./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/mannadiv.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/mannadiv.c -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 4f0dc25e497896e48962fc4f59a3ea4856b5eb0408b9845e68b04a0b0a132067 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 18:43:20,386 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 18:43:20,453 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 18:43:20,458 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 18:43:20,459 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 18:43:20,483 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 18:43:20,483 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 18:43:20,484 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 18:43:20,485 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 18:43:20,486 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 18:43:20,487 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 18:43:20,487 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 18:43:20,488 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 18:43:20,488 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 18:43:20,489 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 18:43:20,489 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 18:43:20,490 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 18:43:20,490 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 18:43:20,490 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 18:43:20,490 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 18:43:20,491 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 18:43:20,491 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 18:43:20,491 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 18:43:20,492 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 18:43:20,492 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 18:43:20,492 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 18:43:20,493 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 18:43:20,493 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 18:43:20,493 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 18:43:20,494 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 18:43:20,494 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 18:43:20,494 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 18:43:20,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:43:20,495 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 18:43:20,495 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 18:43:20,495 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 18:43:20,495 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 18:43:20,496 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 18:43:20,496 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 18:43:20,496 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 18:43:20,496 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 18:43:20,496 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 18:43:20,497 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f0dc25e497896e48962fc4f59a3ea4856b5eb0408b9845e68b04a0b0a132067 [2024-10-12 18:43:20,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 18:43:20,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 18:43:20,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 18:43:20,802 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 18:43:20,803 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 18:43:20,804 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/mannadiv.c [2024-10-12 18:43:22,108 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 18:43:22,317 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 18:43:22,317 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/mannadiv.c [2024-10-12 18:43:22,327 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/161607ecd/4de2221a7e2a42c396b8833a6fcc9ec4/FLAGd0619449f [2024-10-12 18:43:22,718 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/161607ecd/4de2221a7e2a42c396b8833a6fcc9ec4 [2024-10-12 18:43:22,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 18:43:22,721 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 18:43:22,724 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 18:43:22,724 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 18:43:22,729 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 18:43:22,729 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:43:22" (1/1) ... [2024-10-12 18:43:22,730 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347ff57d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22, skipping insertion in model container [2024-10-12 18:43:22,730 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:43:22" (1/1) ... [2024-10-12 18:43:22,747 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 18:43:22,911 WARN L248 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/mannadiv.c[573,586] [2024-10-12 18:43:22,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:43:22,939 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 18:43:22,951 WARN L248 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/mannadiv.c[573,586] [2024-10-12 18:43:22,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:43:22,973 INFO L204 MainTranslator]: Completed translation [2024-10-12 18:43:22,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22 WrapperNode [2024-10-12 18:43:22,975 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 18:43:22,976 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 18:43:22,976 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 18:43:22,976 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 18:43:22,983 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22" (1/1) ... [2024-10-12 18:43:22,989 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22" (1/1) ... [2024-10-12 18:43:23,006 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 43 [2024-10-12 18:43:23,007 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 18:43:23,008 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 18:43:23,008 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 18:43:23,008 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 18:43:23,018 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22" (1/1) ... [2024-10-12 18:43:23,018 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22" (1/1) ... [2024-10-12 18:43:23,023 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22" (1/1) ... [2024-10-12 18:43:23,034 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]. [2024-10-12 18:43:23,035 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22" (1/1) ... [2024-10-12 18:43:23,035 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22" (1/1) ... [2024-10-12 18:43:23,038 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22" (1/1) ... [2024-10-12 18:43:23,041 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22" (1/1) ... [2024-10-12 18:43:23,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22" (1/1) ... [2024-10-12 18:43:23,043 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22" (1/1) ... [2024-10-12 18:43:23,044 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 18:43:23,046 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 18:43:23,046 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 18:43:23,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 18:43:23,047 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22" (1/1) ... [2024-10-12 18:43:23,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:43:23,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:43:23,090 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) [2024-10-12 18:43:23,097 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 [2024-10-12 18:43:23,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 18:43:23,143 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-12 18:43:23,143 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-12 18:43:23,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 18:43:23,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 18:43:23,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 18:43:23,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 18:43:23,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 18:43:23,209 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 18:43:23,214 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 18:43:23,398 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-12 18:43:23,398 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 18:43:23,427 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 18:43:23,429 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-12 18:43:23,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:43:23 BoogieIcfgContainer [2024-10-12 18:43:23,429 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 18:43:23,432 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 18:43:23,433 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 18:43:23,436 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 18:43:23,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:43:22" (1/3) ... [2024-10-12 18:43:23,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e535db6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:43:23, skipping insertion in model container [2024-10-12 18:43:23,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:43:22" (2/3) ... [2024-10-12 18:43:23,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e535db6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:43:23, skipping insertion in model container [2024-10-12 18:43:23,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:43:23" (3/3) ... [2024-10-12 18:43:23,439 INFO L112 eAbstractionObserver]: Analyzing ICFG mannadiv.c [2024-10-12 18:43:23,455 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 18:43:23,455 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 18:43:23,514 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 18:43:23,521 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;@59eaa6f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 18:43:23,521 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 18:43:23,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 18:43:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-12 18:43:23,534 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:43:23,534 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:43:23,535 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:43:23,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:43:23,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1586152774, now seen corresponding path program 1 times [2024-10-12 18:43:23,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:43:23,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929400768] [2024-10-12 18:43:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:43:23,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:43:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:23,694 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:43:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:23,705 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:43:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:43:23,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:43:23,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929400768] [2024-10-12 18:43:23,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929400768] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:43:23,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:43:23,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 18:43:23,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237090855] [2024-10-12 18:43:23,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:43:23,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 18:43:23,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:43:23,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 18:43:23,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:43:23,742 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 18:43:23,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:43:23,766 INFO L93 Difference]: Finished difference Result 40 states and 57 transitions. [2024-10-12 18:43:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 18:43:23,768 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-10-12 18:43:23,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:43:23,774 INFO L225 Difference]: With dead ends: 40 [2024-10-12 18:43:23,775 INFO L226 Difference]: Without dead ends: 19 [2024-10-12 18:43:23,777 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:43:23,780 INFO L432 NwaCegarLoop]: 22 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, 22 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 [2024-10-12 18:43:23,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:43:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-12 18:43:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-10-12 18:43:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 18:43:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-10-12 18:43:23,822 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17 [2024-10-12 18:43:23,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:43:23,822 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-10-12 18:43:23,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 18:43:23,823 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-10-12 18:43:23,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-12 18:43:23,824 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:43:23,825 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:43:23,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 18:43:23,826 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:43:23,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:43:23,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1915424194, now seen corresponding path program 1 times [2024-10-12 18:43:23,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:43:23,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029931455] [2024-10-12 18:43:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:43:23,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:43:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:43:23,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797071154] [2024-10-12 18:43:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:43:23,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:43:23,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:43:23,859 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) [2024-10-12 18:43:23,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 18:43:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:23,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-12 18:43:23,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:43:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:43:24,045 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:43:24,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:43:24,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029931455] [2024-10-12 18:43:24,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:43:24,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797071154] [2024-10-12 18:43:24,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797071154] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:43:24,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:43:24,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:43:24,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529798167] [2024-10-12 18:43:24,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:43:24,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:43:24,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:43:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:43:24,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:43:24,053 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-12 18:43:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:43:24,116 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-10-12 18:43:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:43:24,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-10-12 18:43:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:43:24,119 INFO L225 Difference]: With dead ends: 29 [2024-10-12 18:43:24,119 INFO L226 Difference]: Without dead ends: 27 [2024-10-12 18:43:24,120 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:43:24,122 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:43:24,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 54 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:43:24,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-12 18:43:24,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2024-10-12 18:43:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 18:43:24,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-10-12 18:43:24,135 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2024-10-12 18:43:24,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:43:24,137 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-10-12 18:43:24,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-12 18:43:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-10-12 18:43:24,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-12 18:43:24,138 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:43:24,139 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:43:24,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 18:43:24,342 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 [2024-10-12 18:43:24,343 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:43:24,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:43:24,344 INFO L85 PathProgramCache]: Analyzing trace with hash -934914682, now seen corresponding path program 1 times [2024-10-12 18:43:24,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:43:24,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305127905] [2024-10-12 18:43:24,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:43:24,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:43:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:24,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:43:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:24,727 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:43:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:24,736 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 18:43:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:43:24,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:43:24,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305127905] [2024-10-12 18:43:24,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305127905] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:43:24,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084715930] [2024-10-12 18:43:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:43:24,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:43:24,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:43:24,795 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) [2024-10-12 18:43:24,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 18:43:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:24,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-12 18:43:24,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:43:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:43:24,948 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:43:24,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084715930] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:43:24,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:43:24,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-10-12 18:43:24,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188317990] [2024-10-12 18:43:24,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:43:24,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 18:43:24,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:43:24,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 18:43:24,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-12 18:43:24,951 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 18:43:25,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:43:25,003 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2024-10-12 18:43:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 18:43:25,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-10-12 18:43:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:43:25,006 INFO L225 Difference]: With dead ends: 34 [2024-10-12 18:43:25,007 INFO L226 Difference]: Without dead ends: 27 [2024-10-12 18:43:25,007 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-10-12 18:43:25,008 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:43:25,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 68 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:43:25,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-12 18:43:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-10-12 18:43:25,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 18:43:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-10-12 18:43:25,018 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2024-10-12 18:43:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:43:25,018 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-10-12 18:43:25,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 18:43:25,018 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-10-12 18:43:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 18:43:25,020 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:43:25,020 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:43:25,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 18:43:25,224 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 [2024-10-12 18:43:25,225 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:43:25,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:43:25,225 INFO L85 PathProgramCache]: Analyzing trace with hash -115543711, now seen corresponding path program 1 times [2024-10-12 18:43:25,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:43:25,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914266169] [2024-10-12 18:43:25,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:43:25,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:43:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:43:25,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765004139] [2024-10-12 18:43:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:43:25,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:43:25,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:43:25,241 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) [2024-10-12 18:43:25,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 18:43:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:25,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 18:43:25,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:43:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:43:25,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:43:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:43:25,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:43:25,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914266169] [2024-10-12 18:43:25,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:43:25,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765004139] [2024-10-12 18:43:25,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765004139] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:43:25,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:43:25,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-10-12 18:43:25,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044897899] [2024-10-12 18:43:25,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:43:25,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 18:43:25,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:43:25,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 18:43:25,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-12 18:43:25,550 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-12 18:43:25,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:43:25,650 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2024-10-12 18:43:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 18:43:25,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2024-10-12 18:43:25,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:43:25,651 INFO L225 Difference]: With dead ends: 50 [2024-10-12 18:43:25,651 INFO L226 Difference]: Without dead ends: 37 [2024-10-12 18:43:25,652 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-12 18:43:25,653 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:43:25,653 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 74 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:43:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-12 18:43:25,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2024-10-12 18:43:25,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 18:43:25,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-10-12 18:43:25,663 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2024-10-12 18:43:25,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:43:25,664 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-10-12 18:43:25,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-12 18:43:25,664 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-10-12 18:43:25,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-12 18:43:25,665 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:43:25,665 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:43:25,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 18:43:25,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:43:25,871 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:43:25,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:43:25,871 INFO L85 PathProgramCache]: Analyzing trace with hash -221434263, now seen corresponding path program 1 times [2024-10-12 18:43:25,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:43:25,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735006101] [2024-10-12 18:43:25,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:43:25,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:43:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:26,027 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:43:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:26,029 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:43:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:26,031 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 18:43:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:26,034 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-12 18:43:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-12 18:43:26,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:43:26,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735006101] [2024-10-12 18:43:26,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735006101] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:43:26,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834255964] [2024-10-12 18:43:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:43:26,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:43:26,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:43:26,054 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:43:26,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 18:43:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:43:26,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-12 18:43:26,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:43:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 18:43:26,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:43:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-12 18:43:26,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834255964] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:43:26,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:43:26,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 7] total 15 [2024-10-12 18:43:26,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854166961] [2024-10-12 18:43:26,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:43:26,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 18:43:26,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:43:26,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 18:43:26,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-10-12 18:43:26,325 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-12 18:43:26,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:43:26,446 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-10-12 18:43:26,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 18:43:26,447 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 31 [2024-10-12 18:43:26,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:43:26,448 INFO L225 Difference]: With dead ends: 34 [2024-10-12 18:43:26,448 INFO L226 Difference]: Without dead ends: 0 [2024-10-12 18:43:26,448 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-10-12 18:43:26,449 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:43:26,450 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 143 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:43:26,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-12 18:43:26,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-12 18:43:26,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:43:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-12 18:43:26,451 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2024-10-12 18:43:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:43:26,451 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-12 18:43:26,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-12 18:43:26,452 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-12 18:43:26,452 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-12 18:43:26,454 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-12 18:43:26,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-12 18:43:26,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:43:26,662 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-10-12 18:43:26,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-12 18:43:26,758 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-12 18:43:26,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 06:43:26 BoogieIcfgContainer [2024-10-12 18:43:26,779 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-12 18:43:26,780 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-12 18:43:26,780 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-12 18:43:26,780 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-12 18:43:26,781 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:43:23" (3/4) ... [2024-10-12 18:43:26,783 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-12 18:43:26,786 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-10-12 18:43:26,786 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-10-12 18:43:26,789 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-10-12 18:43:26,789 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-10-12 18:43:26,789 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-10-12 18:43:26,789 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-12 18:43:26,866 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-12 18:43:26,866 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-12 18:43:26,866 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-12 18:43:26,867 INFO L158 Benchmark]: Toolchain (without parser) took 4145.37ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 142.3MB in the beginning and 172.2MB in the end (delta: -29.9MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. [2024-10-12 18:43:26,867 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory was 79.6MB in the beginning and 79.4MB in the end (delta: 167.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-12 18:43:26,868 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.14ms. Allocated memory is still 172.0MB. Free memory was 141.7MB in the beginning and 129.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-12 18:43:26,868 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.78ms. Allocated memory is still 172.0MB. Free memory was 129.1MB in the beginning and 127.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-12 18:43:26,868 INFO L158 Benchmark]: Boogie Preprocessor took 37.01ms. Allocated memory is still 172.0MB. Free memory was 127.9MB in the beginning and 125.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-12 18:43:26,869 INFO L158 Benchmark]: RCFGBuilder took 383.64ms. Allocated memory is still 172.0MB. Free memory was 125.9MB in the beginning and 138.9MB in the end (delta: -13.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-12 18:43:26,869 INFO L158 Benchmark]: TraceAbstraction took 3347.14ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 137.9MB in the beginning and 177.3MB in the end (delta: -39.5MB). Peak memory consumption was 97.8MB. Max. memory is 16.1GB. [2024-10-12 18:43:26,869 INFO L158 Benchmark]: Witness Printer took 86.42ms. Allocated memory is still 207.6MB. Free memory was 176.4MB in the beginning and 172.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-12 18:43:26,871 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory was 79.6MB in the beginning and 79.4MB in the end (delta: 167.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.14ms. Allocated memory is still 172.0MB. Free memory was 141.7MB in the beginning and 129.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.78ms. Allocated memory is still 172.0MB. Free memory was 129.1MB in the beginning and 127.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.01ms. Allocated memory is still 172.0MB. Free memory was 127.9MB in the beginning and 125.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 383.64ms. Allocated memory is still 172.0MB. Free memory was 125.9MB in the beginning and 138.9MB in the end (delta: -13.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3347.14ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 137.9MB in the beginning and 177.3MB in the end (delta: -39.5MB). Peak memory consumption was 97.8MB. Max. memory is 16.1GB. * Witness Printer took 86.42ms. Allocated memory is still 207.6MB. Free memory was 176.4MB in the beginning and 172.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.2s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 32 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 29 mSDsluCounter, 361 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 280 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 260 IncrementalHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 81 mSDtfsCounter, 260 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 190 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=4, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 209 NumberOfCodeBlocks, 209 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 214 ConstructedInterpolants, 0 QuantifiedInterpolants, 601 SizeOfPredicates, 5 NumberOfNonLiveVariables, 296 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 70/81 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (x1 == ((((long long) x2 * y1) + y2) + y3)) - ProcedureContractResult [Line: 15]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= cond) Ensures: (1 <= cond) RESULT: Ultimate proved your program to be correct! [2024-10-12 18:43:26,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE