./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 a9b967e5 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-a9b967e-m [2024-09-12 15:53:42,123 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 15:53:42,197 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 15:53:42,203 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 15:53:42,205 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 15:53:42,240 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 15:53:42,241 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 15:53:42,241 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 15:53:42,242 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 15:53:42,246 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 15:53:42,246 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 15:53:42,246 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 15:53:42,247 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 15:53:42,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 15:53:42,248 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 15:53:42,248 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 15:53:42,248 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 15:53:42,249 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 15:53:42,249 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 15:53:42,249 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 15:53:42,250 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 15:53:42,252 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 15:53:42,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 15:53:42,253 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 15:53:42,253 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 15:53:42,253 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 15:53:42,253 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 15:53:42,254 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 15:53:42,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 15:53:42,254 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 15:53:42,254 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 15:53:42,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 15:53:42,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:53:42,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 15:53:42,255 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 15:53:42,256 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 15:53:42,256 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 15:53:42,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 15:53:42,257 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 15:53:42,257 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 15:53:42,258 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 15:53:42,258 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 15:53:42,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d9847fe213bf8df5d23c53d2bc8b53fb384c85820b87c09591484702dabefc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 15:53:42,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 15:53:42,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 15:53:42,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 15:53:42,612 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 15:53:42,612 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 15:53:42,614 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c [2024-09-12 15:53:44,221 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 15:53:44,456 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 15:53:44,457 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c [2024-09-12 15:53:44,470 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e0eb5034d/4e50edb02fff41818b9c7f05194a5025/FLAG5f0c8a082 [2024-09-12 15:53:44,803 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e0eb5034d/4e50edb02fff41818b9c7f05194a5025 [2024-09-12 15:53:44,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 15:53:44,807 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 15:53:44,808 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 15:53:44,808 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 15:53:44,812 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 15:53:44,813 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:53:44" (1/1) ... [2024-09-12 15:53:44,814 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ce8303d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:44, skipping insertion in model container [2024-09-12 15:53:44,816 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:53:44" (1/1) ... [2024-09-12 15:53:44,835 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 15:53:45,023 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] [2024-09-12 15:53:45,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:53:45,072 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 15:53:45,085 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] [2024-09-12 15:53:45,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:53:45,114 INFO L204 MainTranslator]: Completed translation [2024-09-12 15:53:45,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:45 WrapperNode [2024-09-12 15:53:45,115 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 15:53:45,116 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 15:53:45,117 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 15:53:45,117 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 15:53:45,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:45" (1/1) ... [2024-09-12 15:53:45,132 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:45" (1/1) ... [2024-09-12 15:53:45,138 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 15:53:45,139 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 15:53:45,140 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 15:53:45,140 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 15:53:45,140 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 15:53:45,150 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:45" (1/1) ... [2024-09-12 15:53:45,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:45" (1/1) ... [2024-09-12 15:53:45,156 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:45" (1/1) ... [2024-09-12 15:53:45,176 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]. [2024-09-12 15:53:45,176 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:45" (1/1) ... [2024-09-12 15:53:45,176 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:45" (1/1) ... [2024-09-12 15:53:45,181 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:45" (1/1) ... [2024-09-12 15:53:45,187 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:45" (1/1) ... [2024-09-12 15:53:45,188 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:45" (1/1) ... [2024-09-12 15:53:45,190 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:45" (1/1) ... [2024-09-12 15:53:45,192 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 15:53:45,194 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 15:53:45,195 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 15:53:45,195 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 15:53:45,196 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:45" (1/1) ... [2024-09-12 15:53:45,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:53:45,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:53:45,234 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) [2024-09-12 15:53:45,240 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 [2024-09-12 15:53:45,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 15:53:45,286 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 15:53:45,287 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 15:53:45,287 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 15:53:45,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 15:53:45,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 15:53:45,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 15:53:45,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 15:53:45,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 15:53:45,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 15:53:45,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 15:53:45,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 15:53:45,362 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 15:53:45,365 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 15:53:45,561 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-12 15:53:45,561 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 15:53:45,587 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 15:53:45,587 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 15:53:45,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:53:45 BoogieIcfgContainer [2024-09-12 15:53:45,588 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 15:53:45,603 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 15:53:45,606 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 15:53:45,609 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 15:53:45,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 03:53:44" (1/3) ... [2024-09-12 15:53:45,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51178846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:53:45, skipping insertion in model container [2024-09-12 15:53:45,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:53:45" (2/3) ... [2024-09-12 15:53:45,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51178846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:53:45, skipping insertion in model container [2024-09-12 15:53:45,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:53:45" (3/3) ... [2024-09-12 15:53:45,613 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound10.c [2024-09-12 15:53:45,631 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 15:53:45,631 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 15:53:45,698 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 15:53:45,708 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;@7be9447d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 15:53:45,708 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 15:53:45,712 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) [2024-09-12 15:53:45,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 15:53:45,722 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:53:45,723 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] [2024-09-12 15:53:45,723 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:53:45,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:45,730 INFO L85 PathProgramCache]: Analyzing trace with hash 963610160, now seen corresponding path program 1 times [2024-09-12 15:53:45,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:53:45,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233806740] [2024-09-12 15:53:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:45,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:53:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:45,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:53:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:45,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:53:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:45,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:53:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:45,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:53:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:45,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:53:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:53:45,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:53:45,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233806740] [2024-09-12 15:53:45,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233806740] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:53:45,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:53:45,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 15:53:45,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816196061] [2024-09-12 15:53:45,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:53:45,972 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 15:53:45,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:53:46,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 15:53:46,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 15:53:46,011 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) [2024-09-12 15:53:46,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:53:46,054 INFO L93 Difference]: Finished difference Result 64 states and 102 transitions. [2024-09-12 15:53:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 15:53:46,057 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 [2024-09-12 15:53:46,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:53:46,065 INFO L225 Difference]: With dead ends: 64 [2024-09-12 15:53:46,066 INFO L226 Difference]: Without dead ends: 31 [2024-09-12 15:53:46,070 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 [2024-09-12 15:53:46,074 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 [2024-09-12 15:53:46,075 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] [2024-09-12 15:53:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-12 15:53:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-12 15:53:46,121 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) [2024-09-12 15:53:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-09-12 15:53:46,126 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 32 [2024-09-12 15:53:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:53:46,128 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-09-12 15:53:46,128 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) [2024-09-12 15:53:46,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:46,130 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-09-12 15:53:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 15:53:46,133 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:53:46,133 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] [2024-09-12 15:53:46,134 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 15:53:46,135 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:53:46,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:46,135 INFO L85 PathProgramCache]: Analyzing trace with hash -914175556, now seen corresponding path program 1 times [2024-09-12 15:53:46,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:53:46,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646160502] [2024-09-12 15:53:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:46,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:53:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:53:46,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315571762] [2024-09-12 15:53:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:46,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:53:46,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:53:46,176 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) [2024-09-12 15:53:46,178 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 15:53:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:46,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 15:53:46,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:53:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:53:46,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:53:46,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:53:46,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646160502] [2024-09-12 15:53:46,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:53:46,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315571762] [2024-09-12 15:53:46,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315571762] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:53:46,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:53:46,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:53:46,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264604617] [2024-09-12 15:53:46,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:53:46,401 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:53:46,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:53:46,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:53:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:53:46,404 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) [2024-09-12 15:53:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:53:46,500 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2024-09-12 15:53:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:53:46,501 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 [2024-09-12 15:53:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:53:46,502 INFO L225 Difference]: With dead ends: 47 [2024-09-12 15:53:46,503 INFO L226 Difference]: Without dead ends: 45 [2024-09-12 15:53:46,503 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 [2024-09-12 15:53:46,504 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:53:46,505 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 129 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:53:46,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-12 15:53:46,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2024-09-12 15:53:46,517 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) [2024-09-12 15:53:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2024-09-12 15:53:46,519 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 32 [2024-09-12 15:53:46,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:53:46,520 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2024-09-12 15:53:46,520 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) [2024-09-12 15:53:46,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2024-09-12 15:53:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 15:53:46,522 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:53:46,522 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] [2024-09-12 15:53:46,536 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 15:53:46,726 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 [2024-09-12 15:53:46,727 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:53:46,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:46,727 INFO L85 PathProgramCache]: Analyzing trace with hash 737940505, now seen corresponding path program 1 times [2024-09-12 15:53:46,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:53:46,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565812105] [2024-09-12 15:53:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:46,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:53:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:53:46,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165368251] [2024-09-12 15:53:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:46,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:53:46,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:53:46,755 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) [2024-09-12 15:53:46,764 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 15:53:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:46,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 15:53:46,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:53:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:53:46,913 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:53:46,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:53:46,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565812105] [2024-09-12 15:53:46,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:53:46,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165368251] [2024-09-12 15:53:46,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165368251] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:53:46,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:53:46,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:53:46,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154598049] [2024-09-12 15:53:46,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:53:46,917 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:53:46,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:53:46,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:53:46,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:53:46,920 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) [2024-09-12 15:53:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:53:47,006 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2024-09-12 15:53:47,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:53:47,007 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 [2024-09-12 15:53:47,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:53:47,008 INFO L225 Difference]: With dead ends: 51 [2024-09-12 15:53:47,008 INFO L226 Difference]: Without dead ends: 49 [2024-09-12 15:53:47,009 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 [2024-09-12 15:53:47,010 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 [2024-09-12 15:53:47,011 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] [2024-09-12 15:53:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-12 15:53:47,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-09-12 15:53:47,026 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) [2024-09-12 15:53:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2024-09-12 15:53:47,032 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 37 [2024-09-12 15:53:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:53:47,033 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2024-09-12 15:53:47,033 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) [2024-09-12 15:53:47,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2024-09-12 15:53:47,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 15:53:47,035 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:53:47,035 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] [2024-09-12 15:53:47,051 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 15:53:47,235 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 [2024-09-12 15:53:47,236 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:53:47,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:47,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1385223068, now seen corresponding path program 1 times [2024-09-12 15:53:47,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:53:47,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622546798] [2024-09-12 15:53:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:47,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:53:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:53:47,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998233615] [2024-09-12 15:53:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:47,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:53:47,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:53:47,282 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) [2024-09-12 15:53:47,284 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 15:53:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:47,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 15:53:47,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:53:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 15:53:47,416 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:53:47,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:53:47,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622546798] [2024-09-12 15:53:47,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:53:47,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998233615] [2024-09-12 15:53:47,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998233615] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:53:47,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:53:47,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:53:47,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319889839] [2024-09-12 15:53:47,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:53:47,420 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:53:47,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:53:47,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:53:47,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:53:47,422 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) [2024-09-12 15:53:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:53:47,508 INFO L93 Difference]: Finished difference Result 73 states and 104 transitions. [2024-09-12 15:53:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:53:47,509 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 [2024-09-12 15:53:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:53:47,512 INFO L225 Difference]: With dead ends: 73 [2024-09-12 15:53:47,512 INFO L226 Difference]: Without dead ends: 69 [2024-09-12 15:53:47,513 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 [2024-09-12 15:53:47,514 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 [2024-09-12 15:53:47,514 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] [2024-09-12 15:53:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-12 15:53:47,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-12 15:53:47,533 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) [2024-09-12 15:53:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2024-09-12 15:53:47,535 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 42 [2024-09-12 15:53:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:53:47,536 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2024-09-12 15:53:47,536 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) [2024-09-12 15:53:47,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2024-09-12 15:53:47,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:53:47,538 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:53:47,538 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] [2024-09-12 15:53:47,556 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 15:53:47,739 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 [2024-09-12 15:53:47,739 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:53:47,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:47,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1071635405, now seen corresponding path program 1 times [2024-09-12 15:53:47,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:53:47,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961253455] [2024-09-12 15:53:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:47,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:53:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:47,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:53:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:47,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:53:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:47,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:53:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:47,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:53:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:47,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:53:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:53:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:53:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:53:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 15:53:48,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:53:48,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961253455] [2024-09-12 15:53:48,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961253455] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:53:48,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:53:48,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:53:48,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329272959] [2024-09-12 15:53:48,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:53:48,026 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:53:48,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:53:48,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:53:48,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:53:48,027 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) [2024-09-12 15:53:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:53:48,092 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2024-09-12 15:53:48,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:53:48,093 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 [2024-09-12 15:53:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:53:48,094 INFO L225 Difference]: With dead ends: 75 [2024-09-12 15:53:48,094 INFO L226 Difference]: Without dead ends: 73 [2024-09-12 15:53:48,095 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 [2024-09-12 15:53:48,096 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 [2024-09-12 15:53:48,096 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] [2024-09-12 15:53:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-12 15:53:48,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-12 15:53:48,109 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) [2024-09-12 15:53:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2024-09-12 15:53:48,110 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 48 [2024-09-12 15:53:48,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:53:48,111 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2024-09-12 15:53:48,111 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) [2024-09-12 15:53:48,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:48,112 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2024-09-12 15:53:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 15:53:48,113 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:53:48,115 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] [2024-09-12 15:53:48,115 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-12 15:53:48,115 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:53:48,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:48,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1501538128, now seen corresponding path program 1 times [2024-09-12 15:53:48,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:53:48,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749029277] [2024-09-12 15:53:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:48,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:53:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:53:48,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808756847] [2024-09-12 15:53:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:48,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:53:48,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:53:48,136 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) [2024-09-12 15:53:48,138 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 15:53:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 15:53:48,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:53:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-12 15:53:48,304 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:53:48,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:53:48,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749029277] [2024-09-12 15:53:48,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:53:48,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808756847] [2024-09-12 15:53:48,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808756847] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:53:48,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:53:48,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:53:48,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207356968] [2024-09-12 15:53:48,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:53:48,307 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:53:48,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:53:48,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:53:48,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:53:48,308 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) [2024-09-12 15:53:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:53:48,384 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2024-09-12 15:53:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:53:48,384 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 [2024-09-12 15:53:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:53:48,386 INFO L225 Difference]: With dead ends: 83 [2024-09-12 15:53:48,386 INFO L226 Difference]: Without dead ends: 80 [2024-09-12 15:53:48,386 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 [2024-09-12 15:53:48,387 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 [2024-09-12 15:53:48,387 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] [2024-09-12 15:53:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-12 15:53:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2024-09-12 15:53:48,399 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) [2024-09-12 15:53:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-12 15:53:48,401 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 50 [2024-09-12 15:53:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:53:48,401 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-12 15:53:48,401 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) [2024-09-12 15:53:48,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-12 15:53:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-12 15:53:48,403 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:53:48,403 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] [2024-09-12 15:53:48,420 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 15:53:48,604 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 [2024-09-12 15:53:48,604 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:53:48,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:48,605 INFO L85 PathProgramCache]: Analyzing trace with hash 789508930, now seen corresponding path program 1 times [2024-09-12 15:53:48,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:53:48,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605005536] [2024-09-12 15:53:48,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:48,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:53:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:53:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:53:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:53:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:53:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:53:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:53:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:53:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:53:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 15:53:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-12 15:53:48,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:53:48,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605005536] [2024-09-12 15:53:48,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605005536] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:53:48,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135127977] [2024-09-12 15:53:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:48,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:53:48,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:53:48,998 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) [2024-09-12 15:53:49,001 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 15:53:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:49,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 15:53:49,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:53:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-12 15:53:49,182 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:53:49,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135127977] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:53:49,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:53:49,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-12 15:53:49,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506429245] [2024-09-12 15:53:49,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:53:49,185 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 15:53:49,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:53:49,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 15:53:49,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-12 15:53:49,185 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) [2024-09-12 15:53:49,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:53:49,285 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2024-09-12 15:53:49,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 15:53:49,286 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 [2024-09-12 15:53:49,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:53:49,288 INFO L225 Difference]: With dead ends: 91 [2024-09-12 15:53:49,288 INFO L226 Difference]: Without dead ends: 87 [2024-09-12 15:53:49,289 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 [2024-09-12 15:53:49,291 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 [2024-09-12 15:53:49,292 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] [2024-09-12 15:53:49,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-12 15:53:49,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-09-12 15:53:49,311 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) [2024-09-12 15:53:49,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2024-09-12 15:53:49,314 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 53 [2024-09-12 15:53:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:53:49,314 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2024-09-12 15:53:49,314 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) [2024-09-12 15:53:49,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2024-09-12 15:53:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-12 15:53:49,316 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:53:49,316 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] [2024-09-12 15:53:49,332 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 15:53:49,516 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 [2024-09-12 15:53:49,517 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:53:49,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:49,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1427018501, now seen corresponding path program 2 times [2024-09-12 15:53:49,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:53:49,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178519604] [2024-09-12 15:53:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:49,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:53:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:53:49,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122317224] [2024-09-12 15:53:49,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:53:49,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:53:49,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:53:49,543 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) [2024-09-12 15:53:49,545 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 15:53:49,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:53:49,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:53:49,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-12 15:53:49,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:53:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:53:49,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:53:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-12 15:53:50,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:53:50,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178519604] [2024-09-12 15:53:50,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:53:50,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122317224] [2024-09-12 15:53:50,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122317224] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:53:50,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:53:50,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2024-09-12 15:53:50,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596857275] [2024-09-12 15:53:50,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:53:50,469 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 15:53:50,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:53:50,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 15:53:50,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-09-12 15:53:50,471 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) [2024-09-12 15:53:52,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:53:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:53:53,391 INFO L93 Difference]: Finished difference Result 128 states and 166 transitions. [2024-09-12 15:53:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 15:53:53,392 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 [2024-09-12 15:53:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:53:53,394 INFO L225 Difference]: With dead ends: 128 [2024-09-12 15:53:53,394 INFO L226 Difference]: Without dead ends: 126 [2024-09-12 15:53:53,394 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 [2024-09-12 15:53:53,396 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s 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, 2.6s IncrementalHoareTripleChecker+Time [2024-09-12 15:53:53,397 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 252 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-09-12 15:53:53,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-09-12 15:53:53,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2024-09-12 15:53:53,440 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) [2024-09-12 15:53:53,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2024-09-12 15:53:53,442 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 55 [2024-09-12 15:53:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:53:53,444 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2024-09-12 15:53:53,444 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) [2024-09-12 15:53:53,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2024-09-12 15:53:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 15:53:53,445 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:53:53,445 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] [2024-09-12 15:53:53,465 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 15:53:53,646 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 [2024-09-12 15:53:53,646 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:53:53,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:53,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1563984878, now seen corresponding path program 1 times [2024-09-12 15:53:53,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:53:53,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353297133] [2024-09-12 15:53:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:53,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:53:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:53:53,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539457203] [2024-09-12 15:53:53,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:53,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:53:53,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:53:53,672 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) [2024-09-12 15:53:53,674 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 15:53:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:53,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-12 15:53:53,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:53:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:53:54,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:53:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-12 15:53:54,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:53:54,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353297133] [2024-09-12 15:53:54,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:53:54,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539457203] [2024-09-12 15:53:54,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539457203] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:53:54,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:53:54,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2024-09-12 15:53:54,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927805224] [2024-09-12 15:53:54,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:53:54,288 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 15:53:54,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:53:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 15:53:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-09-12 15:53:54,290 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) [2024-09-12 15:53:54,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:53:54,971 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2024-09-12 15:53:54,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 15:53:54,972 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 [2024-09-12 15:53:54,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:53:54,974 INFO L225 Difference]: With dead ends: 119 [2024-09-12 15:53:54,976 INFO L226 Difference]: Without dead ends: 101 [2024-09-12 15:53:54,976 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 [2024-09-12 15:53:54,977 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 [2024-09-12 15:53:54,977 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] [2024-09-12 15:53:54,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-12 15:53:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2024-09-12 15:53:55,007 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) [2024-09-12 15:53:55,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2024-09-12 15:53:55,008 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 60 [2024-09-12 15:53:55,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:53:55,008 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2024-09-12 15:53:55,008 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) [2024-09-12 15:53:55,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:55,009 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2024-09-12 15:53:55,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-12 15:53:55,010 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:53:55,010 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] [2024-09-12 15:53:55,027 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 15:53:55,214 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 [2024-09-12 15:53:55,215 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:53:55,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:55,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1657370914, now seen corresponding path program 1 times [2024-09-12 15:53:55,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:53:55,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834688189] [2024-09-12 15:53:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:55,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:53:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:53:55,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193600634] [2024-09-12 15:53:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:55,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:53:55,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:53:55,241 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) [2024-09-12 15:53:55,243 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 15:53:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:55,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-12 15:53:55,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:53:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:53:55,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:53:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-12 15:53:55,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:53:55,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834688189] [2024-09-12 15:53:55,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:53:55,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193600634] [2024-09-12 15:53:55,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193600634] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 15:53:55,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:53:55,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2024-09-12 15:53:55,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087143757] [2024-09-12 15:53:55,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:53:55,559 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:53:55,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:53:55,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:53:55,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-12 15:53:55,560 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) [2024-09-12 15:53:55,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:53:55,693 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2024-09-12 15:53:55,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:53:55,694 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 [2024-09-12 15:53:55,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:53:55,695 INFO L225 Difference]: With dead ends: 92 [2024-09-12 15:53:55,695 INFO L226 Difference]: Without dead ends: 87 [2024-09-12 15:53:55,696 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 [2024-09-12 15:53:55,696 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 [2024-09-12 15:53:55,696 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] [2024-09-12 15:53:55,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-12 15:53:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2024-09-12 15:53:55,718 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) [2024-09-12 15:53:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2024-09-12 15:53:55,719 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 68 [2024-09-12 15:53:55,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:53:55,720 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2024-09-12 15:53:55,720 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) [2024-09-12 15:53:55,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:55,721 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2024-09-12 15:53:55,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-12 15:53:55,721 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:53:55,722 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] [2024-09-12 15:53:55,738 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 15:53:55,925 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 [2024-09-12 15:53:55,926 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:53:55,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:55,926 INFO L85 PathProgramCache]: Analyzing trace with hash -335668690, now seen corresponding path program 1 times [2024-09-12 15:53:55,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:53:55,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972040131] [2024-09-12 15:53:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:55,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:53:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:56,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:53:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:56,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:53:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:56,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:53:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:56,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:53:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:56,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:53:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:56,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:53:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:56,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:53:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:56,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:53:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:56,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:53:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:56,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:53:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:56,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 15:53:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:56,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:53:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-12 15:53:56,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:53:56,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972040131] [2024-09-12 15:53:56,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972040131] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:53:56,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132880787] [2024-09-12 15:53:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:53:56,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:53:56,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:53:56,204 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) [2024-09-12 15:53:56,208 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 15:53:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:53:56,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 15:53:56,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:53:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-12 15:53:56,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:53:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-12 15:53:56,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132880787] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:53:56,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:53:56,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2024-09-12 15:53:56,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602432004] [2024-09-12 15:53:56,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:53:56,427 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 15:53:56,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:53:56,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 15:53:56,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-09-12 15:53:56,428 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) [2024-09-12 15:53:56,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:53:56,566 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2024-09-12 15:53:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 15:53:56,567 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 [2024-09-12 15:53:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:53:56,567 INFO L225 Difference]: With dead ends: 92 [2024-09-12 15:53:56,567 INFO L226 Difference]: Without dead ends: 0 [2024-09-12 15:53:56,568 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 [2024-09-12 15:53:56,569 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 [2024-09-12 15:53:56,570 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] [2024-09-12 15:53:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-12 15:53:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-12 15:53:56,571 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) [2024-09-12 15:53:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-12 15:53:56,571 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2024-09-12 15:53:56,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:53:56,571 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-12 15:53:56,571 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) [2024-09-12 15:53:56,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:53:56,572 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-12 15:53:56,572 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-12 15:53:56,575 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-12 15:53:56,592 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-12 15:53:56,775 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 [2024-09-12 15:53:56,779 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:53:56,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-12 15:54:05,052 WARN L293 SmtUtils]: Spent 7.98s 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) [2024-09-12 15:54:10,317 WARN L293 SmtUtils]: Spent 5.18s 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) [2024-09-12 15:54:19,034 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 67 DAG size of output: 35 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-12 15:54:24,720 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-12 15:54:24,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.09 03:54:24 BoogieIcfgContainer [2024-09-12 15:54:24,746 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-12 15:54:24,746 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-12 15:54:24,746 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-12 15:54:24,747 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-12 15:54:24,747 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:53:45" (3/4) ... [2024-09-12 15:54:24,749 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-12 15:54:24,752 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-12 15:54:24,753 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-09-12 15:54:24,753 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-12 15:54:24,753 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-12 15:54:24,757 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2024-09-12 15:54:24,759 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-09-12 15:54:24,759 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-12 15:54:24,759 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-12 15:54:24,759 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-12 15:54:24,861 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-12 15:54:24,862 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-12 15:54:24,862 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-12 15:54:24,863 INFO L158 Benchmark]: Toolchain (without parser) took 40056.01ms. Allocated memory was 54.5MB in the beginning and 104.9MB in the end (delta: 50.3MB). Free memory was 30.6MB in the beginning and 41.7MB in the end (delta: -11.1MB). Peak memory consumption was 39.5MB. Max. memory is 16.1GB. [2024-09-12 15:54:24,863 INFO L158 Benchmark]: CDTParser took 1.78ms. Allocated memory is still 39.8MB. Free memory is still 21.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 15:54:24,863 INFO L158 Benchmark]: CACSL2BoogieTranslator took 308.07ms. Allocated memory was 54.5MB in the beginning and 71.3MB in the end (delta: 16.8MB). Free memory was 30.4MB in the beginning and 47.2MB in the end (delta: -16.8MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2024-09-12 15:54:24,863 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.70ms. Allocated memory is still 71.3MB. Free memory was 47.2MB in the beginning and 46.4MB in the end (delta: 861.2kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 15:54:24,863 INFO L158 Benchmark]: Boogie Preprocessor took 53.70ms. Allocated memory is still 71.3MB. Free memory was 46.4MB in the beginning and 44.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-12 15:54:24,864 INFO L158 Benchmark]: RCFGBuilder took 394.08ms. Allocated memory is still 71.3MB. Free memory was 44.5MB in the beginning and 31.4MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-12 15:54:24,864 INFO L158 Benchmark]: TraceAbstraction took 39142.25ms. Allocated memory was 71.3MB in the beginning and 104.9MB in the end (delta: 33.6MB). Free memory was 49.9MB in the beginning and 46.9MB in the end (delta: 3.0MB). Peak memory consumption was 63.1MB. Max. memory is 16.1GB. [2024-09-12 15:54:24,864 INFO L158 Benchmark]: Witness Printer took 115.69ms. Allocated memory is still 104.9MB. Free memory was 46.9MB in the beginning and 41.7MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-09-12 15:54:24,866 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.78ms. Allocated memory is still 39.8MB. Free memory is still 21.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 308.07ms. Allocated memory was 54.5MB in the beginning and 71.3MB in the end (delta: 16.8MB). Free memory was 30.4MB in the beginning and 47.2MB in the end (delta: -16.8MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.70ms. Allocated memory is still 71.3MB. Free memory was 47.2MB in the beginning and 46.4MB in the end (delta: 861.2kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 53.70ms. Allocated memory is still 71.3MB. Free memory was 46.4MB in the beginning and 44.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 394.08ms. Allocated memory is still 71.3MB. Free memory was 44.5MB in the beginning and 31.4MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 39142.25ms. Allocated memory was 71.3MB in the beginning and 104.9MB in the end (delta: 33.6MB). Free memory was 49.9MB in the beginning and 46.9MB in the end (delta: 3.0MB). Peak memory consumption was 63.1MB. Max. memory is 16.1GB. * Witness Printer took 115.69ms. Allocated memory is still 104.9MB. Free memory was 46.9MB in the beginning and 41.7MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. 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: 11.1s, OverallIterations: 11, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 122 SdHoareTripleChecker+Valid, 3.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 96 mSDsluCounter, 1681 SdHoareTripleChecker+Invalid, 3.5s 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, 1.2s 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, 3.4s 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! [2024-09-12 15:54:24,893 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE