./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.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 3d9847fe213bf8df5d23c53d2bc8b53fb384c85820b87c09591484702dabefc3 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 00:20:31,899 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 00:20:31,978 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 00:20:31,984 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 00:20:31,986 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 00:20:32,015 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 00:20:32,015 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 00:20:32,016 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 00:20:32,017 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 00:20:32,018 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 00:20:32,019 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 00:20:32,019 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 00:20:32,020 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 00:20:32,020 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 00:20:32,022 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 00:20:32,023 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 00:20:32,023 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 00:20:32,023 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 00:20:32,024 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 00:20:32,024 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 00:20:32,024 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 00:20:32,027 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 00:20:32,027 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 00:20:32,028 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 00:20:32,028 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 00:20:32,028 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 00:20:32,029 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 00:20:32,029 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 00:20:32,029 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 00:20:32,030 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 00:20:32,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 00:20:32,030 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 00:20:32,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 00:20:32,031 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 00:20:32,031 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 00:20:32,031 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 00:20:32,031 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 00:20:32,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 00:20:32,032 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 00:20:32,032 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 00:20:32,032 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 00:20:32,035 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 00:20:32,035 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d9847fe213bf8df5d23c53d2bc8b53fb384c85820b87c09591484702dabefc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 00:20:32,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 00:20:32,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 00:20:32,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 00:20:32,291 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 00:20:32,292 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 00:20:32,293 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c [2024-09-13 00:20:33,844 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 00:20:34,014 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 00:20:34,015 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c [2024-09-13 00:20:34,023 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c9f49b4ed/140b7fe59259440598abd84219f5d81c/FLAG4e32cb9f9 [2024-09-13 00:20:34,036 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c9f49b4ed/140b7fe59259440598abd84219f5d81c [2024-09-13 00:20:34,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 00:20:34,040 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 00:20:34,041 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 00:20:34,042 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 00:20:34,047 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 00:20:34,047 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 12:20:34" (1/1) ... [2024-09-13 00:20:34,048 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f7748be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34, skipping insertion in model container [2024-09-13 00:20:34,048 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 12:20:34" (1/1) ... [2024-09-13 00:20:34,066 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 00:20:34,205 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c[489,502] [2024-09-13 00:20:34,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 00:20:34,229 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 00:20:34,239 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c[489,502] [2024-09-13 00:20:34,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 00:20:34,260 INFO L204 MainTranslator]: Completed translation [2024-09-13 00:20:34,261 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34 WrapperNode [2024-09-13 00:20:34,261 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 00:20:34,262 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 00:20:34,263 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 00:20:34,263 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 00:20:34,269 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34" (1/1) ... [2024-09-13 00:20:34,276 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34" (1/1) ... [2024-09-13 00:20:34,282 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 00:20:34,282 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 00:20:34,283 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 00:20:34,283 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 00:20:34,283 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 00:20:34,292 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34" (1/1) ... [2024-09-13 00:20:34,293 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34" (1/1) ... [2024-09-13 00:20:34,294 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34" (1/1) ... [2024-09-13 00:20:34,307 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]. [2024-09-13 00:20:34,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34" (1/1) ... [2024-09-13 00:20:34,307 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34" (1/1) ... [2024-09-13 00:20:34,310 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34" (1/1) ... [2024-09-13 00:20:34,313 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34" (1/1) ... [2024-09-13 00:20:34,314 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34" (1/1) ... [2024-09-13 00:20:34,314 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34" (1/1) ... [2024-09-13 00:20:34,316 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 00:20:34,317 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 00:20:34,317 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 00:20:34,317 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 00:20:34,318 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34" (1/1) ... [2024-09-13 00:20:34,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 00:20:34,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:20:34,347 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) [2024-09-13 00:20:34,350 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 [2024-09-13 00:20:34,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 00:20:34,389 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 00:20:34,389 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 00:20:34,389 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 00:20:34,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 00:20:34,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 00:20:34,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 00:20:34,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 00:20:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 00:20:34,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 00:20:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 00:20:34,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 00:20:34,447 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 00:20:34,449 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 00:20:34,661 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-13 00:20:34,663 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 00:20:34,721 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 00:20:34,722 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-13 00:20:34,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:20:34 BoogieIcfgContainer [2024-09-13 00:20:34,723 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 00:20:34,726 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 00:20:34,726 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 00:20:34,729 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 00:20:34,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 12:20:34" (1/3) ... [2024-09-13 00:20:34,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324e7dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 12:20:34, skipping insertion in model container [2024-09-13 00:20:34,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:20:34" (2/3) ... [2024-09-13 00:20:34,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324e7dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 12:20:34, skipping insertion in model container [2024-09-13 00:20:34,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:20:34" (3/3) ... [2024-09-13 00:20:34,734 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound10.c [2024-09-13 00:20:34,753 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 00:20:34,754 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 00:20:34,822 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 00:20:34,832 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;@1d2e667f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 00:20:34,833 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 00:20:34,837 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) [2024-09-13 00:20:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-13 00:20:34,846 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:20:34,847 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] [2024-09-13 00:20:34,847 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:20:34,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash 963610160, now seen corresponding path program 1 times [2024-09-13 00:20:34,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:20:34,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489531281] [2024-09-13 00:20:34,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:34,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:20:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:35,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:20:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:35,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:20:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:35,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:20:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:35,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:20:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:35,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:20:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 00:20:35,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:20:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489531281] [2024-09-13 00:20:35,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489531281] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:20:35,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:20:35,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 00:20:35,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302891021] [2024-09-13 00:20:35,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:20:35,082 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 00:20:35,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:20:35,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 00:20:35,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 00:20:35,113 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) [2024-09-13 00:20:35,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:20:35,139 INFO L93 Difference]: Finished difference Result 64 states and 102 transitions. [2024-09-13 00:20:35,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 00:20:35,142 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 [2024-09-13 00:20:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:20:35,149 INFO L225 Difference]: With dead ends: 64 [2024-09-13 00:20:35,149 INFO L226 Difference]: Without dead ends: 31 [2024-09-13 00:20:35,152 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 [2024-09-13 00:20:35,155 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 [2024-09-13 00:20:35,156 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] [2024-09-13 00:20:35,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-13 00:20:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-13 00:20:35,188 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) [2024-09-13 00:20:35,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-09-13 00:20:35,192 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 32 [2024-09-13 00:20:35,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:20:35,192 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-09-13 00:20:35,192 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) [2024-09-13 00:20:35,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:35,193 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-09-13 00:20:35,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-13 00:20:35,195 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:20:35,195 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] [2024-09-13 00:20:35,195 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 00:20:35,196 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:20:35,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:35,196 INFO L85 PathProgramCache]: Analyzing trace with hash -914175556, now seen corresponding path program 1 times [2024-09-13 00:20:35,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:20:35,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926303511] [2024-09-13 00:20:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:35,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:20:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:20:35,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515664993] [2024-09-13 00:20:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:35,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:20:35,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:20:35,233 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) [2024-09-13 00:20:35,235 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 00:20:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:35,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:20:35,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:20:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 00:20:35,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:20:35,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:20:35,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926303511] [2024-09-13 00:20:35,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:20:35,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515664993] [2024-09-13 00:20:35,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515664993] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:20:35,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:20:35,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:20:35,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813222921] [2024-09-13 00:20:35,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:20:35,439 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:20:35,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:20:35,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:20:35,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:20:35,441 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) [2024-09-13 00:20:35,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:20:35,520 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2024-09-13 00:20:35,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:20:35,521 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 [2024-09-13 00:20:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:20:35,522 INFO L225 Difference]: With dead ends: 47 [2024-09-13 00:20:35,522 INFO L226 Difference]: Without dead ends: 45 [2024-09-13 00:20:35,523 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 [2024-09-13 00:20:35,524 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:20:35,524 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 129 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:20:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-13 00:20:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2024-09-13 00:20:35,542 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) [2024-09-13 00:20:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2024-09-13 00:20:35,544 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 32 [2024-09-13 00:20:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:20:35,545 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2024-09-13 00:20:35,545 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) [2024-09-13 00:20:35,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:35,546 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2024-09-13 00:20:35,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-13 00:20:35,547 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:20:35,547 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] [2024-09-13 00:20:35,566 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 00:20:35,751 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 [2024-09-13 00:20:35,752 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:20:35,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:35,753 INFO L85 PathProgramCache]: Analyzing trace with hash 737940505, now seen corresponding path program 1 times [2024-09-13 00:20:35,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:20:35,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649664198] [2024-09-13 00:20:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:35,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:20:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:20:35,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910835472] [2024-09-13 00:20:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:35,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:20:35,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:20:35,800 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) [2024-09-13 00:20:35,802 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 00:20:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:35,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:20:35,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:20:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 00:20:35,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:20:35,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:20:35,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649664198] [2024-09-13 00:20:35,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:20:35,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910835472] [2024-09-13 00:20:35,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910835472] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:20:35,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:20:35,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:20:35,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835667780] [2024-09-13 00:20:35,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:20:35,953 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:20:35,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:20:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:20:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:20:35,957 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) [2024-09-13 00:20:36,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:20:36,039 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2024-09-13 00:20:36,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:20:36,040 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 [2024-09-13 00:20:36,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:20:36,042 INFO L225 Difference]: With dead ends: 51 [2024-09-13 00:20:36,043 INFO L226 Difference]: Without dead ends: 49 [2024-09-13 00:20:36,043 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 [2024-09-13 00:20:36,044 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 [2024-09-13 00:20:36,045 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] [2024-09-13 00:20:36,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-13 00:20:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-09-13 00:20:36,063 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) [2024-09-13 00:20:36,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2024-09-13 00:20:36,068 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 37 [2024-09-13 00:20:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:20:36,069 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2024-09-13 00:20:36,069 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) [2024-09-13 00:20:36,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:36,070 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2024-09-13 00:20:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 00:20:36,075 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:20:36,075 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] [2024-09-13 00:20:36,092 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 00:20:36,275 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 [2024-09-13 00:20:36,276 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:20:36,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:36,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1385223068, now seen corresponding path program 1 times [2024-09-13 00:20:36,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:20:36,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538221581] [2024-09-13 00:20:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:36,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:20:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:20:36,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301993220] [2024-09-13 00:20:36,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:36,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:20:36,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:20:36,316 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) [2024-09-13 00:20:36,317 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 00:20:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:36,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:20:36,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:20:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 00:20:36,455 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:20:36,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:20:36,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538221581] [2024-09-13 00:20:36,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:20:36,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301993220] [2024-09-13 00:20:36,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301993220] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:20:36,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:20:36,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:20:36,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822975301] [2024-09-13 00:20:36,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:20:36,458 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:20:36,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:20:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:20:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:20:36,459 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) [2024-09-13 00:20:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:20:36,561 INFO L93 Difference]: Finished difference Result 73 states and 104 transitions. [2024-09-13 00:20:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:20:36,562 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 [2024-09-13 00:20:36,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:20:36,565 INFO L225 Difference]: With dead ends: 73 [2024-09-13 00:20:36,567 INFO L226 Difference]: Without dead ends: 69 [2024-09-13 00:20:36,568 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 [2024-09-13 00:20:36,569 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 [2024-09-13 00:20:36,571 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] [2024-09-13 00:20:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-13 00:20:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-13 00:20:36,599 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) [2024-09-13 00:20:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2024-09-13 00:20:36,603 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 42 [2024-09-13 00:20:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:20:36,604 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2024-09-13 00:20:36,604 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) [2024-09-13 00:20:36,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2024-09-13 00:20:36,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 00:20:36,605 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:20:36,605 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] [2024-09-13 00:20:36,621 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 00:20:36,806 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 [2024-09-13 00:20:36,807 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:20:36,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1071635405, now seen corresponding path program 1 times [2024-09-13 00:20:36,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:20:36,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867584067] [2024-09-13 00:20:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:36,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:20:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:36,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:20:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:36,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:20:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:36,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:20:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:36,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:20:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:36,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:20:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:36,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 00:20:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-13 00:20:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 00:20:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 00:20:37,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:20:37,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867584067] [2024-09-13 00:20:37,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867584067] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:20:37,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:20:37,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:20:37,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30657967] [2024-09-13 00:20:37,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:20:37,024 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:20:37,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:20:37,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:20:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:20:37,025 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) [2024-09-13 00:20:37,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:20:37,080 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2024-09-13 00:20:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:20:37,080 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 [2024-09-13 00:20:37,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:20:37,082 INFO L225 Difference]: With dead ends: 75 [2024-09-13 00:20:37,082 INFO L226 Difference]: Without dead ends: 73 [2024-09-13 00:20:37,082 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 [2024-09-13 00:20:37,083 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 [2024-09-13 00:20:37,083 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] [2024-09-13 00:20:37,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-13 00:20:37,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-13 00:20:37,102 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) [2024-09-13 00:20:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2024-09-13 00:20:37,104 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 48 [2024-09-13 00:20:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:20:37,104 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2024-09-13 00:20:37,104 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) [2024-09-13 00:20:37,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2024-09-13 00:20:37,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-13 00:20:37,106 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:20:37,106 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] [2024-09-13 00:20:37,108 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-13 00:20:37,108 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:20:37,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:37,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1501538128, now seen corresponding path program 1 times [2024-09-13 00:20:37,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:20:37,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681315404] [2024-09-13 00:20:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:37,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:20:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:20:37,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131441486] [2024-09-13 00:20:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:37,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:20:37,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:20:37,153 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) [2024-09-13 00:20:37,154 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 00:20:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 00:20:37,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:20:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-13 00:20:37,308 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:20:37,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:20:37,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681315404] [2024-09-13 00:20:37,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:20:37,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131441486] [2024-09-13 00:20:37,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131441486] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:20:37,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:20:37,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:20:37,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826580611] [2024-09-13 00:20:37,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:20:37,309 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:20:37,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:20:37,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:20:37,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:20:37,310 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) [2024-09-13 00:20:37,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:20:37,373 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2024-09-13 00:20:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:20:37,374 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 [2024-09-13 00:20:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:20:37,375 INFO L225 Difference]: With dead ends: 83 [2024-09-13 00:20:37,375 INFO L226 Difference]: Without dead ends: 80 [2024-09-13 00:20:37,375 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:20:37,376 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 [2024-09-13 00:20:37,376 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] [2024-09-13 00:20:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-13 00:20:37,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2024-09-13 00:20:37,392 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) [2024-09-13 00:20:37,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-13 00:20:37,394 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 50 [2024-09-13 00:20:37,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:20:37,395 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-13 00:20:37,395 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) [2024-09-13 00:20:37,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-13 00:20:37,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-13 00:20:37,396 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:20:37,396 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] [2024-09-13 00:20:37,414 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 00:20:37,597 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 [2024-09-13 00:20:37,597 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:20:37,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:37,598 INFO L85 PathProgramCache]: Analyzing trace with hash 789508930, now seen corresponding path program 1 times [2024-09-13 00:20:37,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:20:37,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888771113] [2024-09-13 00:20:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:37,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:20:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:20:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:20:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:20:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:20:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:20:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 00:20:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-13 00:20:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 00:20:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-13 00:20:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-13 00:20:37,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:20:37,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888771113] [2024-09-13 00:20:37,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888771113] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:20:37,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205807023] [2024-09-13 00:20:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:37,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:20:37,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:20:37,849 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) [2024-09-13 00:20:37,854 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 00:20:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:37,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 00:20:37,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:20:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-13 00:20:38,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:20:38,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205807023] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:20:38,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:20:38,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-13 00:20:38,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624301590] [2024-09-13 00:20:38,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:20:38,036 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 00:20:38,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:20:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 00:20:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-13 00:20:38,037 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) [2024-09-13 00:20:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:20:38,136 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2024-09-13 00:20:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 00:20:38,137 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 [2024-09-13 00:20:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:20:38,138 INFO L225 Difference]: With dead ends: 91 [2024-09-13 00:20:38,138 INFO L226 Difference]: Without dead ends: 87 [2024-09-13 00:20:38,138 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 [2024-09-13 00:20:38,139 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 [2024-09-13 00:20:38,139 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] [2024-09-13 00:20:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-13 00:20:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-09-13 00:20:38,157 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) [2024-09-13 00:20:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2024-09-13 00:20:38,160 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 53 [2024-09-13 00:20:38,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:20:38,160 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2024-09-13 00:20:38,160 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) [2024-09-13 00:20:38,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:38,165 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2024-09-13 00:20:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-13 00:20:38,166 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:20:38,166 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] [2024-09-13 00:20:38,182 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 00:20:38,367 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 [2024-09-13 00:20:38,367 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:20:38,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:38,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1427018501, now seen corresponding path program 2 times [2024-09-13 00:20:38,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:20:38,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155572874] [2024-09-13 00:20:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:38,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:20:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:20:38,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052434041] [2024-09-13 00:20:38,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:20:38,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:20:38,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:20:38,401 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) [2024-09-13 00:20:38,403 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 00:20:38,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:20:38,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:20:38,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-13 00:20:38,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:20:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 00:20:38,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:20:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-13 00:20:39,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:20:39,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155572874] [2024-09-13 00:20:39,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:20:39,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052434041] [2024-09-13 00:20:39,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052434041] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:20:39,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:20:39,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2024-09-13 00:20:39,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921341466] [2024-09-13 00:20:39,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:20:39,224 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 00:20:39,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:20:39,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 00:20:39,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-09-13 00:20:39,225 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-13 00:20:41,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:20:42,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:20:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:20:42,643 INFO L93 Difference]: Finished difference Result 128 states and 166 transitions. [2024-09-13 00:20:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:20:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 55 [2024-09-13 00:20:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:20:42,645 INFO L225 Difference]: With dead ends: 128 [2024-09-13 00:20:42,645 INFO L226 Difference]: Without dead ends: 126 [2024-09-13 00:20:42,646 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2024-09-13 00:20:42,646 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:20:42,647 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 252 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-09-13 00:20:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-09-13 00:20:42,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2024-09-13 00:20:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 53 states have (on average 1.150943396226415) internal successors, (61), 56 states have internal predecessors, (61), 27 states have call successors, (27), 14 states have call predecessors, (27), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-13 00:20:42,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2024-09-13 00:20:42,671 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 55 [2024-09-13 00:20:42,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:20:42,671 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2024-09-13 00:20:42,671 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-13 00:20:42,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:42,672 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2024-09-13 00:20:42,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 00:20:42,673 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:20:42,673 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] [2024-09-13 00:20:42,687 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 00:20:42,876 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 [2024-09-13 00:20:42,877 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:20:42,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:42,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1563984878, now seen corresponding path program 1 times [2024-09-13 00:20:42,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:20:42,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609266997] [2024-09-13 00:20:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:42,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:20:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:20:42,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630156413] [2024-09-13 00:20:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:42,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:20:42,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:20:42,895 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) [2024-09-13 00:20:42,896 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 00:20:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:42,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 00:20:42,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:20:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-13 00:20:43,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:20:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-13 00:20:43,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:20:43,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609266997] [2024-09-13 00:20:43,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:20:43,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630156413] [2024-09-13 00:20:43,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630156413] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:20:43,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:20:43,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2024-09-13 00:20:43,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626702086] [2024-09-13 00:20:43,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:20:43,390 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 00:20:43,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:20:43,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 00:20:43,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-09-13 00:20:43,392 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2024-09-13 00:20:44,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:20:44,048 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2024-09-13 00:20:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 00:20:44,049 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 60 [2024-09-13 00:20:44,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:20:44,050 INFO L225 Difference]: With dead ends: 119 [2024-09-13 00:20:44,050 INFO L226 Difference]: Without dead ends: 101 [2024-09-13 00:20:44,051 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-09-13 00:20:44,051 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 00:20:44,052 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 255 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 00:20:44,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-13 00:20:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2024-09-13 00:20:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-13 00:20:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2024-09-13 00:20:44,075 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 60 [2024-09-13 00:20:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:20:44,075 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2024-09-13 00:20:44,076 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2024-09-13 00:20:44,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2024-09-13 00:20:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-13 00:20:44,077 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:20:44,077 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:20:44,096 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 00:20:44,278 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 [2024-09-13 00:20:44,278 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:20:44,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:44,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1657370914, now seen corresponding path program 1 times [2024-09-13 00:20:44,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:20:44,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684445977] [2024-09-13 00:20:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:44,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:20:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:20:44,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249826767] [2024-09-13 00:20:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:44,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:20:44,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:20:44,296 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:20:44,302 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 00:20:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:44,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-13 00:20:44,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:20:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 00:20:44,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:20:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-13 00:20:44,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:20:44,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684445977] [2024-09-13 00:20:44,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:20:44,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249826767] [2024-09-13 00:20:44,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249826767] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 00:20:44,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:20:44,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2024-09-13 00:20:44,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487817195] [2024-09-13 00:20:44,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:20:44,572 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:20:44,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:20:44,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:20:44,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-13 00:20:44,573 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (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) [2024-09-13 00:20:44,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:20:44,710 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2024-09-13 00:20:44,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:20:44,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (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 68 [2024-09-13 00:20:44,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:20:44,712 INFO L225 Difference]: With dead ends: 92 [2024-09-13 00:20:44,712 INFO L226 Difference]: Without dead ends: 87 [2024-09-13 00:20:44,712 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-09-13 00:20:44,713 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:20:44,713 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:20:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-13 00:20:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2024-09-13 00:20:44,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 20 states have call successors, (20), 14 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 00:20:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2024-09-13 00:20:44,748 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 68 [2024-09-13 00:20:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:20:44,748 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2024-09-13 00:20:44,748 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (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) [2024-09-13 00:20:44,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2024-09-13 00:20:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 00:20:44,751 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:20:44,751 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:20:44,770 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 00:20:44,955 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:20:44,956 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:20:44,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:44,958 INFO L85 PathProgramCache]: Analyzing trace with hash -335668690, now seen corresponding path program 1 times [2024-09-13 00:20:44,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:20:44,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007748293] [2024-09-13 00:20:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:44,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:20:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:45,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:20:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:45,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:20:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:45,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:20:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:45,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:20:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:45,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:20:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:45,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 00:20:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:45,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-13 00:20:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:45,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 00:20:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:45,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-13 00:20:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:45,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-13 00:20:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:45,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-13 00:20:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:45,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-13 00:20:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-13 00:20:45,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:20:45,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007748293] [2024-09-13 00:20:45,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007748293] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:20:45,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544874385] [2024-09-13 00:20:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:20:45,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:20:45,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:20:45,182 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:20:45,184 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 00:20:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:20:45,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 00:20:45,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:20:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-13 00:20:45,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:20:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-13 00:20:45,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544874385] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:20:45,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:20:45,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2024-09-13 00:20:45,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501235175] [2024-09-13 00:20:45,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:20:45,356 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 00:20:45,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:20:45,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 00:20:45,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-09-13 00:20:45,357 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-13 00:20:45,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:20:45,502 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2024-09-13 00:20:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 00:20:45,503 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 71 [2024-09-13 00:20:45,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:20:45,504 INFO L225 Difference]: With dead ends: 92 [2024-09-13 00:20:45,504 INFO L226 Difference]: Without dead ends: 0 [2024-09-13 00:20:45,507 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-09-13 00:20:45,508 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:20:45,509 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 195 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:20:45,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-13 00:20:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-13 00:20:45,509 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) [2024-09-13 00:20:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-13 00:20:45,510 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2024-09-13 00:20:45,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:20:45,510 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-13 00:20:45,510 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-13 00:20:45,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:20:45,511 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-13 00:20:45,511 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-13 00:20:45,513 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-13 00:20:45,530 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 00:20:45,714 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 00:20:45,717 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:20:45,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-13 00:20:59,016 WARN L293 SmtUtils]: Spent 13.03s on a formula simplification. DAG size of input: 71 DAG size of output: 35 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-13 00:21:08,549 WARN L293 SmtUtils]: Spent 9.46s on a formula simplification. DAG size of input: 71 DAG size of output: 35 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-13 00:21:15,429 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 00:21:15,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 12:21:15 BoogieIcfgContainer [2024-09-13 00:21:15,444 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 00:21:15,444 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-13 00:21:15,444 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-13 00:21:15,445 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-13 00:21:15,445 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:20:34" (3/4) ... [2024-09-13 00:21:15,447 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-13 00:21:15,450 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-13 00:21:15,451 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-09-13 00:21:15,451 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-13 00:21:15,451 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-13 00:21:15,454 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2024-09-13 00:21:15,454 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-09-13 00:21:15,454 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-13 00:21:15,455 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-13 00:21:15,455 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-13 00:21:15,531 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-13 00:21:15,532 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-13 00:21:15,532 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-13 00:21:15,532 INFO L158 Benchmark]: Toolchain (without parser) took 41492.76ms. Allocated memory was 155.2MB in the beginning and 226.5MB in the end (delta: 71.3MB). Free memory was 83.9MB in the beginning and 112.0MB in the end (delta: -28.1MB). Peak memory consumption was 45.3MB. Max. memory is 16.1GB. [2024-09-13 00:21:15,533 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 155.2MB. Free memory was 106.3MB in the beginning and 106.2MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 00:21:15,533 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.24ms. Allocated memory is still 155.2MB. Free memory was 83.7MB in the beginning and 72.0MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-13 00:21:15,533 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.99ms. Allocated memory is still 155.2MB. Free memory was 72.0MB in the beginning and 70.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 00:21:15,533 INFO L158 Benchmark]: Boogie Preprocessor took 33.26ms. Allocated memory is still 155.2MB. Free memory was 70.9MB in the beginning and 69.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 00:21:15,534 INFO L158 Benchmark]: RCFGBuilder took 407.12ms. Allocated memory was 155.2MB in the beginning and 226.5MB in the end (delta: 71.3MB). Free memory was 69.2MB in the beginning and 197.2MB in the end (delta: -128.0MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. [2024-09-13 00:21:15,534 INFO L158 Benchmark]: TraceAbstraction took 40718.10ms. Allocated memory is still 226.5MB. Free memory was 196.3MB in the beginning and 116.2MB in the end (delta: 80.1MB). Peak memory consumption was 132.9MB. Max. memory is 16.1GB. [2024-09-13 00:21:15,534 INFO L158 Benchmark]: Witness Printer took 87.55ms. Allocated memory is still 226.5MB. Free memory was 116.2MB in the beginning and 112.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-13 00:21:15,535 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 155.2MB. Free memory was 106.3MB in the beginning and 106.2MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.24ms. Allocated memory is still 155.2MB. Free memory was 83.7MB in the beginning and 72.0MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.99ms. Allocated memory is still 155.2MB. Free memory was 72.0MB in the beginning and 70.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.26ms. Allocated memory is still 155.2MB. Free memory was 70.9MB in the beginning and 69.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 407.12ms. Allocated memory was 155.2MB in the beginning and 226.5MB in the end (delta: 71.3MB). Free memory was 69.2MB in the beginning and 197.2MB in the end (delta: -128.0MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. * TraceAbstraction took 40718.10ms. Allocated memory is still 226.5MB. Free memory was 196.3MB in the beginning and 116.2MB in the end (delta: 80.1MB). Peak memory consumption was 132.9MB. Max. memory is 16.1GB. * Witness Printer took 87.55ms. Allocated memory is still 226.5MB. Free memory was 116.2MB in the beginning and 112.0MB in the end (delta: 4.2MB). 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: 10.9s, OverallIterations: 11, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 122 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 96 mSDsluCounter, 1681 SdHoareTripleChecker+Invalid, 4.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1310 mSDsCounter, 119 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1040 IncrementalHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 119 mSolverCounterUnsat, 371 mSDtfsCounter, 1040 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 828 GetRequests, 736 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=8, InterpolantAutomatonStates: 75, 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, 11 MinimizatonAttempts, 54 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 1016 NumberOfCodeBlocks, 1016 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 909 ConstructedInterpolants, 0 QuantifiedInterpolants, 2695 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1156 ConjunctsInSsa, 152 ConjunctsInUnsatCore, 17 InterpolantComputations, 8 PerfectInterpolantSequences, 1091/1171 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: (((((b == (((__int128) q * x) + ((__int128) y * s))) && (1 <= x)) && (a == (((__int128) y * r) + ((__int128) p * x)))) && (1 <= y)) && (((__int128) p * s) == (((__int128) q * r) + 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! [2024-09-13 00:21:15,559 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