./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i -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 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-24 23:30:55,654 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:30:55,704 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:30:55,707 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:30:55,708 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:30:55,728 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:30:55,729 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:30:55,729 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:30:55,729 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:30:55,730 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:30:55,731 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:30:55,731 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:30:55,732 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:30:55,734 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:30:55,734 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:30:55,734 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:30:55,735 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:30:55,735 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:30:55,735 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:30:55,735 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:30:55,735 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:30:55,736 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:30:55,736 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:30:55,736 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:30:55,736 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:30:55,737 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:30:55,737 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:30:55,737 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:30:55,738 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:30:55,738 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:30:55,738 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:30:55,738 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:30:55,738 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:30:55,739 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:30:55,739 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:30:55,739 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:30:55,740 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:30:55,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:30:55,740 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:30:55,741 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:30:55,741 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:30:55,741 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:30:55,741 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:30:55,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:30:55,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:30:55,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:30:55,983 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:30:55,984 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:30:55,984 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2024-09-24 23:30:57,286 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:30:57,440 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:30:57,440 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2024-09-24 23:30:57,446 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/3d61321b1/bfe92164d8f249278fa1530fac81d464/FLAG3d5aab4d5 [2024-09-24 23:30:57,859 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/3d61321b1/bfe92164d8f249278fa1530fac81d464 [2024-09-24 23:30:57,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:30:57,863 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:30:57,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:30:57,866 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:30:57,871 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:30:57,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:30:57" (1/1) ... [2024-09-24 23:30:57,874 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71429ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:57, skipping insertion in model container [2024-09-24 23:30:57,874 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:30:57" (1/1) ... [2024-09-24 23:30:57,889 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:30:58,060 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2024-09-24 23:30:58,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:30:58,097 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:30:58,105 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2024-09-24 23:30:58,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:30:58,123 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:30:58,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:58 WrapperNode [2024-09-24 23:30:58,124 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:30:58,124 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:30:58,125 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:30:58,125 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:30:58,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:58" (1/1) ... [2024-09-24 23:30:58,135 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:58" (1/1) ... [2024-09-24 23:30:58,139 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:30:58,140 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:30:58,140 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:30:58,141 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:30:58,141 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:30:58,151 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:58" (1/1) ... [2024-09-24 23:30:58,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:58" (1/1) ... [2024-09-24 23:30:58,156 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:58" (1/1) ... [2024-09-24 23:30:58,172 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]. [2024-09-24 23:30:58,173 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:58" (1/1) ... [2024-09-24 23:30:58,173 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:58" (1/1) ... [2024-09-24 23:30:58,175 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:58" (1/1) ... [2024-09-24 23:30:58,178 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:58" (1/1) ... [2024-09-24 23:30:58,178 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:58" (1/1) ... [2024-09-24 23:30:58,179 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:58" (1/1) ... [2024-09-24 23:30:58,180 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:30:58,181 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:30:58,181 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:30:58,181 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:30:58,182 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:58" (1/1) ... [2024-09-24 23:30:58,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:30:58,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:58,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-24 23:30:58,214 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-24 23:30:58,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:30:58,255 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-24 23:30:58,255 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-24 23:30:58,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:30:58,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:30:58,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:30:58,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:30:58,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:30:58,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:30:58,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:30:58,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:30:58,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:30:58,305 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:30:58,307 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:30:58,448 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-24 23:30:58,448 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:30:58,470 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:30:58,471 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-24 23:30:58,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:30:58 BoogieIcfgContainer [2024-09-24 23:30:58,471 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:30:58,472 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:30:58,472 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:30:58,476 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:30:58,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:30:57" (1/3) ... [2024-09-24 23:30:58,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39782a96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:30:58, skipping insertion in model container [2024-09-24 23:30:58,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:58" (2/3) ... [2024-09-24 23:30:58,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39782a96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:30:58, skipping insertion in model container [2024-09-24 23:30:58,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:30:58" (3/3) ... [2024-09-24 23:30:58,479 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound2.i [2024-09-24 23:30:58,491 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:30:58,492 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:30:58,540 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:30:58,545 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;@1d25fd4f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:30:58,546 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:30:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-24 23:30:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-24 23:30:58,556 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:58,556 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, 1] [2024-09-24 23:30:58,557 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:58,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:58,561 INFO L85 PathProgramCache]: Analyzing trace with hash -923394275, now seen corresponding path program 1 times [2024-09-24 23:30:58,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:58,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202311083] [2024-09-24 23:30:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:58,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:58,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:30:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:58,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:30:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:58,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:30:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:58,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:30:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:58,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:30:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:30:58,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:58,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202311083] [2024-09-24 23:30:58,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202311083] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:30:58,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:30:58,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-24 23:30:58,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124364649] [2024-09-24 23:30:58,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:30:58,743 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-24 23:30:58,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:58,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-24 23:30:58,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:30:58,762 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-09-24 23:30:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:58,786 INFO L93 Difference]: Finished difference Result 58 states and 87 transitions. [2024-09-24 23:30:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-24 23:30:58,789 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 33 [2024-09-24 23:30:58,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:58,794 INFO L225 Difference]: With dead ends: 58 [2024-09-24 23:30:58,794 INFO L226 Difference]: Without dead ends: 28 [2024-09-24 23:30:58,796 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 [2024-09-24 23:30:58,799 INFO L434 NwaCegarLoop]: 36 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, 36 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:58,799 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:30:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-24 23:30:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-09-24 23:30:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-24 23:30:58,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-09-24 23:30:58,826 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 33 [2024-09-24 23:30:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:58,827 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-09-24 23:30:58,827 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-09-24 23:30:58,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:58,828 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-09-24 23:30:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-24 23:30:58,829 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:58,829 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, 1, 1] [2024-09-24 23:30:58,829 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:30:58,830 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:58,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:58,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1193042891, now seen corresponding path program 1 times [2024-09-24 23:30:58,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:58,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951683274] [2024-09-24 23:30:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:58,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:30:58,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401472429] [2024-09-24 23:30:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:58,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:58,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:58,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:30:58,878 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:30:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:58,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-24 23:30:58,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:30:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:30:59,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:30:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:30:59,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:59,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951683274] [2024-09-24 23:30:59,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:30:59,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401472429] [2024-09-24 23:30:59,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401472429] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-24 23:30:59,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:30:59,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2024-09-24 23:30:59,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842645610] [2024-09-24 23:30:59,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:30:59,270 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:30:59,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:59,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:30:59,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-24 23:30:59,271 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (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) [2024-09-24 23:31:03,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-09-24 23:31:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:31:03,404 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2024-09-24 23:31:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:31:03,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (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 34 [2024-09-24 23:31:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:31:03,406 INFO L225 Difference]: With dead ends: 38 [2024-09-24 23:31:03,406 INFO L226 Difference]: Without dead ends: 35 [2024-09-24 23:31:03,406 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:31:03,407 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:31:03,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2024-09-24 23:31:03,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-24 23:31:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-24 23:31:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-24 23:31:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-09-24 23:31:03,415 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 34 [2024-09-24 23:31:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:31:03,416 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-09-24 23:31:03,416 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (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) [2024-09-24 23:31:03,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:31:03,416 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-09-24 23:31:03,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-24 23:31:03,417 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:31:03,417 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2024-09-24 23:31:03,430 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 23:31:03,618 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 [2024-09-24 23:31:03,619 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:31:03,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:31:03,619 INFO L85 PathProgramCache]: Analyzing trace with hash 513117096, now seen corresponding path program 1 times [2024-09-24 23:31:03,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:31:03,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946064654] [2024-09-24 23:31:03,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:31:03,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:31:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:04,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:31:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:04,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:31:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:04,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:31:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:04,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:31:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:04,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:31:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:04,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-24 23:31:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:31:04,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:31:04,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946064654] [2024-09-24 23:31:04,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946064654] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:31:04,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:31:04,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-24 23:31:04,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283789129] [2024-09-24 23:31:04,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:31:04,128 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-24 23:31:04,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:31:04,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-24 23:31:04,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-24 23:31:04,130 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 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) [2024-09-24 23:31:04,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:31:04,174 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2024-09-24 23:31:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 23:31:04,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 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 42 [2024-09-24 23:31:04,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:31:04,175 INFO L225 Difference]: With dead ends: 51 [2024-09-24 23:31:04,177 INFO L226 Difference]: Without dead ends: 37 [2024-09-24 23:31:04,177 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-24 23:31:04,178 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:31:04,178 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:31:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-24 23:31:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-24 23:31:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-24 23:31:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-09-24 23:31:04,191 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 42 [2024-09-24 23:31:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:31:04,192 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-09-24 23:31:04,193 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 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) [2024-09-24 23:31:04,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:31:04,193 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-09-24 23:31:04,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-24 23:31:04,194 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:31:04,195 INFO L216 NwaCegarLoop]: trace histogram [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, 1, 1] [2024-09-24 23:31:04,195 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-24 23:31:04,195 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:31:04,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:31:04,195 INFO L85 PathProgramCache]: Analyzing trace with hash 980542403, now seen corresponding path program 1 times [2024-09-24 23:31:04,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:31:04,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194485078] [2024-09-24 23:31:04,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:31:04,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:31:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:31:04,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387089161] [2024-09-24 23:31:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:31:04,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:31:04,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:31:04,239 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:31:04,240 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:31:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:04,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-24 23:31:04,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:31:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-24 23:31:04,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:31:42,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:31:42,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194485078] [2024-09-24 23:31:42,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:31:42,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387089161] [2024-09-24 23:31:42,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387089161] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:31:42,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:31:42,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-24 23:31:42,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118021394] [2024-09-24 23:31:42,206 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:31:42,206 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-24 23:31:42,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:31:42,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-24 23:31:42,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=189, Unknown=8, NotChecked=0, Total=240 [2024-09-24 23:31:42,208 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-24 23:31:42,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:31:42,381 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2024-09-24 23:31:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-24 23:31:42,381 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 44 [2024-09-24 23:31:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:31:42,382 INFO L225 Difference]: With dead ends: 52 [2024-09-24 23:31:42,384 INFO L226 Difference]: Without dead ends: 48 [2024-09-24 23:31:42,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=49, Invalid=215, Unknown=8, NotChecked=0, Total=272 [2024-09-24 23:31:42,385 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:31:42,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 159 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:31:42,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-24 23:31:42,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2024-09-24 23:31:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-24 23:31:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-09-24 23:31:42,399 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 44 [2024-09-24 23:31:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:31:42,400 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-09-24 23:31:42,401 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-24 23:31:42,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:31:42,401 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-09-24 23:31:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-24 23:31:42,402 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:31:42,402 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:31:42,411 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-24 23:31:42,604 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:31:42,605 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:31:42,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:31:42,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2109238368, now seen corresponding path program 2 times [2024-09-24 23:31:42,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:31:42,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781543233] [2024-09-24 23:31:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:31:42,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:31:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:43,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:31:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:43,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:31:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:43,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:31:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:43,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:31:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:43,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:31:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:43,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-24 23:31:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:43,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-24 23:31:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-24 23:31:43,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:31:43,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781543233] [2024-09-24 23:31:43,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781543233] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:31:43,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613229872] [2024-09-24 23:31:43,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:31:43,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:31:43,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:31:43,065 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:31:43,066 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:31:43,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:31:43,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:31:43,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-24 23:31:43,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:31:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-24 23:31:43,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:31:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-24 23:31:44,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613229872] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:31:44,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:31:44,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 10] total 23 [2024-09-24 23:31:44,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591847730] [2024-09-24 23:31:44,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:31:44,340 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-24 23:31:44,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:31:44,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-24 23:31:44,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2024-09-24 23:31:44,341 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 10 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2024-09-24 23:31:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:31:45,247 INFO L93 Difference]: Finished difference Result 103 states and 129 transitions. [2024-09-24 23:31:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-24 23:31:45,248 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 10 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) Word has length 52 [2024-09-24 23:31:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:31:45,250 INFO L225 Difference]: With dead ends: 103 [2024-09-24 23:31:45,250 INFO L226 Difference]: Without dead ends: 68 [2024-09-24 23:31:45,251 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2024-09-24 23:31:45,252 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:31:45,252 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 261 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:31:45,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-24 23:31:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2024-09-24 23:31:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 41 states have internal predecessors, (46), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-24 23:31:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2024-09-24 23:31:45,274 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 52 [2024-09-24 23:31:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:31:45,274 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2024-09-24 23:31:45,274 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 10 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2024-09-24 23:31:45,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:31:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2024-09-24 23:31:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-24 23:31:45,277 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:31:45,277 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:31:45,292 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 23:31:45,477 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:31:45,478 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:31:45,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:31:45,478 INFO L85 PathProgramCache]: Analyzing trace with hash -860568069, now seen corresponding path program 3 times [2024-09-24 23:31:45,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:31:45,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945838055] [2024-09-24 23:31:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:31:45,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:31:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:54,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:31:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:54,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:31:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:54,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:31:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:54,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:31:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:54,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:31:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:54,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-24 23:31:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:54,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-24 23:31:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:31:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-24 23:31:54,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:31:54,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945838055] [2024-09-24 23:31:54,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945838055] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:31:54,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106173154] [2024-09-24 23:31:54,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:31:54,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:31:54,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:31:54,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:31:54,669 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:31:54,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-24 23:31:54,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:31:54,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-24 23:31:54,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:31:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-24 23:31:58,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:32:47,805 WARN L293 SmtUtils]: Spent 22.93s on a formula simplification. DAG size of input: 155 DAG size of output: 155 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:33:26,006 WARN L293 SmtUtils]: Spent 7.82s on a formula simplification that was a NOOP. DAG size: 159 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:34:06,190 WARN L293 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:34:23,179 WARN L293 SmtUtils]: Spent 7.42s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:34:55,078 WARN L293 SmtUtils]: Spent 6.50s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)