./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard2.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/hard2.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 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 19:55:35,239 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 19:55:35,308 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 19:55:35,313 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 19:55:35,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 19:55:35,348 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 19:55:35,348 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 19:55:35,349 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 19:55:35,349 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 19:55:35,353 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 19:55:35,353 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 19:55:35,354 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 19:55:35,354 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 19:55:35,354 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 19:55:35,355 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 19:55:35,355 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 19:55:35,355 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 19:55:35,355 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 19:55:35,356 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 19:55:35,356 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 19:55:35,356 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 19:55:35,358 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 19:55:35,358 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 19:55:35,359 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 19:55:35,359 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 19:55:35,359 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 19:55:35,360 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 19:55:35,360 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 19:55:35,360 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 19:55:35,360 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 19:55:35,361 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 19:55:35,361 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 19:55:35,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 19:55:35,362 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 19:55:35,362 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 19:55:35,363 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 19:55:35,363 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 19:55:35,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 19:55:35,364 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 19:55:35,364 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 19:55:35,364 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 19:55:35,364 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 19:55:35,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 [2024-11-11 19:55:35,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 19:55:35,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 19:55:35,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 19:55:35,638 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 19:55:35,638 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 19:55:35,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard2.c [2024-11-11 19:55:37,123 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 19:55:37,305 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 19:55:37,306 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard2.c [2024-11-11 19:55:37,314 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccce11a69/b3e31224a629433c83eb6964c210a762/FLAGe3b5ed3d3 [2024-11-11 19:55:37,331 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccce11a69/b3e31224a629433c83eb6964c210a762 [2024-11-11 19:55:37,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 19:55:37,336 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 19:55:37,338 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 19:55:37,339 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 19:55:37,345 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 19:55:37,345 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 07:55:37" (1/1) ... [2024-11-11 19:55:37,346 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30c13651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37, skipping insertion in model container [2024-11-11 19:55:37,347 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 07:55:37" (1/1) ... [2024-11-11 19:55:37,371 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 19:55:37,563 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/hard2.c[526,539] [2024-11-11 19:55:37,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 19:55:37,594 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 19:55:37,607 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/hard2.c[526,539] [2024-11-11 19:55:37,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 19:55:37,638 INFO L204 MainTranslator]: Completed translation [2024-11-11 19:55:37,639 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37 WrapperNode [2024-11-11 19:55:37,639 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 19:55:37,640 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 19:55:37,641 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 19:55:37,641 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 19:55:37,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37" (1/1) ... [2024-11-11 19:55:37,655 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37" (1/1) ... [2024-11-11 19:55:37,676 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2024-11-11 19:55:37,677 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 19:55:37,678 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 19:55:37,678 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 19:55:37,678 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 19:55:37,688 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37" (1/1) ... [2024-11-11 19:55:37,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37" (1/1) ... [2024-11-11 19:55:37,690 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37" (1/1) ... [2024-11-11 19:55:37,700 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-11-11 19:55:37,701 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37" (1/1) ... [2024-11-11 19:55:37,701 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37" (1/1) ... [2024-11-11 19:55:37,703 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37" (1/1) ... [2024-11-11 19:55:37,706 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37" (1/1) ... [2024-11-11 19:55:37,708 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37" (1/1) ... [2024-11-11 19:55:37,709 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37" (1/1) ... [2024-11-11 19:55:37,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 19:55:37,715 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 19:55:37,715 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 19:55:37,716 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 19:55:37,716 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37" (1/1) ... [2024-11-11 19:55:37,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 19:55:37,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:55:37,749 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 19:55:37,752 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 19:55:37,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 19:55:37,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 19:55:37,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-11 19:55:37,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 19:55:37,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 19:55:37,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-11 19:55:37,798 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-11 19:55:37,863 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 19:55:37,867 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 19:55:38,040 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-11 19:55:38,040 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 19:55:38,059 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 19:55:38,059 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-11 19:55:38,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 07:55:38 BoogieIcfgContainer [2024-11-11 19:55:38,060 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 19:55:38,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 19:55:38,064 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 19:55:38,067 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 19:55:38,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 07:55:37" (1/3) ... [2024-11-11 19:55:38,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702ccd40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 07:55:38, skipping insertion in model container [2024-11-11 19:55:38,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:55:37" (2/3) ... [2024-11-11 19:55:38,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702ccd40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 07:55:38, skipping insertion in model container [2024-11-11 19:55:38,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 07:55:38" (3/3) ... [2024-11-11 19:55:38,071 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2.c [2024-11-11 19:55:38,087 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 19:55:38,088 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 19:55:38,152 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 19:55:38,163 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;@1d88befc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 19:55:38,163 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 19:55:38,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 19:55:38,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-11 19:55:38,173 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:55:38,174 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:55:38,175 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:55:38,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:55:38,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1812186719, now seen corresponding path program 1 times [2024-11-11 19:55:38,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:55:38,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044438729] [2024-11-11 19:55:38,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:38,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:55:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:55:38,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:55:38,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044438729] [2024-11-11 19:55:38,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044438729] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:55:38,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:55:38,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 19:55:38,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107657664] [2024-11-11 19:55:38,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:55:38,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 19:55:38,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:55:38,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 19:55:38,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 19:55:38,518 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:55:38,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:55:38,611 INFO L93 Difference]: Finished difference Result 59 states and 104 transitions. [2024-11-11 19:55:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 19:55:38,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-11 19:55:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:55:38,622 INFO L225 Difference]: With dead ends: 59 [2024-11-11 19:55:38,622 INFO L226 Difference]: Without dead ends: 31 [2024-11-11 19:55:38,626 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 19:55:38,628 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 98 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 19:55:38,629 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 98 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:55:38,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-11 19:55:38,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2024-11-11 19:55:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-11 19:55:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-11-11 19:55:38,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 7 [2024-11-11 19:55:38,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:55:38,662 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-11-11 19:55:38,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:55:38,662 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-11-11 19:55:38,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-11 19:55:38,663 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:55:38,663 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:55:38,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 19:55:38,663 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:55:38,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:55:38,664 INFO L85 PathProgramCache]: Analyzing trace with hash 876512919, now seen corresponding path program 1 times [2024-11-11 19:55:38,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:55:38,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024394476] [2024-11-11 19:55:38,664 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:38,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:55:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:38,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 19:55:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:55:38,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:55:38,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024394476] [2024-11-11 19:55:38,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024394476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:55:38,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:55:38,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 19:55:38,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018066738] [2024-11-11 19:55:38,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:55:38,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 19:55:38,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:55:38,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 19:55:38,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 19:55:38,820 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 19:55:38,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:55:38,881 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2024-11-11 19:55:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 19:55:38,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-11-11 19:55:38,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:55:38,883 INFO L225 Difference]: With dead ends: 37 [2024-11-11 19:55:38,883 INFO L226 Difference]: Without dead ends: 35 [2024-11-11 19:55:38,883 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 19:55:38,884 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:55:38,885 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 80 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:55:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-11 19:55:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2024-11-11 19:55:38,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 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 19:55:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-11-11 19:55:38,894 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 12 [2024-11-11 19:55:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:55:38,894 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-11-11 19:55:38,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 19:55:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-11-11 19:55:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-11 19:55:38,895 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:55:38,895 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:55:38,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-11 19:55:38,895 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:55:38,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:55:38,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2107096801, now seen corresponding path program 1 times [2024-11-11 19:55:38,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:55:38,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658283943] [2024-11-11 19:55:38,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:38,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:55:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 19:55:38,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413749196] [2024-11-11 19:55:38,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:38,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:55:38,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:55:38,928 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 19:55:38,930 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 19:55:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:38,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-11 19:55:39,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:55:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 19:55:39,122 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 19:55:39,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:55:39,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658283943] [2024-11-11 19:55:39,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 19:55:39,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413749196] [2024-11-11 19:55:39,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413749196] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:55:39,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:55:39,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 19:55:39,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840010665] [2024-11-11 19:55:39,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:55:39,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 19:55:39,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:55:39,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 19:55:39,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 19:55:39,125 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 19:55:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:55:39,193 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2024-11-11 19:55:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 19:55:39,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-11-11 19:55:39,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:55:39,194 INFO L225 Difference]: With dead ends: 54 [2024-11-11 19:55:39,195 INFO L226 Difference]: Without dead ends: 41 [2024-11-11 19:55:39,195 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-11 19:55:39,197 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:55:39,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 82 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:55:39,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-11 19:55:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-11 19:55:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-11 19:55:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2024-11-11 19:55:39,209 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 17 [2024-11-11 19:55:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:55:39,209 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2024-11-11 19:55:39,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 19:55:39,210 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2024-11-11 19:55:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-11 19:55:39,210 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:55:39,211 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:55:39,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-11 19:55:39,415 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 [2024-11-11 19:55:39,416 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:55:39,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:55:39,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2032872060, now seen corresponding path program 1 times [2024-11-11 19:55:39,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:55:39,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862407] [2024-11-11 19:55:39,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:39,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:55:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 19:55:39,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803355222] [2024-11-11 19:55:39,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:39,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:55:39,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:55:39,451 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 19:55:39,453 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 19:55:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:39,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-11 19:55:39,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:55:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 19:55:39,621 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:55:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 19:55:39,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:55:39,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862407] [2024-11-11 19:55:39,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 19:55:39,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803355222] [2024-11-11 19:55:39,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803355222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:55:39,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 19:55:39,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-11 19:55:39,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941042886] [2024-11-11 19:55:39,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 19:55:39,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-11 19:55:39,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:55:39,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-11 19:55:39,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-11 19:55:39,873 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-11 19:55:39,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:55:39,997 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2024-11-11 19:55:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 19:55:39,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2024-11-11 19:55:39,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:55:40,000 INFO L225 Difference]: With dead ends: 54 [2024-11-11 19:55:40,000 INFO L226 Difference]: Without dead ends: 52 [2024-11-11 19:55:40,001 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-11 19:55:40,002 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:55:40,002 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 19:55:40,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-11 19:55:40,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-11-11 19:55:40,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-11 19:55:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2024-11-11 19:55:40,023 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 24 [2024-11-11 19:55:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:55:40,024 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2024-11-11 19:55:40,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-11 19:55:40,024 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2024-11-11 19:55:40,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-11 19:55:40,026 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:55:40,026 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-11 19:55:40,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-11 19:55:40,230 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 [2024-11-11 19:55:40,231 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:55:40,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:55:40,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1003977419, now seen corresponding path program 1 times [2024-11-11 19:55:40,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:55:40,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172798575] [2024-11-11 19:55:40,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:40,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:55:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 19:55:40,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981194312] [2024-11-11 19:55:40,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:40,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:55:40,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:55:40,266 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 19:55:40,270 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 19:55:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:40,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-11 19:55:40,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:55:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-11 19:55:40,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:55:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-11 19:55:40,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:55:40,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172798575] [2024-11-11 19:55:40,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 19:55:40,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981194312] [2024-11-11 19:55:40,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981194312] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-11 19:55:40,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 19:55:40,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-11 19:55:40,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359273076] [2024-11-11 19:55:40,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:55:40,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 19:55:40,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:55:40,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 19:55:40,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-11 19:55:40,543 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 19:55:42,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-11 19:55:42,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:55:42,254 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2024-11-11 19:55:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 19:55:42,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2024-11-11 19:55:42,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:55:42,259 INFO L225 Difference]: With dead ends: 61 [2024-11-11 19:55:42,259 INFO L226 Difference]: Without dead ends: 59 [2024-11-11 19:55:42,260 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-11 19:55:42,260 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-11 19:55:42,261 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-11 19:55:42,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-11 19:55:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-11-11 19:55:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 37 states have internal predecessors, (41), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-11 19:55:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2024-11-11 19:55:42,274 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 34 [2024-11-11 19:55:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:55:42,276 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2024-11-11 19:55:42,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 19:55:42,276 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2024-11-11 19:55:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-11 19:55:42,277 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:55:42,277 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:55:42,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-11 19:55:42,478 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 [2024-11-11 19:55:42,478 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:55:42,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:55:42,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1268445597, now seen corresponding path program 1 times [2024-11-11 19:55:42,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:55:42,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716203886] [2024-11-11 19:55:42,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:42,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:55:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:42,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 19:55:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:42,629 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 19:55:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:42,636 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 19:55:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:42,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-11 19:55:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:42,649 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 19:55:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:42,660 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-11 19:55:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-11 19:55:42,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:55:42,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716203886] [2024-11-11 19:55:42,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716203886] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:55:42,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:55:42,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 19:55:42,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511764912] [2024-11-11 19:55:42,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:55:42,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 19:55:42,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:55:42,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 19:55:42,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 19:55:42,673 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-11 19:55:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:55:42,724 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2024-11-11 19:55:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 19:55:42,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2024-11-11 19:55:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:55:42,726 INFO L225 Difference]: With dead ends: 66 [2024-11-11 19:55:42,727 INFO L226 Difference]: Without dead ends: 54 [2024-11-11 19:55:42,728 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 19:55:42,729 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:55:42,730 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 92 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:55:42,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-11 19:55:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-11 19:55:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-11 19:55:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2024-11-11 19:55:42,746 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 40 [2024-11-11 19:55:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:55:42,746 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2024-11-11 19:55:42,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-11 19:55:42,747 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2024-11-11 19:55:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-11 19:55:42,750 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:55:42,750 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:55:42,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-11 19:55:42,750 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:55:42,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:55:42,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1409666923, now seen corresponding path program 1 times [2024-11-11 19:55:42,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:55:42,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448617388] [2024-11-11 19:55:42,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:42,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:55:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 19:55:42,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369853238] [2024-11-11 19:55:42,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:42,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:55:42,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:55:42,803 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 19:55:42,804 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 19:55:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:42,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-11 19:55:42,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:55:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-11 19:55:43,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:55:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-11 19:55:44,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:55:44,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448617388] [2024-11-11 19:55:44,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 19:55:44,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369853238] [2024-11-11 19:55:44,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369853238] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:55:44,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 19:55:44,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-11 19:55:44,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280359801] [2024-11-11 19:55:44,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 19:55:44,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-11 19:55:44,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:55:44,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-11 19:55:44,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-11 19:55:44,602 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-11 19:55:45,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:55:45,239 INFO L93 Difference]: Finished difference Result 129 states and 174 transitions. [2024-11-11 19:55:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-11 19:55:45,240 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 54 [2024-11-11 19:55:45,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:55:45,241 INFO L225 Difference]: With dead ends: 129 [2024-11-11 19:55:45,241 INFO L226 Difference]: Without dead ends: 106 [2024-11-11 19:55:45,242 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-11 19:55:45,243 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-11 19:55:45,243 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 164 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-11 19:55:45,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-11 19:55:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2024-11-11 19:55:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 67 states have internal predecessors, (76), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-11 19:55:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 137 transitions. [2024-11-11 19:55:45,274 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 137 transitions. Word has length 54 [2024-11-11 19:55:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:55:45,275 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 137 transitions. [2024-11-11 19:55:45,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-11 19:55:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 137 transitions. [2024-11-11 19:55:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-11 19:55:45,276 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:55:45,277 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:55:45,296 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 19:55:45,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:55:45,478 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:55:45,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:55:45,481 INFO L85 PathProgramCache]: Analyzing trace with hash 135028242, now seen corresponding path program 1 times [2024-11-11 19:55:45,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:55:45,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843193371] [2024-11-11 19:55:45,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:45,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:55:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 19:55:45,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460874910] [2024-11-11 19:55:45,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:45,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:55:45,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:55:45,521 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 19:55:45,522 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 19:55:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:45,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-11 19:55:45,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:55:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-11 19:55:45,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:55:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-11 19:55:46,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:55:46,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843193371] [2024-11-11 19:55:46,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 19:55:46,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460874910] [2024-11-11 19:55:46,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460874910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:55:46,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 19:55:46,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-11-11 19:55:46,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872859590] [2024-11-11 19:55:46,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 19:55:46,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-11 19:55:46,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:55:46,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-11 19:55:46,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-11-11 19:55:46,383 INFO L87 Difference]: Start difference. First operand 104 states and 137 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-11 19:55:47,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:55:47,094 INFO L93 Difference]: Finished difference Result 159 states and 212 transitions. [2024-11-11 19:55:47,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-11 19:55:47,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 65 [2024-11-11 19:55:47,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:55:47,101 INFO L225 Difference]: With dead ends: 159 [2024-11-11 19:55:47,101 INFO L226 Difference]: Without dead ends: 127 [2024-11-11 19:55:47,101 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-11-11 19:55:47,103 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-11 19:55:47,104 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 165 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-11 19:55:47,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-11 19:55:47,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2024-11-11 19:55:47,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.180327868852459) internal successors, (72), 66 states have internal predecessors, (72), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-11 19:55:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2024-11-11 19:55:47,156 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 65 [2024-11-11 19:55:47,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:55:47,157 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2024-11-11 19:55:47,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-11 19:55:47,157 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2024-11-11 19:55:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-11 19:55:47,158 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:55:47,158 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:55:47,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-11 19:55:47,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:55:47,359 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:55:47,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:55:47,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1157546620, now seen corresponding path program 1 times [2024-11-11 19:55:47,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:55:47,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102503096] [2024-11-11 19:55:47,360 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:47,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:55:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:47,684 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 19:55:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:47,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 19:55:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:47,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 19:55:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:47,697 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-11 19:55:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:47,703 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 19:55:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:47,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-11 19:55:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:47,717 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-11 19:55:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:47,722 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-11 19:55:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:47,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-11 19:55:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:47,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-11-11 19:55:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:47,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-11 19:55:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-11 19:55:47,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:55:47,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102503096] [2024-11-11 19:55:47,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102503096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:55:47,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567023032] [2024-11-11 19:55:47,753 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:47,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:55:47,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:55:47,755 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 19:55:47,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 19:55:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:55:47,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-11 19:55:47,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:55:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-11 19:55:47,996 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:55:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-11 19:55:48,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567023032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:55:48,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:55:48,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-11 19:55:48,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132975979] [2024-11-11 19:55:48,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:55:48,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-11 19:55:48,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:55:48,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-11 19:55:48,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-11 19:55:48,376 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-11 19:55:48,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:55:48,612 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2024-11-11 19:55:48,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-11 19:55:48,612 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 70 [2024-11-11 19:55:48,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:55:48,614 INFO L225 Difference]: With dead ends: 140 [2024-11-11 19:55:48,614 INFO L226 Difference]: Without dead ends: 91 [2024-11-11 19:55:48,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-11 19:55:48,615 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:55:48,616 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 236 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 19:55:48,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-11 19:55:48,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-11 19:55:48,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 56 states have (on average 1.125) internal successors, (63), 59 states have internal predecessors, (63), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-11 19:55:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2024-11-11 19:55:48,644 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 70 [2024-11-11 19:55:48,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:55:48,644 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2024-11-11 19:55:48,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-11 19:55:48,644 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2024-11-11 19:55:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-11 19:55:48,646 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:55:48,646 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-11 19:55:48,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-11 19:55:48,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:55:48,847 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:55:48,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:55:48,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2022890084, now seen corresponding path program 2 times [2024-11-11 19:55:48,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:55:48,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101313117] [2024-11-11 19:55:48,847 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:55:48,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:55:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 19:55:48,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744861545] [2024-11-11 19:55:48,879 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 19:55:48,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:55:48,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:55:48,881 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 19:55:48,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-11 19:55:48,943 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 19:55:48,943 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:55:48,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-11 19:55:48,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:55:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-11 19:55:49,464 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:56:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-11 19:56:05,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:56:05,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101313117] [2024-11-11 19:56:05,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 19:56:05,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744861545] [2024-11-11 19:56:05,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744861545] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:56:05,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 19:56:05,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2024-11-11 19:56:05,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005090994] [2024-11-11 19:56:05,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 19:56:05,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-11 19:56:05,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:56:05,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-11 19:56:05,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-11-11 19:56:05,389 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2024-11-11 19:56:17,388 WARN L286 SmtUtils]: Spent 8.61s on a formula simplification. DAG size of input: 222 DAG size of output: 125 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-11 19:56:17,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:56:17,696 INFO L93 Difference]: Finished difference Result 204 states and 266 transitions. [2024-11-11 19:56:17,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-11 19:56:17,696 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 84 [2024-11-11 19:56:17,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:56:17,698 INFO L225 Difference]: With dead ends: 204 [2024-11-11 19:56:17,698 INFO L226 Difference]: Without dead ends: 171 [2024-11-11 19:56:17,702 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2024-11-11 19:56:17,703 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 49 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:56:17,703 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 356 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-11 19:56:17,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-11 19:56:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 151. [2024-11-11 19:56:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 97 states have internal predecessors, (108), 41 states have call successors, (41), 16 states have call predecessors, (41), 16 states have return successors, (40), 37 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-11 19:56:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 189 transitions. [2024-11-11 19:56:17,762 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 189 transitions. Word has length 84 [2024-11-11 19:56:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:56:17,763 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 189 transitions. [2024-11-11 19:56:17,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2024-11-11 19:56:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 189 transitions. [2024-11-11 19:56:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-11 19:56:17,766 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:56:17,766 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-11 19:56:17,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-11 19:56:17,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:56:17,967 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:56:17,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:56:17,968 INFO L85 PathProgramCache]: Analyzing trace with hash -757369614, now seen corresponding path program 3 times [2024-11-11 19:56:17,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:56:17,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599202280] [2024-11-11 19:56:17,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:56:17,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:56:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 19:56:18,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746685128] [2024-11-11 19:56:18,007 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 19:56:18,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:56:18,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:56:18,009 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 19:56:18,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-11 19:56:18,067 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-11 19:56:18,067 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:56:18,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-11 19:56:18,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:56:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 79 proven. 39 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-11 19:56:18,198 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:56:19,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:56:19,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599202280] [2024-11-11 19:56:19,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 19:56:19,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746685128] [2024-11-11 19:56:19,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746685128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:56:19,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 19:56:19,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-11 19:56:19,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764397452] [2024-11-11 19:56:19,344 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 19:56:19,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-11 19:56:19,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:56:19,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-11 19:56:19,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-11 19:56:19,346 INFO L87 Difference]: Start difference. First operand 151 states and 189 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-11 19:56:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:56:19,506 INFO L93 Difference]: Finished difference Result 170 states and 204 transitions. [2024-11-11 19:56:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-11 19:56:19,506 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 89 [2024-11-11 19:56:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:56:19,508 INFO L225 Difference]: With dead ends: 170 [2024-11-11 19:56:19,508 INFO L226 Difference]: Without dead ends: 168 [2024-11-11 19:56:19,508 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-11 19:56:19,509 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:56:19,509 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 66 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 19:56:19,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-11 19:56:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2024-11-11 19:56:19,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 109 states have internal predecessors, (120), 41 states have call successors, (41), 20 states have call predecessors, (41), 20 states have return successors, (40), 37 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-11 19:56:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 201 transitions. [2024-11-11 19:56:19,551 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 201 transitions. Word has length 89 [2024-11-11 19:56:19,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:56:19,551 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 201 transitions. [2024-11-11 19:56:19,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-11 19:56:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 201 transitions. [2024-11-11 19:56:19,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-11 19:56:19,553 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:56:19,553 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:56:19,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-11 19:56:19,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-11 19:56:19,754 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:56:19,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:56:19,755 INFO L85 PathProgramCache]: Analyzing trace with hash -442569351, now seen corresponding path program 2 times [2024-11-11 19:56:19,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:56:19,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325904267] [2024-11-11 19:56:19,755 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:56:19,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:56:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 19:56:19,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186421191] [2024-11-11 19:56:19,791 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 19:56:19,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:56:19,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:56:19,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 19:56:19,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-11 19:56:19,863 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 19:56:19,864 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:56:19,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-11 19:56:19,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:56:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-11 19:56:20,252 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:56:20,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:56:20,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325904267] [2024-11-11 19:56:20,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 19:56:20,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186421191] [2024-11-11 19:56:20,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186421191] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:56:20,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 19:56:20,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-11 19:56:20,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866941732] [2024-11-11 19:56:20,485 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 19:56:20,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-11 19:56:20,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:56:20,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-11 19:56:20,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-11-11 19:56:20,486 INFO L87 Difference]: Start difference. First operand 167 states and 201 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-11 19:56:20,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:56:20,868 INFO L93 Difference]: Finished difference Result 221 states and 258 transitions. [2024-11-11 19:56:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-11 19:56:20,868 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 95 [2024-11-11 19:56:20,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:56:20,870 INFO L225 Difference]: With dead ends: 221 [2024-11-11 19:56:20,870 INFO L226 Difference]: Without dead ends: 163 [2024-11-11 19:56:20,870 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-11-11 19:56:20,871 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-11 19:56:20,871 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 348 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-11 19:56:20,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-11 19:56:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2024-11-11 19:56:20,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 99 states have (on average 1.121212121212121) internal successors, (111), 103 states have internal predecessors, (111), 37 states have call successors, (37), 20 states have call predecessors, (37), 20 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-11 19:56:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 184 transitions. [2024-11-11 19:56:20,917 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 184 transitions. Word has length 95 [2024-11-11 19:56:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:56:20,918 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 184 transitions. [2024-11-11 19:56:20,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-11 19:56:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 184 transitions. [2024-11-11 19:56:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-11 19:56:20,919 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:56:20,919 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:56:20,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-11 19:56:21,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:56:21,124 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:56:21,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:56:21,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2030917253, now seen corresponding path program 1 times [2024-11-11 19:56:21,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:56:21,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191575354] [2024-11-11 19:56:21,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:56:21,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:56:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 19:56:21,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532434843] [2024-11-11 19:56:21,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:56:21,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:56:21,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:56:21,150 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 19:56:21,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-11 19:56:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:21,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-11 19:56:21,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:56:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-11 19:56:21,602 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:56:22,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:56:22,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191575354] [2024-11-11 19:56:22,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 19:56:22,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532434843] [2024-11-11 19:56:22,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532434843] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:56:22,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 19:56:22,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-11-11 19:56:22,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51275456] [2024-11-11 19:56:22,293 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 19:56:22,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-11 19:56:22,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:56:22,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-11 19:56:22,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2024-11-11 19:56:22,294 INFO L87 Difference]: Start difference. First operand 157 states and 184 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-11 19:56:22,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:56:22,515 INFO L93 Difference]: Finished difference Result 165 states and 192 transitions. [2024-11-11 19:56:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-11 19:56:22,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 95 [2024-11-11 19:56:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:56:22,517 INFO L225 Difference]: With dead ends: 165 [2024-11-11 19:56:22,517 INFO L226 Difference]: Without dead ends: 163 [2024-11-11 19:56:22,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2024-11-11 19:56:22,518 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 19:56:22,518 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 246 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 19:56:22,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-11 19:56:22,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2024-11-11 19:56:22,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 99 states have (on average 1.121212121212121) internal successors, (111), 103 states have internal predecessors, (111), 37 states have call successors, (37), 20 states have call predecessors, (37), 20 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-11 19:56:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 184 transitions. [2024-11-11 19:56:22,554 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 184 transitions. Word has length 95 [2024-11-11 19:56:22,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:56:22,555 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 184 transitions. [2024-11-11 19:56:22,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-11 19:56:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 184 transitions. [2024-11-11 19:56:22,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-11 19:56:22,556 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:56:22,556 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:56:22,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-11 19:56:22,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-11 19:56:22,761 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:56:22,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:56:22,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1030960765, now seen corresponding path program 2 times [2024-11-11 19:56:22,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:56:22,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971077427] [2024-11-11 19:56:22,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:56:22,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:56:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,125 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 19:56:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 19:56:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 19:56:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,137 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-11 19:56:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,141 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 19:56:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-11 19:56:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,149 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-11 19:56:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,153 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-11 19:56:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,157 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-11 19:56:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,160 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-11 19:56:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-11 19:56:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-11 19:56:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,171 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-11-11 19:56:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,174 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-11-11 19:56:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,177 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-11-11 19:56:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,181 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-11-11 19:56:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:56:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-11 19:56:23,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:56:23,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971077427] [2024-11-11 19:56:23,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971077427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:56:23,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376629012] [2024-11-11 19:56:23,187 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 19:56:23,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:56:23,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:56:23,189 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 19:56:23,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-11 19:56:23,252 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 19:56:23,252 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:56:23,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-11 19:56:23,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:56:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-11 19:56:23,454 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:56:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-11 19:56:24,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376629012] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:56:24,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:56:24,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 21 [2024-11-11 19:56:24,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263423761] [2024-11-11 19:56:24,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:56:24,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-11 19:56:24,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:56:24,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-11 19:56:24,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-11-11 19:56:24,446 INFO L87 Difference]: Start difference. First operand 157 states and 184 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 13 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2024-11-11 19:56:24,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:56:24,756 INFO L93 Difference]: Finished difference Result 201 states and 231 transitions. [2024-11-11 19:56:24,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-11 19:56:24,756 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 13 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) Word has length 100 [2024-11-11 19:56:24,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:56:24,757 INFO L225 Difference]: With dead ends: 201 [2024-11-11 19:56:24,757 INFO L226 Difference]: Without dead ends: 128 [2024-11-11 19:56:24,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2024-11-11 19:56:24,758 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 19:56:24,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 192 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 19:56:24,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-11 19:56:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 117. [2024-11-11 19:56:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 75 states have (on average 1.08) internal successors, (81), 78 states have internal predecessors, (81), 24 states have call successors, (24), 17 states have call predecessors, (24), 17 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-11 19:56:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2024-11-11 19:56:24,789 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 100 [2024-11-11 19:56:24,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:56:24,789 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2024-11-11 19:56:24,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 13 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2024-11-11 19:56:24,789 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2024-11-11 19:56:24,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-11 19:56:24,790 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:56:24,790 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-11 19:56:24,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-11 19:56:24,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-11 19:56:24,991 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:56:24,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:56:24,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2024814962, now seen corresponding path program 4 times [2024-11-11 19:56:24,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:56:24,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331603850] [2024-11-11 19:56:24,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:56:24,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:56:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 19:56:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316527518] [2024-11-11 19:56:25,014 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 19:56:25,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:56:25,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:56:25,016 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 19:56:25,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-11 19:56:25,102 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 19:56:25,102 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:56:25,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-11 19:56:25,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:57:07,716 WARN L286 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 33 DAG size of output: 28 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)