./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/MultCommutative-2.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/recursive/MultCommutative-2.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 ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 20:56:57,714 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 20:56:57,784 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 20:56:57,789 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 20:56:57,790 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 20:56:57,833 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 20:56:57,834 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 20:56:57,834 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 20:56:57,835 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 20:56:57,839 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 20:56:57,839 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 20:56:57,840 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 20:56:57,840 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 20:56:57,840 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 20:56:57,841 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 20:56:57,841 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 20:56:57,841 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 20:56:57,843 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 20:56:57,843 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 20:56:57,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 20:56:57,844 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 20:56:57,844 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 20:56:57,845 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 20:56:57,845 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 20:56:57,845 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 20:56:57,845 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 20:56:57,845 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 20:56:57,846 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 20:56:57,846 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 20:56:57,846 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 20:56:57,846 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 20:56:57,847 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 20:56:57,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:56:57,847 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 20:56:57,847 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 20:56:57,847 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 20:56:57,847 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 20:56:57,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 20:56:57,848 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 20:56:57,850 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 20:56:57,850 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 20:56:57,850 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 20:56:57,851 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2024-11-11 20:56:58,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 20:56:58,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 20:56:58,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 20:56:58,126 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 20:56:58,126 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 20:56:58,128 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/MultCommutative-2.c [2024-11-11 20:56:59,652 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 20:56:59,865 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 20:56:59,867 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c [2024-11-11 20:56:59,877 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/992699a4a/a4a97b3edf4e4a18974626fa223c4e11/FLAG51bc23949 [2024-11-11 20:56:59,894 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/992699a4a/a4a97b3edf4e4a18974626fa223c4e11 [2024-11-11 20:56:59,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 20:56:59,899 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 20:56:59,901 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 20:56:59,902 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 20:56:59,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 20:56:59,910 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:56:59" (1/1) ... [2024-11-11 20:56:59,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f111c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:56:59, skipping insertion in model container [2024-11-11 20:56:59,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:56:59" (1/1) ... [2024-11-11 20:56:59,933 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 20:57:00,145 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/recursive/MultCommutative-2.c[970,983] [2024-11-11 20:57:00,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:57:00,162 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 20:57:00,181 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/recursive/MultCommutative-2.c[970,983] [2024-11-11 20:57:00,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:57:00,206 INFO L204 MainTranslator]: Completed translation [2024-11-11 20:57:00,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:57:00 WrapperNode [2024-11-11 20:57:00,207 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 20:57:00,208 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 20:57:00,208 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 20:57:00,209 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 20:57:00,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:57:00" (1/1) ... [2024-11-11 20:57:00,223 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:57:00" (1/1) ... [2024-11-11 20:57:00,242 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2024-11-11 20:57:00,242 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 20:57:00,243 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 20:57:00,243 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 20:57:00,243 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 20:57:00,254 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:57:00" (1/1) ... [2024-11-11 20:57:00,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:57:00" (1/1) ... [2024-11-11 20:57:00,256 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:57:00" (1/1) ... [2024-11-11 20:57:00,274 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-11 20:57:00,274 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:57:00" (1/1) ... [2024-11-11 20:57:00,275 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:57:00" (1/1) ... [2024-11-11 20:57:00,277 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:57:00" (1/1) ... [2024-11-11 20:57:00,283 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:57:00" (1/1) ... [2024-11-11 20:57:00,286 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:57:00" (1/1) ... [2024-11-11 20:57:00,287 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:57:00" (1/1) ... [2024-11-11 20:57:00,289 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 20:57:00,294 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 20:57:00,294 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 20:57:00,294 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 20:57:00,295 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:57:00" (1/1) ... [2024-11-11 20:57:00,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:57:00,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:57:00,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-11 20:57:00,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-11 20:57:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 20:57:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2024-11-11 20:57:00,392 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2024-11-11 20:57:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 20:57:00,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 20:57:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 20:57:00,461 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 20:57:00,463 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 20:57:00,631 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-11 20:57:00,632 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 20:57:00,645 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 20:57:00,647 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-11 20:57:00,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:57:00 BoogieIcfgContainer [2024-11-11 20:57:00,648 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 20:57:00,651 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 20:57:00,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 20:57:00,656 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 20:57:00,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 08:56:59" (1/3) ... [2024-11-11 20:57:00,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21259e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:57:00, skipping insertion in model container [2024-11-11 20:57:00,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:57:00" (2/3) ... [2024-11-11 20:57:00,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21259e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:57:00, skipping insertion in model container [2024-11-11 20:57:00,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:57:00" (3/3) ... [2024-11-11 20:57:00,660 INFO L112 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2024-11-11 20:57:00,680 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 20:57:00,680 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 20:57:00,736 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 20:57:00,742 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;@8fb8192, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 20:57:00,743 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 20:57:00,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 20:57:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-11 20:57:00,753 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:00,753 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:00,754 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:00,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:00,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1513944532, now seen corresponding path program 1 times [2024-11-11 20:57:00,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:00,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880066806] [2024-11-11 20:57:00,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:00,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:01,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:01,162 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 20:57:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 20:57:01,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:01,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880066806] [2024-11-11 20:57:01,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880066806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:57:01,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:57:01,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-11 20:57:01,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661117087] [2024-11-11 20:57:01,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:57:01,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-11 20:57:01,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:01,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-11 20:57:01,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-11 20:57:01,289 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 20:57:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:01,416 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2024-11-11 20:57:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 20:57:01,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-11-11 20:57:01,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:01,427 INFO L225 Difference]: With dead ends: 36 [2024-11-11 20:57:01,427 INFO L226 Difference]: Without dead ends: 26 [2024-11-11 20:57:01,430 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-11 20:57:01,436 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:01,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 138 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:57:01,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-11 20:57:01,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-11-11 20:57:01,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-11 20:57:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2024-11-11 20:57:01,534 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 20 [2024-11-11 20:57:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:01,535 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2024-11-11 20:57:01,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 20:57:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2024-11-11 20:57:01,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-11 20:57:01,537 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:01,537 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:01,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 20:57:01,538 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:01,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:01,539 INFO L85 PathProgramCache]: Analyzing trace with hash 555960324, now seen corresponding path program 1 times [2024-11-11 20:57:01,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:01,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358640938] [2024-11-11 20:57:01,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:01,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:01,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:01,752 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 20:57:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:01,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:57:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 20:57:01,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:01,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358640938] [2024-11-11 20:57:01,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358640938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:57:01,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580816455] [2024-11-11 20:57:01,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:01,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:01,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:57:01,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:57:01,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 20:57:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:01,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-11 20:57:01,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:57:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 20:57:02,043 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:57:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 20:57:02,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580816455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:57:02,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:57:02,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2024-11-11 20:57:02,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725971320] [2024-11-11 20:57:02,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:57:02,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-11 20:57:02,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:02,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-11 20:57:02,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-11 20:57:02,174 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-11 20:57:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:02,423 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2024-11-11 20:57:02,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-11 20:57:02,424 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 26 [2024-11-11 20:57:02,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:02,425 INFO L225 Difference]: With dead ends: 52 [2024-11-11 20:57:02,426 INFO L226 Difference]: Without dead ends: 27 [2024-11-11 20:57:02,426 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-11 20:57:02,429 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:02,431 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 144 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 20:57:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-11 20:57:02,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2024-11-11 20:57:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-11 20:57:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-11-11 20:57:02,446 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 26 [2024-11-11 20:57:02,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:02,446 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-11-11 20:57:02,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-11 20:57:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-11-11 20:57:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-11 20:57:02,448 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:02,448 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:02,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-11 20:57:02,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:02,651 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:02,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:02,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2011031750, now seen corresponding path program 1 times [2024-11-11 20:57:02,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:02,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215293485] [2024-11-11 20:57:02,653 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:02,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:02,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:02,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:02,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:57:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 20:57:02,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:02,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215293485] [2024-11-11 20:57:02,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215293485] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:57:02,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:57:02,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 20:57:02,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395908189] [2024-11-11 20:57:02,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:57:02,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 20:57:02,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:02,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 20:57:02,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 20:57:02,768 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 20:57:02,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:02,829 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2024-11-11 20:57:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-11 20:57:02,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2024-11-11 20:57:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:02,831 INFO L225 Difference]: With dead ends: 31 [2024-11-11 20:57:02,832 INFO L226 Difference]: Without dead ends: 27 [2024-11-11 20:57:02,833 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-11 20:57:02,834 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:02,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 50 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:57:02,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-11 20:57:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-11 20:57:02,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-11 20:57:02,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-11-11 20:57:02,847 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 27 [2024-11-11 20:57:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:02,850 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-11-11 20:57:02,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 20:57:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-11-11 20:57:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-11 20:57:02,851 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:02,851 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:02,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-11 20:57:02,851 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:02,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:02,852 INFO L85 PathProgramCache]: Analyzing trace with hash -760266050, now seen corresponding path program 2 times [2024-11-11 20:57:02,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:02,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577160614] [2024-11-11 20:57:02,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:02,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:03,144 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:03,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:03,305 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:57:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:03,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-11 20:57:03,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:03,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577160614] [2024-11-11 20:57:03,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577160614] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:57:03,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803426379] [2024-11-11 20:57:03,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 20:57:03,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:03,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:57:03,499 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:57:03,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 20:57:03,553 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 20:57:03,553 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:57:03,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-11 20:57:03,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:57:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-11 20:57:03,895 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:57:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-11 20:57:04,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803426379] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:57:04,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:57:04,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 14] total 35 [2024-11-11 20:57:04,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474133135] [2024-11-11 20:57:04,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:57:04,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-11 20:57:04,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:04,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-11 20:57:04,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2024-11-11 20:57:04,981 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-11 20:57:05,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:05,465 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2024-11-11 20:57:05,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-11 20:57:05,465 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 34 [2024-11-11 20:57:05,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:05,469 INFO L225 Difference]: With dead ends: 38 [2024-11-11 20:57:05,469 INFO L226 Difference]: Without dead ends: 34 [2024-11-11 20:57:05,471 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2024-11-11 20:57:05,471 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:05,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 178 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-11 20:57:05,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-11 20:57:05,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-11-11 20:57:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-11-11 20:57:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-11-11 20:57:05,486 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 34 [2024-11-11 20:57:05,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:05,489 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-11-11 20:57:05,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-11 20:57:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-11-11 20:57:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-11 20:57:05,491 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:05,491 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:05,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 20:57:05,691 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 20:57:05,692 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:05,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:05,693 INFO L85 PathProgramCache]: Analyzing trace with hash -757286924, now seen corresponding path program 1 times [2024-11-11 20:57:05,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:05,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248841280] [2024-11-11 20:57:05,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:05,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:05,738 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:05,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:05,750 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:57:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:05,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:05,836 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:57:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:05,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-11 20:57:05,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:05,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248841280] [2024-11-11 20:57:05,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248841280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:57:05,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26174668] [2024-11-11 20:57:05,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:05,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:05,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:57:05,858 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:57:05,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 20:57:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:05,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-11 20:57:05,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:57:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-11 20:57:05,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:57:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-11 20:57:06,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26174668] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:57:06,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:57:06,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-11-11 20:57:06,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477696532] [2024-11-11 20:57:06,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:57:06,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-11 20:57:06,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:06,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-11 20:57:06,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-11 20:57:06,123 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-11 20:57:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:06,197 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2024-11-11 20:57:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 20:57:06,198 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 47 [2024-11-11 20:57:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:06,199 INFO L225 Difference]: With dead ends: 54 [2024-11-11 20:57:06,199 INFO L226 Difference]: Without dead ends: 25 [2024-11-11 20:57:06,200 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-11 20:57:06,201 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:06,201 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 82 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:57:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-11 20:57:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-11 20:57:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-11 20:57:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-11-11 20:57:06,211 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 47 [2024-11-11 20:57:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:06,212 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-11-11 20:57:06,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-11 20:57:06,213 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-11-11 20:57:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-11 20:57:06,215 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:06,215 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:06,232 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 20:57:06,417 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 20:57:06,418 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:06,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:06,418 INFO L85 PathProgramCache]: Analyzing trace with hash -983670890, now seen corresponding path program 3 times [2024-11-11 20:57:06,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:06,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793197141] [2024-11-11 20:57:06,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:06,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:06,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:06,682 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:06,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:57:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:06,801 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:06,867 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-11 20:57:06,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:06,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793197141] [2024-11-11 20:57:06,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793197141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:57:06,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312369934] [2024-11-11 20:57:06,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 20:57:06,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:06,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:57:06,923 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:57:06,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 20:57:06,976 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-11 20:57:06,976 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:57:06,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-11 20:57:06,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:57:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-11 20:57:07,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:57:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-11 20:57:07,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312369934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:57:07,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:57:07,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 18] total 39 [2024-11-11 20:57:07,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137461879] [2024-11-11 20:57:07,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:57:07,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-11 20:57:07,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:07,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-11 20:57:07,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2024-11-11 20:57:07,985 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 39 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 25 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 9 states have return successors, (14), 14 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-11 20:57:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:08,831 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2024-11-11 20:57:08,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-11 20:57:08,833 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 25 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 9 states have return successors, (14), 14 states have call predecessors, (14), 8 states have call successors, (14) Word has length 41 [2024-11-11 20:57:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:08,834 INFO L225 Difference]: With dead ends: 45 [2024-11-11 20:57:08,834 INFO L226 Difference]: Without dead ends: 37 [2024-11-11 20:57:08,836 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=326, Invalid=2866, Unknown=0, NotChecked=0, Total=3192 [2024-11-11 20:57:08,836 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:08,837 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 246 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-11 20:57:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-11 20:57:08,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2024-11-11 20:57:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-11 20:57:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-11-11 20:57:08,843 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 41 [2024-11-11 20:57:08,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:08,844 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-11-11 20:57:08,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 25 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 9 states have return successors, (14), 14 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-11 20:57:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-11-11 20:57:08,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-11 20:57:08,845 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:08,846 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:08,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 20:57:09,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:09,050 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:09,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:09,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1241549144, now seen corresponding path program 4 times [2024-11-11 20:57:09,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:09,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613217612] [2024-11-11 20:57:09,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:09,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:09,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:09,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:09,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:09,528 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 20:57:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:09,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:09,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:09,835 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-11 20:57:09,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:09,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613217612] [2024-11-11 20:57:09,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613217612] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:57:09,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618087576] [2024-11-11 20:57:09,874 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 20:57:09,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:09,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:57:09,876 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:57:09,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 20:57:09,931 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 20:57:09,932 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:57:09,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-11 20:57:09,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:57:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-11 20:57:10,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:57:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 80 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-11 20:57:11,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618087576] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:57:11,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:57:11,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 24] total 50 [2024-11-11 20:57:11,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949887357] [2024-11-11 20:57:11,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:57:11,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-11 20:57:11,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-11 20:57:11,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2268, Unknown=0, NotChecked=0, Total=2450 [2024-11-11 20:57:11,538 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 50 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 32 states have internal predecessors, (67), 11 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-11 20:57:12,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:12,672 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2024-11-11 20:57:12,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-11 20:57:12,673 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 32 states have internal predecessors, (67), 11 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) Word has length 55 [2024-11-11 20:57:12,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:12,674 INFO L225 Difference]: With dead ends: 57 [2024-11-11 20:57:12,674 INFO L226 Difference]: Without dead ends: 46 [2024-11-11 20:57:12,675 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=511, Invalid=4745, Unknown=0, NotChecked=0, Total=5256 [2024-11-11 20:57:12,676 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:12,676 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 302 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-11 20:57:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-11 20:57:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2024-11-11 20:57:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-11-11 20:57:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2024-11-11 20:57:12,685 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 55 [2024-11-11 20:57:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:12,685 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2024-11-11 20:57:12,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 32 states have internal predecessors, (67), 11 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-11 20:57:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2024-11-11 20:57:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-11 20:57:12,687 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:12,687 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:12,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-11 20:57:12,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:12,892 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:12,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1179471462, now seen corresponding path program 5 times [2024-11-11 20:57:12,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:12,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076286970] [2024-11-11 20:57:12,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:12,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:13,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:13,179 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:13,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:57:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:13,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:13,457 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:13,541 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:13,611 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 64 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-11 20:57:13,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:13,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076286970] [2024-11-11 20:57:13,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076286970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:57:13,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555930991] [2024-11-11 20:57:13,689 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-11 20:57:13,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:13,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:57:13,696 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 20:57:13,698 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 20:57:13,760 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-11 20:57:13,761 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:57:13,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-11 20:57:13,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:57:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-11 20:57:14,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:57:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 8 proven. 96 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-11 20:57:15,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555930991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:57:15,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:57:15,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 26] total 61 [2024-11-11 20:57:15,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959485924] [2024-11-11 20:57:15,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:57:15,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-11 20:57:15,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:15,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-11 20:57:15,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=3448, Unknown=0, NotChecked=0, Total=3660 [2024-11-11 20:57:15,862 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 61 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 40 states have internal predecessors, (84), 11 states have call successors, (11), 1 states have call predecessors, (11), 19 states have return successors, (21), 21 states have call predecessors, (21), 11 states have call successors, (21) [2024-11-11 20:57:17,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:17,236 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2024-11-11 20:57:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-11 20:57:17,237 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 40 states have internal predecessors, (84), 11 states have call successors, (11), 1 states have call predecessors, (11), 19 states have return successors, (21), 21 states have call predecessors, (21), 11 states have call successors, (21) Word has length 55 [2024-11-11 20:57:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:17,239 INFO L225 Difference]: With dead ends: 76 [2024-11-11 20:57:17,239 INFO L226 Difference]: Without dead ends: 70 [2024-11-11 20:57:17,243 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=643, Invalid=6839, Unknown=0, NotChecked=0, Total=7482 [2024-11-11 20:57:17,244 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:17,244 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 469 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-11 20:57:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-11 20:57:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2024-11-11 20:57:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 9 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (31), 14 states have call predecessors, (31), 9 states have call successors, (31) [2024-11-11 20:57:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2024-11-11 20:57:17,269 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 55 [2024-11-11 20:57:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:17,269 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2024-11-11 20:57:17,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 40 states have internal predecessors, (84), 11 states have call successors, (11), 1 states have call predecessors, (11), 19 states have return successors, (21), 21 states have call predecessors, (21), 11 states have call successors, (21) [2024-11-11 20:57:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2024-11-11 20:57:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-11 20:57:17,275 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:17,275 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:17,292 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 20:57:17,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:17,476 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:17,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:17,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1278690222, now seen corresponding path program 6 times [2024-11-11 20:57:17,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:17,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536446750] [2024-11-11 20:57:17,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:17,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:17,651 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:17,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:17,847 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:17,900 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:17,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-11 20:57:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:18,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-11 20:57:18,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:18,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536446750] [2024-11-11 20:57:18,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536446750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:57:18,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308874489] [2024-11-11 20:57:18,057 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-11 20:57:18,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:18,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:57:18,059 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 20:57:18,061 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 20:57:18,115 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-11 20:57:18,116 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:57:18,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-11 20:57:18,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:57:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-11 20:57:18,757 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:57:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 8 proven. 60 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-11 20:57:19,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308874489] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:57:19,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:57:19,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 22] total 50 [2024-11-11 20:57:19,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096203618] [2024-11-11 20:57:19,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:57:19,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-11 20:57:19,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:19,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-11 20:57:19,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2258, Unknown=0, NotChecked=0, Total=2450 [2024-11-11 20:57:19,901 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand has 50 states, 45 states have (on average 1.488888888888889) internal successors, (67), 34 states have internal predecessors, (67), 10 states have call successors, (10), 1 states have call predecessors, (10), 12 states have return successors, (18), 16 states have call predecessors, (18), 10 states have call successors, (18) [2024-11-11 20:57:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:20,854 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2024-11-11 20:57:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-11 20:57:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.488888888888889) internal successors, (67), 34 states have internal predecessors, (67), 10 states have call successors, (10), 1 states have call predecessors, (10), 12 states have return successors, (18), 16 states have call predecessors, (18), 10 states have call successors, (18) Word has length 48 [2024-11-11 20:57:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:20,857 INFO L225 Difference]: With dead ends: 81 [2024-11-11 20:57:20,857 INFO L226 Difference]: Without dead ends: 71 [2024-11-11 20:57:20,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=522, Invalid=4308, Unknown=0, NotChecked=0, Total=4830 [2024-11-11 20:57:20,859 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:20,859 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 271 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-11 20:57:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-11 20:57:20,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2024-11-11 20:57:20,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 9 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (29), 14 states have call predecessors, (29), 9 states have call successors, (29) [2024-11-11 20:57:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2024-11-11 20:57:20,880 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 48 [2024-11-11 20:57:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:20,880 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2024-11-11 20:57:20,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.488888888888889) internal successors, (67), 34 states have internal predecessors, (67), 10 states have call successors, (10), 1 states have call predecessors, (10), 12 states have return successors, (18), 16 states have call predecessors, (18), 10 states have call successors, (18) [2024-11-11 20:57:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2024-11-11 20:57:20,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-11 20:57:20,884 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:20,884 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:20,900 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 20:57:21,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:21,085 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:21,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:21,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1792410124, now seen corresponding path program 7 times [2024-11-11 20:57:21,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:21,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406140453] [2024-11-11 20:57:21,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:21,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:21,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:21,478 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:21,575 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:21,611 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 20:57:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:21,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:22,001 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:22,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:22,245 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:22,338 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:22,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2024-11-11 20:57:22,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:22,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406140453] [2024-11-11 20:57:22,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406140453] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:57:22,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153332187] [2024-11-11 20:57:22,491 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-11 20:57:22,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:22,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:57:22,493 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 20:57:22,495 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 20:57:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:22,568 WARN L254 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-11 20:57:22,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:57:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-11-11 20:57:23,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:57:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 203 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-11 20:57:25,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153332187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:57:25,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:57:25,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 33] total 68 [2024-11-11 20:57:25,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960367412] [2024-11-11 20:57:25,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:57:25,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-11 20:57:25,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:25,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-11 20:57:25,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4308, Unknown=0, NotChecked=0, Total=4556 [2024-11-11 20:57:25,018 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand has 68 states, 64 states have (on average 1.421875) internal successors, (91), 41 states have internal predecessors, (91), 14 states have call successors, (14), 1 states have call predecessors, (14), 19 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) [2024-11-11 20:57:26,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:26,627 INFO L93 Difference]: Finished difference Result 89 states and 131 transitions. [2024-11-11 20:57:26,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-11 20:57:26,627 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 64 states have (on average 1.421875) internal successors, (91), 41 states have internal predecessors, (91), 14 states have call successors, (14), 1 states have call predecessors, (14), 19 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) Word has length 76 [2024-11-11 20:57:26,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:26,630 INFO L225 Difference]: With dead ends: 89 [2024-11-11 20:57:26,633 INFO L226 Difference]: Without dead ends: 79 [2024-11-11 20:57:26,636 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=703, Invalid=8417, Unknown=0, NotChecked=0, Total=9120 [2024-11-11 20:57:26,637 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:26,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 479 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1668 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-11 20:57:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-11 20:57:26,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2024-11-11 20:57:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.1) internal successors, (55), 51 states have internal predecessors, (55), 11 states have call successors, (11), 5 states have call predecessors, (11), 12 states have return successors, (41), 17 states have call predecessors, (41), 11 states have call successors, (41) [2024-11-11 20:57:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 107 transitions. [2024-11-11 20:57:26,663 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 107 transitions. Word has length 76 [2024-11-11 20:57:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:26,664 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 107 transitions. [2024-11-11 20:57:26,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 64 states have (on average 1.421875) internal successors, (91), 41 states have internal predecessors, (91), 14 states have call successors, (14), 1 states have call predecessors, (14), 19 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) [2024-11-11 20:57:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 107 transitions. [2024-11-11 20:57:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-11 20:57:26,668 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:26,668 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:26,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-11 20:57:26,872 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,SelfDestructingSolverStorable9 [2024-11-11 20:57:26,873 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:26,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:26,873 INFO L85 PathProgramCache]: Analyzing trace with hash -674912232, now seen corresponding path program 8 times [2024-11-11 20:57:26,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:26,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624061352] [2024-11-11 20:57:26,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:26,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:27,170 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:27,330 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:27,416 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:27,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:27,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:27,633 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-11 20:57:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:27,792 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:27,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:28,033 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:28,128 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:28,219 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-11-11 20:57:28,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:28,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624061352] [2024-11-11 20:57:28,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624061352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:57:28,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304298382] [2024-11-11 20:57:28,261 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 20:57:28,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:28,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:57:28,263 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 20:57:28,266 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 20:57:28,338 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 20:57:28,338 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:57:28,343 WARN L254 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-11 20:57:28,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:57:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 5 proven. 163 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2024-11-11 20:57:28,991 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:57:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 38 proven. 250 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-11 20:57:31,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304298382] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:57:31,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:57:31,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20, 36] total 72 [2024-11-11 20:57:31,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882669103] [2024-11-11 20:57:31,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:57:31,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-11 20:57:31,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:31,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-11 20:57:31,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=4838, Unknown=0, NotChecked=0, Total=5112 [2024-11-11 20:57:31,035 INFO L87 Difference]: Start difference. First operand 74 states and 107 transitions. Second operand has 72 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 44 states have internal predecessors, (97), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (29), 28 states have call predecessors, (29), 15 states have call successors, (29) [2024-11-11 20:57:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:32,454 INFO L93 Difference]: Finished difference Result 95 states and 136 transitions. [2024-11-11 20:57:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-11 20:57:32,454 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 44 states have internal predecessors, (97), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (29), 28 states have call predecessors, (29), 15 states have call successors, (29) Word has length 83 [2024-11-11 20:57:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:32,455 INFO L225 Difference]: With dead ends: 95 [2024-11-11 20:57:32,455 INFO L226 Difference]: Without dead ends: 83 [2024-11-11 20:57:32,458 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=795, Invalid=8907, Unknown=0, NotChecked=0, Total=9702 [2024-11-11 20:57:32,459 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:32,459 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 421 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-11 20:57:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-11 20:57:32,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2024-11-11 20:57:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 8 states have call successors, (8), 4 states have call predecessors, (8), 12 states have return successors, (31), 15 states have call predecessors, (31), 8 states have call successors, (31) [2024-11-11 20:57:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2024-11-11 20:57:32,482 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 83 [2024-11-11 20:57:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:32,483 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2024-11-11 20:57:32,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 44 states have internal predecessors, (97), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (29), 28 states have call predecessors, (29), 15 states have call successors, (29) [2024-11-11 20:57:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2024-11-11 20:57:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-11 20:57:32,484 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:32,484 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:32,502 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 20:57:32,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:32,685 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:32,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:32,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1119099064, now seen corresponding path program 9 times [2024-11-11 20:57:32,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:32,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76455132] [2024-11-11 20:57:32,686 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:32,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:32,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:33,049 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:33,131 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:33,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 20:57:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:33,366 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:33,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:33,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:33,795 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:33,895 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:34,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:34,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-11-11 20:57:34,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:34,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76455132] [2024-11-11 20:57:34,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76455132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:57:34,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673578129] [2024-11-11 20:57:34,137 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 20:57:34,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:34,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:57:34,139 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 20:57:34,141 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 20:57:34,223 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-11 20:57:34,223 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:57:34,228 WARN L254 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-11 20:57:34,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:57:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2024-11-11 20:57:34,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:57:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-11 20:57:37,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673578129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:57:37,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:57:37,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24, 36] total 74 [2024-11-11 20:57:37,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525960287] [2024-11-11 20:57:37,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:57:37,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-11 20:57:37,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:37,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-11 20:57:37,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=5132, Unknown=0, NotChecked=0, Total=5402 [2024-11-11 20:57:37,100 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 44 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) [2024-11-11 20:57:38,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:38,513 INFO L93 Difference]: Finished difference Result 87 states and 121 transitions. [2024-11-11 20:57:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-11 20:57:38,514 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 44 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) Word has length 83 [2024-11-11 20:57:38,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:38,515 INFO L225 Difference]: With dead ends: 87 [2024-11-11 20:57:38,515 INFO L226 Difference]: Without dead ends: 80 [2024-11-11 20:57:38,516 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=736, Invalid=9364, Unknown=0, NotChecked=0, Total=10100 [2024-11-11 20:57:38,517 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 78 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:38,517 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 538 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-11 20:57:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-11 20:57:38,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2024-11-11 20:57:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 48 states have internal predecessors, (51), 8 states have call successors, (8), 4 states have call predecessors, (8), 13 states have return successors, (34), 16 states have call predecessors, (34), 8 states have call successors, (34) [2024-11-11 20:57:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2024-11-11 20:57:38,535 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 83 [2024-11-11 20:57:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:38,535 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2024-11-11 20:57:38,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 44 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) [2024-11-11 20:57:38,537 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2024-11-11 20:57:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-11 20:57:38,538 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:38,538 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:38,555 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 20:57:38,739 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,SelfDestructingSolverStorable11 [2024-11-11 20:57:38,739 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:38,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:38,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1108033402, now seen corresponding path program 10 times [2024-11-11 20:57:38,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:38,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461237115] [2024-11-11 20:57:38,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:38,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:39,023 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:39,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:39,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:39,314 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:39,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:39,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:39,553 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-11-11 20:57:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:39,671 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:39,773 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:39,863 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:39,949 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-11-11 20:57:39,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:39,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461237115] [2024-11-11 20:57:39,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461237115] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:57:39,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554693259] [2024-11-11 20:57:39,992 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 20:57:39,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:39,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:57:39,994 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 20:57:39,996 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 20:57:40,082 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 20:57:40,083 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:57:40,086 WARN L254 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-11 20:57:40,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:57:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2024-11-11 20:57:40,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:57:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 38 proven. 250 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-11 20:57:42,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554693259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:57:42,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:57:42,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20, 36] total 73 [2024-11-11 20:57:42,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110611102] [2024-11-11 20:57:42,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:57:42,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-11 20:57:42,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:42,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-11 20:57:42,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=4975, Unknown=0, NotChecked=0, Total=5256 [2024-11-11 20:57:42,842 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand has 73 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 45 states have internal predecessors, (98), 15 states have call successors, (15), 1 states have call predecessors, (15), 22 states have return successors, (29), 28 states have call predecessors, (29), 15 states have call successors, (29) [2024-11-11 20:57:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:44,219 INFO L93 Difference]: Finished difference Result 91 states and 126 transitions. [2024-11-11 20:57:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-11 20:57:44,220 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 45 states have internal predecessors, (98), 15 states have call successors, (15), 1 states have call predecessors, (15), 22 states have return successors, (29), 28 states have call predecessors, (29), 15 states have call successors, (29) Word has length 83 [2024-11-11 20:57:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:44,221 INFO L225 Difference]: With dead ends: 91 [2024-11-11 20:57:44,221 INFO L226 Difference]: Without dead ends: 78 [2024-11-11 20:57:44,222 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=799, Invalid=8903, Unknown=0, NotChecked=0, Total=9702 [2024-11-11 20:57:44,223 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1826 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:44,223 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 462 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1826 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-11 20:57:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-11 20:57:44,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2024-11-11 20:57:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 48 states have internal predecessors, (51), 8 states have call successors, (8), 4 states have call predecessors, (8), 13 states have return successors, (33), 16 states have call predecessors, (33), 8 states have call successors, (33) [2024-11-11 20:57:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 92 transitions. [2024-11-11 20:57:44,243 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 92 transitions. Word has length 83 [2024-11-11 20:57:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:44,244 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 92 transitions. [2024-11-11 20:57:44,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 45 states have internal predecessors, (98), 15 states have call successors, (15), 1 states have call predecessors, (15), 22 states have return successors, (29), 28 states have call predecessors, (29), 15 states have call successors, (29) [2024-11-11 20:57:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 92 transitions. [2024-11-11 20:57:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-11 20:57:44,245 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:44,245 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:44,263 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 20:57:44,449 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,SelfDestructingSolverStorable12 [2024-11-11 20:57:44,450 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:44,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:44,450 INFO L85 PathProgramCache]: Analyzing trace with hash -287264164, now seen corresponding path program 11 times [2024-11-11 20:57:44,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:44,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784259886] [2024-11-11 20:57:44,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:44,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:44,747 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:44,805 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:44,879 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:44,915 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 20:57:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:45,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:45,346 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:45,484 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:45,590 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:45,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:45,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:45,896 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:46,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-11-11 20:57:46,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:46,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784259886] [2024-11-11 20:57:46,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784259886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:57:46,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796511237] [2024-11-11 20:57:46,045 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-11 20:57:46,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:46,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:57:46,047 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 20:57:46,049 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 20:57:46,141 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-11 20:57:46,142 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:57:46,146 WARN L254 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-11-11 20:57:46,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:57:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 17 proven. 193 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-11 20:57:47,026 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:57:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 315 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-11 20:57:49,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796511237] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:57:49,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:57:49,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 39] total 80 [2024-11-11 20:57:49,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255465775] [2024-11-11 20:57:49,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:57:49,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-11 20:57:49,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:49,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-11 20:57:49,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=6028, Unknown=0, NotChecked=0, Total=6320 [2024-11-11 20:57:49,467 INFO L87 Difference]: Start difference. First operand 69 states and 92 transitions. Second operand has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2024-11-11 20:57:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:51,191 INFO L93 Difference]: Finished difference Result 88 states and 123 transitions. [2024-11-11 20:57:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-11 20:57:51,192 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) Word has length 90 [2024-11-11 20:57:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:51,193 INFO L225 Difference]: With dead ends: 88 [2024-11-11 20:57:51,193 INFO L226 Difference]: Without dead ends: 81 [2024-11-11 20:57:51,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=817, Invalid=10739, Unknown=0, NotChecked=0, Total=11556 [2024-11-11 20:57:51,195 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:51,197 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 616 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2140 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-11 20:57:51,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-11 20:57:51,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2024-11-11 20:57:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 8 states have call successors, (8), 4 states have call predecessors, (8), 14 states have return successors, (36), 17 states have call predecessors, (36), 8 states have call successors, (36) [2024-11-11 20:57:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2024-11-11 20:57:51,212 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 90 [2024-11-11 20:57:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:51,213 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2024-11-11 20:57:51,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2024-11-11 20:57:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2024-11-11 20:57:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-11 20:57:51,214 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:51,214 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:51,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-11 20:57:51,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-11 20:57:51,419 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:51,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:51,419 INFO L85 PathProgramCache]: Analyzing trace with hash -401646488, now seen corresponding path program 12 times [2024-11-11 20:57:51,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:51,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722955331] [2024-11-11 20:57:51,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:51,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:51,676 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:51,734 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:51,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:51,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 20:57:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:52,080 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:52,285 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:52,469 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:52,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:52,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:52,856 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:52,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:53,049 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:53,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2024-11-11 20:57:53,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:57:53,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722955331] [2024-11-11 20:57:53,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722955331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:57:53,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851013327] [2024-11-11 20:57:53,192 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-11 20:57:53,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:57:53,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:57:53,194 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:57:53,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-11 20:57:53,300 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-11 20:57:53,301 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:57:53,306 WARN L254 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-11-11 20:57:53,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:57:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 18 proven. 229 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-11 20:57:54,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:57:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 380 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-11 20:57:57,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851013327] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:57:57,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:57:57,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27, 41] total 84 [2024-11-11 20:57:57,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304090136] [2024-11-11 20:57:57,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:57:57,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-11 20:57:57,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:57:57,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-11 20:57:57,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=6671, Unknown=0, NotChecked=0, Total=6972 [2024-11-11 20:57:57,035 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand has 84 states, 80 states have (on average 1.425) internal successors, (114), 48 states have internal predecessors, (114), 17 states have call successors, (17), 1 states have call predecessors, (17), 25 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) [2024-11-11 20:57:58,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:57:58,938 INFO L93 Difference]: Finished difference Result 91 states and 128 transitions. [2024-11-11 20:57:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-11 20:57:58,938 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 80 states have (on average 1.425) internal successors, (114), 48 states have internal predecessors, (114), 17 states have call successors, (17), 1 states have call predecessors, (17), 25 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) Word has length 97 [2024-11-11 20:57:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:57:58,940 INFO L225 Difference]: With dead ends: 91 [2024-11-11 20:57:58,940 INFO L226 Difference]: Without dead ends: 84 [2024-11-11 20:57:58,941 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=846, Invalid=12036, Unknown=0, NotChecked=0, Total=12882 [2024-11-11 20:57:58,942 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 127 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 2684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:57:58,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 725 Invalid, 2684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-11 20:57:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-11 20:57:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2024-11-11 20:57:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 8 states have call successors, (8), 4 states have call predecessors, (8), 15 states have return successors, (39), 18 states have call predecessors, (39), 8 states have call successors, (39) [2024-11-11 20:57:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2024-11-11 20:57:58,956 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 97 [2024-11-11 20:57:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:57:58,956 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2024-11-11 20:57:58,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 80 states have (on average 1.425) internal successors, (114), 48 states have internal predecessors, (114), 17 states have call successors, (17), 1 states have call predecessors, (17), 25 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) [2024-11-11 20:57:58,957 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2024-11-11 20:57:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-11 20:57:58,958 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:57:58,958 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:57:58,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-11 20:57:59,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-11 20:57:59,160 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:57:59,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:57:59,160 INFO L85 PathProgramCache]: Analyzing trace with hash 615917708, now seen corresponding path program 13 times [2024-11-11 20:57:59,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:57:59,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550491508] [2024-11-11 20:57:59,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:57:59,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:57:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:59,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:57:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:59,752 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:59,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:57:59,954 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:57:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:00,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:00,117 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:00,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:00,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-11-11 20:58:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:00,519 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:00,774 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:00,951 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:01,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:01,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:01,416 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:01,570 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:01,700 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:01,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:01,893 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-11-11 20:58:01,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:58:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550491508] [2024-11-11 20:58:01,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550491508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:58:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535249092] [2024-11-11 20:58:01,936 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-11 20:58:01,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:58:01,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:58:01,937 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:58:01,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-11 20:58:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:02,047 WARN L254 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 217 conjuncts are in the unsatisfiable core [2024-11-11 20:58:02,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:58:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 10 proven. 460 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2024-11-11 20:58:03,344 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:58:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 65 proven. 783 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-11-11 20:58:08,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535249092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:58:08,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:58:08,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 30, 57] total 112 [2024-11-11 20:58:08,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104773538] [2024-11-11 20:58:08,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:58:08,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-11-11 20:58:08,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:58:08,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-11-11 20:58:08,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=12000, Unknown=0, NotChecked=0, Total=12432 [2024-11-11 20:58:08,406 INFO L87 Difference]: Start difference. First operand 75 states and 102 transitions. Second operand has 112 states, 108 states have (on average 1.3981481481481481) internal successors, (151), 65 states have internal predecessors, (151), 22 states have call successors, (22), 1 states have call predecessors, (22), 35 states have return successors, (48), 47 states have call predecessors, (48), 22 states have call successors, (48) [2024-11-11 20:58:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:58:11,947 INFO L93 Difference]: Finished difference Result 103 states and 151 transitions. [2024-11-11 20:58:11,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-11 20:58:11,947 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 108 states have (on average 1.3981481481481481) internal successors, (151), 65 states have internal predecessors, (151), 22 states have call successors, (22), 1 states have call predecessors, (22), 35 states have return successors, (48), 47 states have call predecessors, (48), 22 states have call successors, (48) Word has length 132 [2024-11-11 20:58:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:58:11,948 INFO L225 Difference]: With dead ends: 103 [2024-11-11 20:58:11,948 INFO L226 Difference]: Without dead ends: 87 [2024-11-11 20:58:11,950 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4707 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1564, Invalid=21692, Unknown=0, NotChecked=0, Total=23256 [2024-11-11 20:58:11,950 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 189 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 4865 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 5014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 4865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:58:11,950 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1198 Invalid, 5014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 4865 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-11 20:58:11,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-11 20:58:11,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2024-11-11 20:58:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 54 states have internal predecessors, (57), 8 states have call successors, (8), 4 states have call predecessors, (8), 16 states have return successors, (42), 19 states have call predecessors, (42), 8 states have call successors, (42) [2024-11-11 20:58:11,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 107 transitions. [2024-11-11 20:58:11,964 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 107 transitions. Word has length 132 [2024-11-11 20:58:11,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:58:11,965 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 107 transitions. [2024-11-11 20:58:11,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 108 states have (on average 1.3981481481481481) internal successors, (151), 65 states have internal predecessors, (151), 22 states have call successors, (22), 1 states have call predecessors, (22), 35 states have return successors, (48), 47 states have call predecessors, (48), 22 states have call successors, (48) [2024-11-11 20:58:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 107 transitions. [2024-11-11 20:58:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-11 20:58:11,966 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:58:11,967 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:58:11,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-11 20:58:12,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:58:12,171 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:58:12,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:58:12,171 INFO L85 PathProgramCache]: Analyzing trace with hash 200427544, now seen corresponding path program 14 times [2024-11-11 20:58:12,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:58:12,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227806120] [2024-11-11 20:58:12,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:58:12,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:58:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:12,515 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 20:58:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:12,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:12,652 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:12,685 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 20:58:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:13,053 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:13,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:13,639 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:13,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:14,058 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:14,241 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:14,384 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:14,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:14,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:14,727 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:14,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-11 20:58:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:58:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2024-11-11 20:58:14,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:58:14,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227806120] [2024-11-11 20:58:14,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227806120] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:58:14,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846167793] [2024-11-11 20:58:14,851 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 20:58:14,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:58:14,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:58:14,853 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:58:14,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process