./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/iftelse.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc 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/loops-crafted-1/iftelse.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 a98f1431f10d7e60a67a648eec648b7f5eb5616fa0d511e794bbda916609379b --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 13:20:57,757 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 13:20:57,837 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 13:20:57,851 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 13:20:57,852 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 13:20:57,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 13:20:57,872 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 13:20:57,873 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 13:20:57,874 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 13:20:57,876 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 13:20:57,876 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 13:20:57,877 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 13:20:57,877 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 13:20:57,878 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 13:20:57,878 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 13:20:57,879 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 13:20:57,880 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 13:20:57,880 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 13:20:57,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 13:20:57,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 13:20:57,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 13:20:57,882 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 13:20:57,882 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 13:20:57,882 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 13:20:57,883 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 13:20:57,883 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 13:20:57,883 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 13:20:57,884 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 13:20:57,884 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 13:20:57,884 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 13:20:57,885 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 13:20:57,885 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 13:20:57,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:20:57,886 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 13:20:57,886 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 13:20:57,886 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 13:20:57,886 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 13:20:57,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 13:20:57,887 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 13:20:57,887 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 13:20:57,888 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 13:20:57,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 13:20:57,888 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98f1431f10d7e60a67a648eec648b7f5eb5616fa0d511e794bbda916609379b [2024-11-18 13:20:58,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 13:20:58,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 13:20:58,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 13:20:58,187 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 13:20:58,187 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 13:20:58,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/iftelse.c [2024-11-18 13:20:59,706 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 13:20:59,891 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 13:20:59,892 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/iftelse.c [2024-11-18 13:20:59,899 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44df1ec81/c9a30661aa5e4349bc11986a1c109393/FLAG085c63f18 [2024-11-18 13:20:59,914 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44df1ec81/c9a30661aa5e4349bc11986a1c109393 [2024-11-18 13:20:59,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 13:20:59,918 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 13:20:59,919 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 13:20:59,919 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 13:20:59,925 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 13:20:59,925 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:20:59" (1/1) ... [2024-11-18 13:20:59,926 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e7cfc11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:20:59, skipping insertion in model container [2024-11-18 13:20:59,926 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:20:59" (1/1) ... [2024-11-18 13:20:59,945 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 13:21:00,129 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/loops-crafted-1/iftelse.c[406,419] [2024-11-18 13:21:00,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:21:00,158 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 13:21:00,170 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/loops-crafted-1/iftelse.c[406,419] [2024-11-18 13:21:00,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:21:00,193 INFO L204 MainTranslator]: Completed translation [2024-11-18 13:21:00,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:21:00 WrapperNode [2024-11-18 13:21:00,194 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 13:21:00,195 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 13:21:00,195 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 13:21:00,196 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 13:21:00,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:21:00" (1/1) ... [2024-11-18 13:21:00,211 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:21:00" (1/1) ... [2024-11-18 13:21:00,229 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2024-11-18 13:21:00,230 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 13:21:00,231 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 13:21:00,231 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 13:21:00,231 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 13:21:00,242 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:21:00" (1/1) ... [2024-11-18 13:21:00,243 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:21:00" (1/1) ... [2024-11-18 13:21:00,244 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:21:00" (1/1) ... [2024-11-18 13:21:00,266 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]. [2024-11-18 13:21:00,266 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:21:00" (1/1) ... [2024-11-18 13:21:00,267 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:21:00" (1/1) ... [2024-11-18 13:21:00,270 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:21:00" (1/1) ... [2024-11-18 13:21:00,275 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:21:00" (1/1) ... [2024-11-18 13:21:00,276 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:21:00" (1/1) ... [2024-11-18 13:21:00,279 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:21:00" (1/1) ... [2024-11-18 13:21:00,281 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 13:21:00,286 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 13:21:00,286 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 13:21:00,286 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 13:21:00,287 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:21:00" (1/1) ... [2024-11-18 13:21:00,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:21:00,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:21:00,325 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) [2024-11-18 13:21:00,329 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 [2024-11-18 13:21:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 13:21:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 13:21:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 13:21:00,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 13:21:00,422 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 13:21:00,424 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 13:21:00,563 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-18 13:21:00,563 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 13:21:00,574 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 13:21:00,575 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-18 13:21:00,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:21:00 BoogieIcfgContainer [2024-11-18 13:21:00,576 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 13:21:00,578 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 13:21:00,578 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 13:21:00,581 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 13:21:00,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:20:59" (1/3) ... [2024-11-18 13:21:00,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43536e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:21:00, skipping insertion in model container [2024-11-18 13:21:00,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:21:00" (2/3) ... [2024-11-18 13:21:00,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43536e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:21:00, skipping insertion in model container [2024-11-18 13:21:00,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:21:00" (3/3) ... [2024-11-18 13:21:00,585 INFO L112 eAbstractionObserver]: Analyzing ICFG iftelse.c [2024-11-18 13:21:00,601 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 13:21:00,602 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 13:21:00,655 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 13:21:00,661 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;@77315102, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 13:21:00,662 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 13:21:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 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) [2024-11-18 13:21:00,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-18 13:21:00,673 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:21:00,674 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:21:00,676 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:21:00,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:21:00,684 INFO L85 PathProgramCache]: Analyzing trace with hash 183324244, now seen corresponding path program 1 times [2024-11-18 13:21:00,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:21:00,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075001458] [2024-11-18 13:21:00,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:21:00,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:21:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:21:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:21:01,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:21:01,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075001458] [2024-11-18 13:21:01,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075001458] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:21:01,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:21:01,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 13:21:01,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871472046] [2024-11-18 13:21:01,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:21:01,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 13:21:01,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:21:01,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 13:21:01,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-18 13:21:01,670 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 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) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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) [2024-11-18 13:21:01,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:21:01,807 INFO L93 Difference]: Finished difference Result 31 states and 47 transitions. [2024-11-18 13:21:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 13:21:01,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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) Word has length 8 [2024-11-18 13:21:01,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:21:01,817 INFO L225 Difference]: With dead ends: 31 [2024-11-18 13:21:01,817 INFO L226 Difference]: Without dead ends: 16 [2024-11-18 13:21:01,820 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:21:01,826 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:21:01,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 47 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:21:01,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-18 13:21:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2024-11-18 13:21:01,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2024-11-18 13:21:01,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2024-11-18 13:21:01,861 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2024-11-18 13:21:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:21:01,862 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2024-11-18 13:21:01,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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) [2024-11-18 13:21:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2024-11-18 13:21:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-18 13:21:01,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:21:01,863 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:21:01,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 13:21:01,863 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:21:01,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:21:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1425053575, now seen corresponding path program 1 times [2024-11-18 13:21:01,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:21:01,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906167607] [2024-11-18 13:21:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:21:01,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:21:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:21:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:21:01,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:21:01,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906167607] [2024-11-18 13:21:01,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906167607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:21:01,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:21:01,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 13:21:01,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350098608] [2024-11-18 13:21:01,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:21:01,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 13:21:01,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:21:01,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 13:21:01,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:21:01,918 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2024-11-18 13:21:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:21:01,929 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2024-11-18 13:21:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 13:21:01,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2024-11-18 13:21:01,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:21:01,931 INFO L225 Difference]: With dead ends: 22 [2024-11-18 13:21:01,931 INFO L226 Difference]: Without dead ends: 14 [2024-11-18 13:21:01,932 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:21:01,934 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:21:01,935 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:21:01,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-18 13:21:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-18 13:21:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2024-11-18 13:21:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-11-18 13:21:01,940 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2024-11-18 13:21:01,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:21:01,940 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-11-18 13:21:01,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2024-11-18 13:21:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-11-18 13:21:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-18 13:21:01,941 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:21:01,941 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:21:01,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 13:21:01,941 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:21:01,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:21:01,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2117156515, now seen corresponding path program 1 times [2024-11-18 13:21:01,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:21:01,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168763206] [2024-11-18 13:21:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:21:01,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:21:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:21:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:21:02,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:21:02,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168763206] [2024-11-18 13:21:02,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168763206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:21:02,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021429698] [2024-11-18 13:21:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:21:02,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:21:02,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:21:02,136 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) [2024-11-18 13:21:02,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 13:21:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:21:02,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-18 13:21:02,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:21:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:21:02,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:21:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:21:02,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021429698] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:21:02,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:21:02,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2024-11-18 13:21:02,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009724624] [2024-11-18 13:21:02,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:21:02,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-18 13:21:02,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:21:02,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-18 13:21:02,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-18 13:21:02,313 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2024-11-18 13:21:02,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:21:02,367 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2024-11-18 13:21:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 13:21:02,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) Word has length 13 [2024-11-18 13:21:02,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:21:02,369 INFO L225 Difference]: With dead ends: 37 [2024-11-18 13:21:02,369 INFO L226 Difference]: Without dead ends: 30 [2024-11-18 13:21:02,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-18 13:21:02,372 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:21:02,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:21:02,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-18 13:21:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2024-11-18 13:21:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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) [2024-11-18 13:21:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2024-11-18 13:21:02,381 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2024-11-18 13:21:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:21:02,382 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2024-11-18 13:21:02,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2024-11-18 13:21:02,382 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2024-11-18 13:21:02,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-18 13:21:02,383 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:21:02,383 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:21:02,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-18 13:21:02,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:21:02,584 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:21:02,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:21:02,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2117216097, now seen corresponding path program 1 times [2024-11-18 13:21:02,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:21:02,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180633439] [2024-11-18 13:21:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:21:02,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:21:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:21:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:21:03,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:21:03,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180633439] [2024-11-18 13:21:03,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180633439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:21:03,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833445220] [2024-11-18 13:21:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:21:03,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:21:03,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:21:03,035 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) [2024-11-18 13:21:03,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 13:21:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:21:03,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-18 13:21:03,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:21:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:21:03,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:21:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:21:03,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833445220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:21:03,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:21:03,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-18 13:21:03,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873938756] [2024-11-18 13:21:03,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:21:03,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-18 13:21:03,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:21:03,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-18 13:21:03,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-18 13:21:03,420 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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) [2024-11-18 13:21:04,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-18 13:21:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:21:04,936 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2024-11-18 13:21:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 13:21:04,937 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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) Word has length 13 [2024-11-18 13:21:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:21:04,937 INFO L225 Difference]: With dead ends: 40 [2024-11-18 13:21:04,937 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 13:21:04,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-11-18 13:21:04,939 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-18 13:21:04,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 47 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-18 13:21:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 13:21:04,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2024-11-18 13:21:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 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) [2024-11-18 13:21:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2024-11-18 13:21:04,949 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 13 [2024-11-18 13:21:04,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:21:04,950 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2024-11-18 13:21:04,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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) [2024-11-18 13:21:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2024-11-18 13:21:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-18 13:21:04,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:21:04,951 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-18 13:21:04,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 13:21:05,155 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,SelfDestructingSolverStorable3 [2024-11-18 13:21:05,156 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:21:05,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:21:05,157 INFO L85 PathProgramCache]: Analyzing trace with hash -683997770, now seen corresponding path program 2 times [2024-11-18 13:21:05,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:21:05,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606042328] [2024-11-18 13:21:05,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:21:05,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:21:05,178 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:21:05,179 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:21:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:21:05,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:21:05,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606042328] [2024-11-18 13:21:05,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606042328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:21:05,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574252186] [2024-11-18 13:21:05,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:21:05,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:21:05,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:21:05,569 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) [2024-11-18 13:21:05,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 13:21:05,625 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:21:05,625 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:21:05,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-18 13:21:05,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:21:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:21:05,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:21:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:21:06,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574252186] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:21:06,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:21:06,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-11-18 13:21:06,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601706943] [2024-11-18 13:21:06,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:21:06,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-18 13:21:06,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:21:06,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-18 13:21:06,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2024-11-18 13:21:06,085 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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) [2024-11-18 13:21:12,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-18 13:21:12,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:21:12,897 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2024-11-18 13:21:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-18 13:21:12,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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) Word has length 18 [2024-11-18 13:21:12,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:21:12,899 INFO L225 Difference]: With dead ends: 57 [2024-11-18 13:21:12,900 INFO L226 Difference]: Without dead ends: 55 [2024-11-18 13:21:12,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=306, Invalid=750, Unknown=0, NotChecked=0, Total=1056 [2024-11-18 13:21:12,901 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 81 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-18 13:21:12,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 67 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-18 13:21:12,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-18 13:21:12,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2024-11-18 13:21:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 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) [2024-11-18 13:21:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2024-11-18 13:21:12,913 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 18 [2024-11-18 13:21:12,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:21:12,913 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2024-11-18 13:21:12,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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) [2024-11-18 13:21:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2024-11-18 13:21:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-18 13:21:12,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:21:12,914 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 1, 1, 1, 1, 1] [2024-11-18 13:21:12,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 13:21:13,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:21:13,119 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:21:13,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:21:13,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1469978013, now seen corresponding path program 3 times [2024-11-18 13:21:13,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:21:13,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194787776] [2024-11-18 13:21:13,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 13:21:13,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:21:13,192 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 13:21:13,192 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:21:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 13:21:14,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:21:14,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194787776] [2024-11-18 13:21:14,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194787776] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:21:14,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939624138] [2024-11-18 13:21:14,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 13:21:14,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:21:14,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:21:14,947 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) [2024-11-18 13:21:14,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 13:21:18,072 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 13:21:18,072 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:21:18,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-18 13:21:18,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:21:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 13:21:57,218 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:22:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 13:22:18,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939624138] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:22:18,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:22:18,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2024-11-18 13:22:18,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124187749] [2024-11-18 13:22:18,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:22:18,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-18 13:22:18,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:22:18,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-18 13:22:18,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=919, Unknown=4, NotChecked=0, Total=1122 [2024-11-18 13:22:18,978 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 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) [2024-11-18 13:22:21,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []