./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 ea97fe631de3abcfa1030cdb800e2845e2e97a42347e391a7c9fd401d3d0b815 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 20:02:27,655 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 20:02:27,725 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 20:02:27,730 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 20:02:27,733 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 20:02:27,762 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 20:02:27,763 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 20:02:27,763 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 20:02:27,764 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 20:02:27,766 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 20:02:27,766 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 20:02:27,766 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 20:02:27,767 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 20:02:27,767 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 20:02:27,768 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 20:02:27,768 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 20:02:27,769 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 20:02:27,769 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 20:02:27,769 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 20:02:27,770 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 20:02:27,770 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 20:02:27,770 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 20:02:27,771 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 20:02:27,771 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 20:02:27,771 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 20:02:27,772 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 20:02:27,772 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 20:02:27,772 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 20:02:27,773 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 20:02:27,773 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 20:02:27,773 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 20:02:27,773 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 20:02:27,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:02:27,774 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 20:02:27,774 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 20:02:27,775 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 20:02:27,775 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 20:02:27,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 20:02:27,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 20:02:27,776 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 20:02:27,776 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 20:02:27,778 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 20:02:27,778 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/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea97fe631de3abcfa1030cdb800e2845e2e97a42347e391a7c9fd401d3d0b815 [2024-11-11 20:02:28,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 20:02:28,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 20:02:28,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 20:02:28,060 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 20:02:28,060 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 20:02:28,061 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i [2024-11-11 20:02:29,564 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 20:02:29,749 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 20:02:29,750 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i [2024-11-11 20:02:29,759 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd9515303/a7d0ba5ab5ce4171b64a4de60a94f336/FLAG1f01f888e [2024-11-11 20:02:30,119 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd9515303/a7d0ba5ab5ce4171b64a4de60a94f336 [2024-11-11 20:02:30,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 20:02:30,123 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 20:02:30,124 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 20:02:30,124 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 20:02:30,129 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 20:02:30,130 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:02:30" (1/1) ... [2024-11-11 20:02:30,131 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c49588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30, skipping insertion in model container [2024-11-11 20:02:30,131 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:02:30" (1/1) ... [2024-11-11 20:02:30,152 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 20:02:30,324 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i[950,963] [2024-11-11 20:02:30,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:02:30,354 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 20:02:30,367 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i[950,963] [2024-11-11 20:02:30,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:02:30,393 INFO L204 MainTranslator]: Completed translation [2024-11-11 20:02:30,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30 WrapperNode [2024-11-11 20:02:30,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 20:02:30,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 20:02:30,396 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 20:02:30,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 20:02:30,402 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30" (1/1) ... [2024-11-11 20:02:30,409 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30" (1/1) ... [2024-11-11 20:02:30,425 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 48 [2024-11-11 20:02:30,425 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 20:02:30,426 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 20:02:30,426 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 20:02:30,426 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 20:02:30,433 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30" (1/1) ... [2024-11-11 20:02:30,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30" (1/1) ... [2024-11-11 20:02:30,434 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30" (1/1) ... [2024-11-11 20:02:30,448 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]. [2024-11-11 20:02:30,448 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30" (1/1) ... [2024-11-11 20:02:30,448 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30" (1/1) ... [2024-11-11 20:02:30,451 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30" (1/1) ... [2024-11-11 20:02:30,454 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30" (1/1) ... [2024-11-11 20:02:30,455 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30" (1/1) ... [2024-11-11 20:02:30,456 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30" (1/1) ... [2024-11-11 20:02:30,457 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 20:02:30,458 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 20:02:30,458 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 20:02:30,458 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 20:02:30,459 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30" (1/1) ... [2024-11-11 20:02:30,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:02:30,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:02:30,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-11 20:02:30,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-11 20:02:30,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 20:02:30,593 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-11 20:02:30,593 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-11 20:02:30,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 20:02:30,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 20:02:30,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 20:02:30,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-11 20:02:30,595 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-11 20:02:30,665 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 20:02:30,670 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 20:02:30,823 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-11 20:02:30,824 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 20:02:30,839 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 20:02:30,839 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-11 20:02:30,840 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:02:30 BoogieIcfgContainer [2024-11-11 20:02:30,840 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 20:02:30,842 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 20:02:30,842 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 20:02:30,845 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 20:02:30,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 08:02:30" (1/3) ... [2024-11-11 20:02:30,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebd6552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:02:30, skipping insertion in model container [2024-11-11 20:02:30,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:02:30" (2/3) ... [2024-11-11 20:02:30,847 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebd6552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:02:30, skipping insertion in model container [2024-11-11 20:02:30,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:02:30" (3/3) ... [2024-11-11 20:02:30,848 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound1.i [2024-11-11 20:02:30,860 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 20:02:30,860 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 20:02:30,911 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 20:02:30,918 INFO L333 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=LoopHeads, 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;@7c6ca1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 20:02:30,918 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 20:02:30,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-11 20:02:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-11 20:02:30,929 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:02:30,930 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:02:30,930 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:02:30,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:02:30,936 INFO L85 PathProgramCache]: Analyzing trace with hash 913242413, now seen corresponding path program 1 times [2024-11-11 20:02:30,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:02:30,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252139775] [2024-11-11 20:02:30,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:02:30,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:02:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:02:31,086 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:02:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:02:31,099 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 20:02:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:02:31,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:02:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:02:31,115 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:02:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:02:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 20:02:31,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:02:31,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252139775] [2024-11-11 20:02:31,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252139775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:02:31,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:02:31,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-11 20:02:31,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652217735] [2024-11-11 20:02:31,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:02:31,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-11 20:02:31,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:02:31,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-11 20:02:31,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 20:02:31,157 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-11 20:02:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:02:31,175 INFO L93 Difference]: Finished difference Result 55 states and 84 transitions. [2024-11-11 20:02:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-11 20:02:31,177 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-11-11 20:02:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:02:31,184 INFO L225 Difference]: With dead ends: 55 [2024-11-11 20:02:31,185 INFO L226 Difference]: Without dead ends: 25 [2024-11-11 20:02:31,188 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 20:02:31,192 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:02:31,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:02:31,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-11 20:02:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-11 20:02:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-11 20:02:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-11-11 20:02:31,221 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 30 [2024-11-11 20:02:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:02:31,221 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-11-11 20:02:31,222 INFO L472 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-11 20:02:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-11-11 20:02:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-11 20:02:31,223 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:02:31,223 INFO L218 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] [2024-11-11 20:02:31,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 20:02:31,224 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:02:31,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:02:31,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2061833476, now seen corresponding path program 1 times [2024-11-11 20:02:31,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:02:31,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140150305] [2024-11-11 20:02:31,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:02:31,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:02:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:02:31,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307938012] [2024-11-11 20:02:31,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:02:31,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:02:31,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:02:31,292 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:02:31,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 20:02:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:02:31,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-11 20:02:31,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:02:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-11 20:02:31,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:02:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 20:02:32,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:02:32,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140150305] [2024-11-11 20:02:32,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:02:32,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307938012] [2024-11-11 20:02:32,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307938012] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-11 20:02:32,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 20:02:32,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2024-11-11 20:02:32,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121846244] [2024-11-11 20:02:32,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:02:32,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-11 20:02:32,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:02:32,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-11 20:02:32,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-11 20:02:32,141 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 20:02:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:02:32,312 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2024-11-11 20:02:32,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 20:02:32,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2024-11-11 20:02:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:02:32,314 INFO L225 Difference]: With dead ends: 37 [2024-11-11 20:02:32,314 INFO L226 Difference]: Without dead ends: 34 [2024-11-11 20:02:32,315 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-11 20:02:32,316 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:02:32,317 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 91 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:02:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-11 20:02:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-11 20:02:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-11 20:02:32,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-11-11 20:02:32,328 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2024-11-11 20:02:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:02:32,330 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-11-11 20:02:32,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 20:02:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-11-11 20:02:32,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-11 20:02:32,333 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:02:32,333 INFO L218 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] [2024-11-11 20:02:32,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-11 20:02:32,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:02:32,538 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:02:32,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:02:32,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1044269705, now seen corresponding path program 1 times [2024-11-11 20:02:32,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:02:32,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434523655] [2024-11-11 20:02:32,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:02:32,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:02:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:02:32,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935441596] [2024-11-11 20:02:32,574 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:02:32,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:02:32,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:02:32,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:02:32,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 20:02:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:02:32,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-11 20:02:32,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:02:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-11 20:02:32,848 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:02:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-11 20:02:33,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:02:33,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434523655] [2024-11-11 20:02:33,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:02:33,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935441596] [2024-11-11 20:02:33,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935441596] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-11 20:02:33,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 20:02:33,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2024-11-11 20:02:33,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111050609] [2024-11-11 20:02:33,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:02:33,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-11 20:02:33,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:02:33,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-11 20:02:33,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-11 20:02:33,270 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 20:02:37,520 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] [2024-11-11 20:02:37,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:02:37,685 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2024-11-11 20:02:37,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 20:02:37,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2024-11-11 20:02:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:02:37,687 INFO L225 Difference]: With dead ends: 44 [2024-11-11 20:02:37,687 INFO L226 Difference]: Without dead ends: 41 [2024-11-11 20:02:37,687 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-11 20:02:37,688 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-11 20:02:37,689 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 111 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-11-11 20:02:37,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-11 20:02:37,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2024-11-11 20:02:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-11 20:02:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-11-11 20:02:37,697 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 33 [2024-11-11 20:02:37,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:02:37,697 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-11-11 20:02:37,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 20:02:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-11-11 20:02:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-11 20:02:37,699 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:02:37,699 INFO L218 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] [2024-11-11 20:02:37,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 20:02:37,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-11 20:02:37,904 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:02:37,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:02:37,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1786164585, now seen corresponding path program 1 times [2024-11-11 20:02:37,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:02:37,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17309397] [2024-11-11 20:02:37,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:02:37,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:02:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:02:38,439 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:02:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:02:38,447 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 20:02:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:02:38,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:02:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:02:38,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:02:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:02:38,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-11 20:02:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:02:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 20:02:38,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:02:38,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17309397] [2024-11-11 20:02:38,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17309397] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:02:38,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:02:38,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-11 20:02:38,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581989008] [2024-11-11 20:02:38,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:02:38,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-11 20:02:38,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:02:38,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-11 20:02:38,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-11 20:02:38,478 INFO L87 Difference]: Start difference. First operand 32 states and 38 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-11 20:02:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:02:38,525 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2024-11-11 20:02:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 20:02:38,526 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-11-11 20:02:38,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:02:38,527 INFO L225 Difference]: With dead ends: 48 [2024-11-11 20:02:38,527 INFO L226 Difference]: Without dead ends: 34 [2024-11-11 20:02:38,528 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-11 20:02:38,529 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:02:38,529 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 73 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:02:38,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-11 20:02:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-11 20:02:38,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-11 20:02:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2024-11-11 20:02:38,538 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 39 [2024-11-11 20:02:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:02:38,539 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2024-11-11 20:02:38,539 INFO L472 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-11 20:02:38,539 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2024-11-11 20:02:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-11 20:02:38,540 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:02:38,541 INFO L218 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] [2024-11-11 20:02:38,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-11 20:02:38,541 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:02:38,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:02:38,542 INFO L85 PathProgramCache]: Analyzing trace with hash 145189394, now seen corresponding path program 1 times [2024-11-11 20:02:38,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:02:38,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356471997] [2024-11-11 20:02:38,542 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:02:38,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:02:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:02:38,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620467871] [2024-11-11 20:02:38,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:02:38,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:02:38,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:02:38,579 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:02:38,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 20:02:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:02:38,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-11 20:02:38,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:02:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-11 20:02:39,231 INFO L312 TraceCheckSpWp]: Computing backward predicates...