 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2024-09-15 19:10:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 19:10:16,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2024-09-15 19:10:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:10:16,145 INFO L225 Difference]: With dead ends: 91 [2024-09-15 19:10:16,146 INFO L226 Difference]: Without dead ends: 87 [2024-09-15 19:10:16,147 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:10:16,148 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:10:16,148 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 157 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:10:16,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-15 19:10:16,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-09-15 19:10:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 states have internal predecessors, (55), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-15 19:10:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2024-09-15 19:10:16,183 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 53 [2024-09-15 19:10:16,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:10:16,183 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2024-09-15 19:10:16,183 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-15 19:10:16,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2024-09-15 19:10:16,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-15 19:10:16,185 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:10:16,185 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:10:16,202 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 19:10:16,389 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-15 19:10:16,390 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:10:16,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:16,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1427018501, now seen corresponding path program 2 times [2024-09-15 19:10:16,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:10:16,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569469521] [2024-09-15 19:10:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:16,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:10:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:16,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:10:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:16,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:10:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:16,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:10:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:16,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:10:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:16,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:10:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:16,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:10:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:16,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:10:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:16,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-15 19:10:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:16,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-15 19:10:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-15 19:10:16,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:10:16,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569469521] [2024-09-15 19:10:16,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569469521] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:10:16,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027984459] [2024-09-15 19:10:16,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:10:16,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:10:16,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:10:16,630 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) [2024-09-15 19:10:16,632 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:10:16,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:10:16,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:10:16,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-15 19:10:16,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:10:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-15 19:10:16,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:10:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-15 19:10:16,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027984459] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:10:16,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:10:16,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-09-15 19:10:16,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493549245] [2024-09-15 19:10:16,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:10:16,925 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-15 19:10:16,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:10:16,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-15 19:10:16,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-09-15 19:10:16,926 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 11 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-15 19:10:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:10:17,075 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2024-09-15 19:10:17,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:10:17,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 11 states have call predecessors, (23), 8 states have call successors, (23) Word has length 55 [2024-09-15 19:10:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:10:17,078 INFO L225 Difference]: With dead ends: 110 [2024-09-15 19:10:17,080 INFO L226 Difference]: Without dead ends: 74 [2024-09-15 19:10:17,081 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:10:17,082 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:10:17,082 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 200 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:10:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-15 19:10:17,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-09-15 19:10:17,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-15 19:10:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2024-09-15 19:10:17,103 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 55 [2024-09-15 19:10:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:10:17,103 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2024-09-15 19:10:17,103 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 11 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-15 19:10:17,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2024-09-15 19:10:17,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-15 19:10:17,105 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:10:17,105 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2024-09-15 19:10:17,124 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-15 19:10:17,305 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:10:17,306 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:10:17,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:17,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1563984878, now seen corresponding path program 1 times [2024-09-15 19:10:17,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:10:17,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473802903] [2024-09-15 19:10:17,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:17,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:10:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:17,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:10:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:17,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:10:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:17,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:10:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:17,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:10:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:17,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:10:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:17,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:10:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:17,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:10:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:17,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-15 19:10:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:17,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-15 19:10:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:17,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-15 19:10:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-15 19:10:17,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:10:17,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473802903] [2024-09-15 19:10:17,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473802903] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:10:17,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294001071] [2024-09-15 19:10:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:10:17,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:10:17,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:10:17,497 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) [2024-09-15 19:10:17,498 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 19:10:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:10:17,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 19:10:17,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:10:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-15 19:10:17,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:10:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-15 19:10:17,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294001071] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:10:17,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:10:17,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-09-15 19:10:17,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420769495] [2024-09-15 19:10:17,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:10:17,840 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-15 19:10:17,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:10:17,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-15 19:10:17,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:10:17,842 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2024-09-15 19:10:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:10:17,944 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2024-09-15 19:10:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:10:17,944 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 60 [2024-09-15 19:10:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:10:17,945 INFO L225 Difference]: With dead ends: 78 [2024-09-15 19:10:17,945 INFO L226 Difference]: Without dead ends: 0 [2024-09-15 19:10:17,946 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:10:17,946 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:10:17,947 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 145 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:10:17,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-15 19:10:17,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-15 19:10:17,948 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) [2024-09-15 19:10:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-15 19:10:17,948 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2024-09-15 19:10:17,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:10:17,948 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-15 19:10:17,948 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2024-09-15 19:10:17,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:10:17,949 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-15 19:10:17,949 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-15 19:10:17,952 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-15 19:10:17,970 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-15 19:10:18,156 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:10:18,160 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:10:18,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-15 19:10:18,513 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-15 19:10:18,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 07:10:18 BoogieIcfgContainer [2024-09-15 19:10:18,528 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-15 19:10:18,528 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-15 19:10:18,528 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-15 19:10:18,528 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-15 19:10:18,529 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:10:12" (3/4) ... [2024-09-15 19:10:18,531 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-15 19:10:18,535 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-15 19:10:18,535 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-09-15 19:10:18,535 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-15 19:10:18,535 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-15 19:10:18,539 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2024-09-15 19:10:18,539 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-09-15 19:10:18,539 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-15 19:10:18,539 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-15 19:10:18,539 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-15 19:10:18,628 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-15 19:10:18,628 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-15 19:10:18,628 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-15 19:10:18,629 INFO L158 Benchmark]: Toolchain (without parser) took 7359.55ms. Allocated memory was 54.5MB in the beginning and 125.8MB in the end (delta: 71.3MB). Free memory was 25.1MB in the beginning and 89.3MB in the end (delta: -64.3MB). Peak memory consumption was 6.0MB. Max. memory is 16.1GB. [2024-09-15 19:10:18,629 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 54.5MB. Free memory is still 31.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 19:10:18,630 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.59ms. Allocated memory was 54.5MB in the beginning and 71.3MB in the end (delta: 16.8MB). Free memory was 24.8MB in the beginning and 43.6MB in the end (delta: -18.8MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. [2024-09-15 19:10:18,630 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.78ms. Allocated memory is still 71.3MB. Free memory was 43.6MB in the beginning and 42.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 19:10:18,630 INFO L158 Benchmark]: Boogie Preprocessor took 58.24ms. Allocated memory is still 71.3MB. Free memory was 42.6MB in the beginning and 40.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-15 19:10:18,631 INFO L158 Benchmark]: RCFGBuilder took 423.27ms. Allocated memory is still 71.3MB. Free memory was 40.9MB in the beginning and 45.0MB in the end (delta: -4.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-15 19:10:18,631 INFO L158 Benchmark]: TraceAbstraction took 6469.15ms. Allocated memory was 71.3MB in the beginning and 125.8MB in the end (delta: 54.5MB). Free memory was 44.3MB in the beginning and 94.5MB in the end (delta: -50.2MB). Peak memory consumption was 52.0MB. Max. memory is 16.1GB. [2024-09-15 19:10:18,631 INFO L158 Benchmark]: Witness Printer took 100.47ms. Allocated memory is still 125.8MB. Free memory was 94.5MB in the beginning and 89.3MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-15 19:10:18,633 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 54.5MB. Free memory is still 31.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.59ms. Allocated memory was 54.5MB in the beginning and 71.3MB in the end (delta: 16.8MB). Free memory was 24.8MB in the beginning and 43.6MB in the end (delta: -18.8MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.78ms. Allocated memory is still 71.3MB. Free memory was 43.6MB in the beginning and 42.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 58.24ms. Allocated memory is still 71.3MB. Free memory was 42.6MB in the beginning and 40.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 423.27ms. Allocated memory is still 71.3MB. Free memory was 40.9MB in the beginning and 45.0MB in the end (delta: -4.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 6469.15ms. Allocated memory was 71.3MB in the beginning and 125.8MB in the end (delta: 54.5MB). Free memory was 44.3MB in the beginning and 94.5MB in the end (delta: -50.2MB). Peak memory consumption was 52.0MB. Max. memory is 16.1GB. * Witness Printer took 100.47ms. Allocated memory is still 125.8MB. Free memory was 94.5MB in the beginning and 89.3MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. 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: 13]: 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, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.0s, OverallIterations: 9, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 92 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 69 mSDsluCounter, 1207 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 896 mSDsCounter, 55 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 389 IncrementalHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 55 mSolverCounterUnsat, 311 mSDtfsCounter, 389 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 589 GetRequests, 522 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=7, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 5 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 738 NumberOfCodeBlocks, 738 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 727 ConstructedInterpolants, 0 QuantifiedInterpolants, 1528 SizeOfPredicates, 13 NumberOfNonLiveVariables, 830 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 15 InterpolantComputations, 7 PerfectInterpolantSequences, 710/759 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: 35]: Loop Invariant Derived loop invariant: ((((((((r == 0) && (y == 1)) && (s == 1)) && (x == 1)) && (b == y)) && (q == 0)) && (a == x)) && (p == 1)) - ProcedureContractResult [Line: 7]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 10]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-15 19:10:18,660 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