./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound100.c --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/geo1-ll_valuebound100.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 b3d0d63b4f79c4f9ae0c19cc6d4aa64fc14c5b293d51178c1ef9a9e32f786662 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 20:09:15,627 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 20:09:15,703 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 20:09:15,717 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 20:09:15,719 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 20:09:15,751 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 20:09:15,752 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 20:09:15,752 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 20:09:15,753 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 20:09:15,754 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 20:09:15,755 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 20:09:15,756 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 20:09:15,756 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 20:09:15,757 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 20:09:15,759 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 20:09:15,759 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 20:09:15,760 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 20:09:15,760 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 20:09:15,760 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 20:09:15,760 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 20:09:15,760 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 20:09:15,761 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 20:09:15,765 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 20:09:15,765 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 20:09:15,765 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 20:09:15,766 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 20:09:15,766 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 20:09:15,766 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 20:09:15,766 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 20:09:15,767 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 20:09:15,767 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 20:09:15,767 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 20:09:15,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:09:15,767 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 20:09:15,767 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 20:09:15,768 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 20:09:15,768 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 20:09:15,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 20:09:15,768 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 20:09:15,768 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 20:09:15,769 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 20:09:15,769 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 20:09:15,769 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3d0d63b4f79c4f9ae0c19cc6d4aa64fc14c5b293d51178c1ef9a9e32f786662 [2024-11-11 20:09:16,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 20:09:16,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 20:09:16,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 20:09:16,063 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 20:09:16,063 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 20:09:16,065 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound100.c [2024-11-11 20:09:17,605 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 20:09:17,800 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 20:09:17,800 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound100.c [2024-11-11 20:09:17,808 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c882a27ca/c054306602c3489390e8dd9b6f2008b6/FLAG2b4d95e26 [2024-11-11 20:09:18,191 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c882a27ca/c054306602c3489390e8dd9b6f2008b6 [2024-11-11 20:09:18,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 20:09:18,196 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 20:09:18,197 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 20:09:18,197 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 20:09:18,206 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 20:09:18,207 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:09:18" (1/1) ... [2024-11-11 20:09:18,208 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21710f65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18, skipping insertion in model container [2024-11-11 20:09:18,208 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:09:18" (1/1) ... [2024-11-11 20:09:18,230 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 20:09:18,414 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/geo1-ll_valuebound100.c[545,558] [2024-11-11 20:09:18,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:09:18,446 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 20:09:18,458 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/geo1-ll_valuebound100.c[545,558] [2024-11-11 20:09:18,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:09:18,482 INFO L204 MainTranslator]: Completed translation [2024-11-11 20:09:18,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18 WrapperNode [2024-11-11 20:09:18,483 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 20:09:18,484 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 20:09:18,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 20:09:18,485 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 20:09:18,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18" (1/1) ... [2024-11-11 20:09:18,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18" (1/1) ... [2024-11-11 20:09:18,516 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 43 [2024-11-11 20:09:18,518 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 20:09:18,519 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 20:09:18,519 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 20:09:18,519 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 20:09:18,529 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18" (1/1) ... [2024-11-11 20:09:18,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18" (1/1) ... [2024-11-11 20:09:18,531 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18" (1/1) ... [2024-11-11 20:09:18,545 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 20:09:18,546 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18" (1/1) ... [2024-11-11 20:09:18,546 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18" (1/1) ... [2024-11-11 20:09:18,549 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18" (1/1) ... [2024-11-11 20:09:18,552 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18" (1/1) ... [2024-11-11 20:09:18,555 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18" (1/1) ... [2024-11-11 20:09:18,555 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18" (1/1) ... [2024-11-11 20:09:18,556 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 20:09:18,558 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 20:09:18,559 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 20:09:18,559 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 20:09:18,560 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18" (1/1) ... [2024-11-11 20:09:18,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:09:18,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:09:18,599 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 20:09:18,601 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 20:09:18,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 20:09:18,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-11 20:09:18,643 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-11 20:09:18,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 20:09:18,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 20:09:18,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 20:09:18,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-11 20:09:18,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-11 20:09:18,698 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 20:09:18,701 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 20:09:18,812 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-11 20:09:18,812 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 20:09:18,824 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 20:09:18,824 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-11 20:09:18,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:09:18 BoogieIcfgContainer [2024-11-11 20:09:18,825 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 20:09:18,829 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 20:09:18,830 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 20:09:18,834 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 20:09:18,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 08:09:18" (1/3) ... [2024-11-11 20:09:18,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d8d763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:09:18, skipping insertion in model container [2024-11-11 20:09:18,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:09:18" (2/3) ... [2024-11-11 20:09:18,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d8d763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:09:18, skipping insertion in model container [2024-11-11 20:09:18,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:09:18" (3/3) ... [2024-11-11 20:09:18,836 INFO L112 eAbstractionObserver]: Analyzing ICFG geo1-ll_valuebound100.c [2024-11-11 20:09:18,849 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 20:09:18,850 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 20:09:18,905 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 20:09:18,911 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;@cebb936, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 20:09:18,912 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 20:09:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 20:09:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-11 20:09:18,926 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:09:18,926 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] [2024-11-11 20:09:18,927 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:09:18,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:09:18,933 INFO L85 PathProgramCache]: Analyzing trace with hash -439363615, now seen corresponding path program 1 times [2024-11-11 20:09:18,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:09:18,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002460641] [2024-11-11 20:09:18,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:09:18,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:09:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:09:19,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:09:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:09:19,152 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 20:09:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:09:19,165 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:09:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:09:19,175 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:09:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:09:19,189 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 20:09:19,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:09:19,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002460641] [2024-11-11 20:09:19,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002460641] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:09:19,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:09:19,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-11 20:09:19,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110086947] [2024-11-11 20:09:19,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:09:19,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-11 20:09:19,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:09:19,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-11 20:09:19,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 20:09:19,281 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 20:09:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:09:19,309 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2024-11-11 20:09:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-11 20:09:19,312 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 29 [2024-11-11 20:09:19,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:09:19,320 INFO L225 Difference]: With dead ends: 51 [2024-11-11 20:09:19,320 INFO L226 Difference]: Without dead ends: 23 [2024-11-11 20:09:19,324 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 20:09:19,330 INFO L435 NwaCegarLoop]: 31 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, 31 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 20:09:19,331 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:09:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-11 20:09:19,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-11 20:09:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 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 20:09:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-11-11 20:09:19,367 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 29 [2024-11-11 20:09:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:09:19,367 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-11-11 20:09:19,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 20:09:19,368 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-11-11 20:09:19,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-11 20:09:19,369 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:09:19,369 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] [2024-11-11 20:09:19,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 20:09:19,370 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:09:19,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:09:19,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1976149669, now seen corresponding path program 1 times [2024-11-11 20:09:19,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:09:19,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683223491] [2024-11-11 20:09:19,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:09:19,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:09:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:09:19,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535540546] [2024-11-11 20:09:19,423 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:09:19,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:09:19,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:09:19,425 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 20:09:19,427 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 20:09:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:09:19,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-11 20:09:19,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:09:19,625 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 20:09:19,625 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 20:09:19,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:09:19,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683223491] [2024-11-11 20:09:19,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:09:19,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535540546] [2024-11-11 20:09:19,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535540546] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:09:19,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:09:19,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 20:09:19,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292604963] [2024-11-11 20:09:19,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:09:19,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 20:09:19,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:09:19,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 20:09:19,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 20:09:19,635 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 20:09:19,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:09:19,695 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-11-11 20:09:19,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 20:09:19,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 29 [2024-11-11 20:09:19,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:09:19,697 INFO L225 Difference]: With dead ends: 33 [2024-11-11 20:09:19,698 INFO L226 Difference]: Without dead ends: 31 [2024-11-11 20:09:19,699 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-11 20:09:19,701 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:09:19,702 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 85 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:09:19,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-11 20:09:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-11-11 20:09:19,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-11 20:09:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-11 20:09:19,715 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 29 [2024-11-11 20:09:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:09:19,716 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-11 20:09:19,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 20:09:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-11 20:09:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-11 20:09:19,718 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:09:19,718 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, 1, 1, 1] [2024-11-11 20:09:19,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-11 20:09:19,920 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 20:09:19,920 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:09:19,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:09:19,921 INFO L85 PathProgramCache]: Analyzing trace with hash -900153941, now seen corresponding path program 1 times [2024-11-11 20:09:19,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:09:19,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671151794] [2024-11-11 20:09:19,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:09:19,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:09:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:09:20,446 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:09:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:09:20,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 20:09:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:09:20,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:09:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:09:20,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:09:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:09:20,462 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 20:09:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:09:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 20:09:20,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:09:20,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671151794] [2024-11-11 20:09:20,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671151794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:09:20,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996311621] [2024-11-11 20:09:20,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:09:20,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:09:20,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:09:20,510 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 20:09:20,512 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 20:09:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:09:20,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-11 20:09:20,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:09:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 20:09:20,702 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 20:09:20,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996311621] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:09:20,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 20:09:20,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-11-11 20:09:20,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470092873] [2024-11-11 20:09:20,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:09:20,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-11 20:09:20,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:09:20,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-11 20:09:20,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-11 20:09:20,708 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 20:09:20,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:09:20,769 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2024-11-11 20:09:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-11 20:09:20,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 36 [2024-11-11 20:09:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:09:20,772 INFO L225 Difference]: With dead ends: 38 [2024-11-11 20:09:20,772 INFO L226 Difference]: Without dead ends: 30 [2024-11-11 20:09:20,773 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-11 20:09:20,775 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:09:20,776 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 105 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:09:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-11 20:09:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-11 20:09:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 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 20:09:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-11 20:09:20,785 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 36 [2024-11-11 20:09:20,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:09:20,786 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-11 20:09:20,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 20:09:20,786 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-11 20:09:20,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-11 20:09:20,787 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:09:20,788 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] [2024-11-11 20:09:20,803 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 20:09:20,992 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 20:09:20,993 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:09:20,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:09:20,994 INFO L85 PathProgramCache]: Analyzing trace with hash -852190431, now seen corresponding path program 1 times [2024-11-11 20:09:20,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:09:20,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988207167] [2024-11-11 20:09:20,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:09:20,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:09:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:09:21,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439522329] [2024-11-11 20:09:21,037 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:09:21,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:09:21,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:09:21,042 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 20:09:21,047 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 20:09:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:09:21,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-11 20:09:21,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:09:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-11 20:09:21,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:09:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 20:09:25,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:09:25,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988207167] [2024-11-11 20:09:25,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:09:25,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439522329] [2024-11-11 20:09:25,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439522329] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:09:25,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 20:09:25,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2024-11-11 20:09:25,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2513568] [2024-11-11 20:09:25,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 20:09:25,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-11 20:09:25,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:09:25,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-11 20:09:25,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2024-11-11 20:09:25,461 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-11 20:09:34,174 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 [] [2024-11-11 20:09:46,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-11 20:09:50,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-11 20:09:54,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-11 20:09:58,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-11 20:10:02,248 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 [] [2024-11-11 20:10:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:10:02,260 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2024-11-11 20:10:02,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-11 20:10:02,261 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 36 [2024-11-11 20:10:02,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:10:02,263 INFO L225 Difference]: With dead ends: 48 [2024-11-11 20:10:02,263 INFO L226 Difference]: Without dead ends: 46 [2024-11-11 20:10:02,263 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=43, Invalid=136, Unknown=3, NotChecked=0, Total=182 [2024-11-11 20:10:02,264 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2024-11-11 20:10:02,266 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 154 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 6 Unknown, 0 Unchecked, 24.4s Time] [2024-11-11 20:10:02,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-11 20:10:02,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2024-11-11 20:10:02,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 20:10:02,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-11-11 20:10:02,280 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 36 [2024-11-11 20:10:02,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:10:02,284 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-11-11 20:10:02,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-11 20:10:02,284 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-11-11 20:10:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-11 20:10:02,285 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:10:02,285 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:10:02,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-11 20:10:02,486 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 [2024-11-11 20:10:02,486 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:10:02,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:10:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash 394593711, now seen corresponding path program 1 times [2024-11-11 20:10:02,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:10:02,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273247622] [2024-11-11 20:10:02,487 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:10:02,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:10:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:10:02,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:10:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:10:02,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 20:10:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:10:02,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:10:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:10:02,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:10:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:10:02,801 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 20:10:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:10:02,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-11 20:10:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:10:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-11 20:10:02,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:10:02,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273247622] [2024-11-11 20:10:02,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273247622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:10:02,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135961820] [2024-11-11 20:10:02,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:10:02,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:10:02,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:10:02,864 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) [2024-11-11 20:10:02,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 20:10:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:10:02,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-11 20:10:02,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:10:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-11 20:10:11,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:10:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-11 20:10:11,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135961820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:10:11,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:10:11,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2024-11-11 20:10:11,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189989232] [2024-11-11 20:10:11,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:10:11,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-11 20:10:11,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:10:11,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-11 20:10:11,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=83, Unknown=2, NotChecked=0, Total=110 [2024-11-11 20:10:11,730 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-11 20:10:15,807 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 [] [2024-11-11 20:10:15,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:10:15,841 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2024-11-11 20:10:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-11 20:10:15,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2024-11-11 20:10:15,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:10:15,844 INFO L225 Difference]: With dead ends: 48 [2024-11-11 20:10:15,844 INFO L226 Difference]: Without dead ends: 40 [2024-11-11 20:10:15,844 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=33, Invalid=97, Unknown=2, NotChecked=0, Total=132 [2024-11-11 20:10:15,845 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:10:15,845 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 156 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2024-11-11 20:10:15,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-11 20:10:15,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-11 20:10:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 20:10:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2024-11-11 20:10:15,855 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 43 [2024-11-11 20:10:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:10:15,856 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2024-11-11 20:10:15,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-11 20:10:15,856 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2024-11-11 20:10:15,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-11 20:10:15,859 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:10:15,860 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:10:15,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-11 20:10:16,060 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 [2024-11-11 20:10:16,060 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:10:16,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:10:16,061 INFO L85 PathProgramCache]: Analyzing trace with hash -984334427, now seen corresponding path program 2 times [2024-11-11 20:10:16,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:10:16,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523089814] [2024-11-11 20:10:16,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:10:16,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:10:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:10:16,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076005467] [2024-11-11 20:10:16,110 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 20:10:16,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:10:16,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:10:16,113 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:10:16,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 20:10:16,191 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 20:10:16,192 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:10:16,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-11 20:10:16,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:10:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-11 20:10:16,544 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:10:33,123 WARN L873 $PredicateComparison]: unable to prove that (or (= (mod (+ (* 18446744073709551615 |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1| |c_ULTIMATE.start_main_~z~0#1|) |c_ULTIMATE.start_main_~z~0#1| (* |c_ULTIMATE.start_main_~y~0#1| 18446744073709551615 |c_ULTIMATE.start_main_~z~0#1|)) 18446744073709551616) 0) (not (= (mod (+ (* 18446744073709551615 |c_ULTIMATE.start_main_~x~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 18446744073709551615) 1) 18446744073709551616) 0))) is different from true [2024-11-11 20:10:53,549 WARN L873 $PredicateComparison]: unable to prove that (or (= (mod (+ (* 18446744073709551615 |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1| |c_ULTIMATE.start_main_~z~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 18446744073709551615 |c_ULTIMATE.start_main_~z~0#1| |c_ULTIMATE.start_main_~z~0#1|) (* |c_ULTIMATE.start_main_~z~0#1| |c_ULTIMATE.start_main_~z~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1| |c_ULTIMATE.start_main_~z~0#1| |c_ULTIMATE.start_main_~z~0#1|)) 18446744073709551616) 0) (not (= (mod (+ (* 18446744073709551615 |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1| |c_ULTIMATE.start_main_~z~0#1|) |c_ULTIMATE.start_main_~z~0#1| (* |c_ULTIMATE.start_main_~y~0#1| 18446744073709551615 |c_ULTIMATE.start_main_~z~0#1|)) 18446744073709551616) 0))) is different from true