./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.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 b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 17:09:37,115 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 17:09:37,168 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 17:09:37,180 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 17:09:37,180 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 17:09:37,204 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 17:09:37,205 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 17:09:37,205 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 17:09:37,205 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 17:09:37,206 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 17:09:37,206 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 17:09:37,206 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 17:09:37,207 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 17:09:37,207 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 17:09:37,207 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 17:09:37,208 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 17:09:37,208 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 17:09:37,208 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 17:09:37,208 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 17:09:37,209 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 17:09:37,209 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 17:09:37,213 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 17:09:37,213 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 17:09:37,213 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 17:09:37,213 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 17:09:37,213 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 17:09:37,214 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 17:09:37,214 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 17:09:37,214 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 17:09:37,214 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 17:09:37,214 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 17:09:37,214 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 17:09:37,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 17:09:37,215 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 17:09:37,215 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 17:09:37,215 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 17:09:37,215 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 17:09:37,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 17:09:37,216 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 17:09:37,216 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 17:09:37,216 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 17:09:37,217 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 17:09:37,226 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f [2024-11-19 17:09:37,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 17:09:37,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 17:09:37,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 17:09:37,441 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 17:09:37,442 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 17:09:37,442 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c [2024-11-19 17:09:38,627 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 17:09:38,769 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 17:09:38,772 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c [2024-11-19 17:09:38,779 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c108ea873/c0c0e7bbdd45420d86aae241ae81c745/FLAG23e5b936e [2024-11-19 17:09:39,188 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c108ea873/c0c0e7bbdd45420d86aae241ae81c745 [2024-11-19 17:09:39,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 17:09:39,192 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 17:09:39,193 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 17:09:39,194 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 17:09:39,198 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 17:09:39,199 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:09:39" (1/1) ... [2024-11-19 17:09:39,199 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13995270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39, skipping insertion in model container [2024-11-19 17:09:39,201 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:09:39" (1/1) ... [2024-11-19 17:09:39,217 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 17:09:39,343 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/array-fpi/s2lif.c[588,601] [2024-11-19 17:09:39,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 17:09:39,365 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 17:09:39,374 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/array-fpi/s2lif.c[588,601] [2024-11-19 17:09:39,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 17:09:39,392 INFO L204 MainTranslator]: Completed translation [2024-11-19 17:09:39,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39 WrapperNode [2024-11-19 17:09:39,392 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 17:09:39,393 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 17:09:39,393 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 17:09:39,393 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 17:09:39,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39" (1/1) ... [2024-11-19 17:09:39,404 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39" (1/1) ... [2024-11-19 17:09:39,418 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2024-11-19 17:09:39,420 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 17:09:39,420 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 17:09:39,421 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 17:09:39,421 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 17:09:39,429 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39" (1/1) ... [2024-11-19 17:09:39,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39" (1/1) ... [2024-11-19 17:09:39,431 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39" (1/1) ... [2024-11-19 17:09:39,443 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 7, 4]. 38 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 5 writes are split as follows [0, 0, 3, 2]. [2024-11-19 17:09:39,444 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39" (1/1) ... [2024-11-19 17:09:39,444 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39" (1/1) ... [2024-11-19 17:09:39,448 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39" (1/1) ... [2024-11-19 17:09:39,450 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39" (1/1) ... [2024-11-19 17:09:39,451 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39" (1/1) ... [2024-11-19 17:09:39,451 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39" (1/1) ... [2024-11-19 17:09:39,453 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 17:09:39,454 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 17:09:39,454 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 17:09:39,454 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 17:09:39,454 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39" (1/1) ... [2024-11-19 17:09:39,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 17:09:39,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:39,485 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) [2024-11-19 17:09:39,487 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 [2024-11-19 17:09:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 17:09:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 17:09:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 17:09:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 17:09:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-19 17:09:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 17:09:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 17:09:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 17:09:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 17:09:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-19 17:09:39,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 17:09:39,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 17:09:39,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 17:09:39,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 17:09:39,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 17:09:39,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 17:09:39,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-19 17:09:39,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 17:09:39,590 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 17:09:39,591 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 17:09:39,727 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-19 17:09:39,727 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 17:09:39,736 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 17:09:39,737 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 17:09:39,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:09:39 BoogieIcfgContainer [2024-11-19 17:09:39,737 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 17:09:39,739 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 17:09:39,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 17:09:39,741 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 17:09:39,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:09:39" (1/3) ... [2024-11-19 17:09:39,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e4ce57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:09:39, skipping insertion in model container [2024-11-19 17:09:39,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:39" (2/3) ... [2024-11-19 17:09:39,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e4ce57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:09:39, skipping insertion in model container [2024-11-19 17:09:39,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:09:39" (3/3) ... [2024-11-19 17:09:39,743 INFO L112 eAbstractionObserver]: Analyzing ICFG s2lif.c [2024-11-19 17:09:39,755 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 17:09:39,755 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 17:09:39,792 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 17:09:39,797 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;@1f3e1e36, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 17:09:39,797 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 17:09:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 17:09:39,806 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:39,806 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:39,807 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:39,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:39,811 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2024-11-19 17:09:39,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:39,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447860111] [2024-11-19 17:09:39,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:39,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:39,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:39,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447860111] [2024-11-19 17:09:39,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447860111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 17:09:39,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 17:09:39,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 17:09:39,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057077344] [2024-11-19 17:09:39,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 17:09:39,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 17:09:39,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:39,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 17:09:39,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 17:09:39,975 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:39,988 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2024-11-19 17:09:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 17:09:39,990 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-19 17:09:39,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:39,995 INFO L225 Difference]: With dead ends: 40 [2024-11-19 17:09:39,996 INFO L226 Difference]: Without dead ends: 18 [2024-11-19 17:09:39,998 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 17:09:40,000 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:40,001 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 17:09:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-19 17:09:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-19 17:09:40,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-11-19 17:09:40,024 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2024-11-19 17:09:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:40,024 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-11-19 17:09:40,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-19 17:09:40,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 17:09:40,025 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:40,025 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:40,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 17:09:40,026 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:40,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:40,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2024-11-19 17:09:40,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:40,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377514365] [2024-11-19 17:09:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:40,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:40,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:40,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377514365] [2024-11-19 17:09:40,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377514365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 17:09:40,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 17:09:40,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 17:09:40,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655126979] [2024-11-19 17:09:40,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 17:09:40,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 17:09:40,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:40,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 17:09:40,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 17:09:40,147 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:40,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:40,207 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2024-11-19 17:09:40,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 17:09:40,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-19 17:09:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:40,208 INFO L225 Difference]: With dead ends: 36 [2024-11-19 17:09:40,208 INFO L226 Difference]: Without dead ends: 25 [2024-11-19 17:09:40,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 17:09:40,209 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:40,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 11 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:40,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-19 17:09:40,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2024-11-19 17:09:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-19 17:09:40,218 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2024-11-19 17:09:40,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:40,218 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-19 17:09:40,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-19 17:09:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-19 17:09:40,219 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:40,219 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:40,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 17:09:40,219 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:40,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:40,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2024-11-19 17:09:40,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:40,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165812015] [2024-11-19 17:09:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:40,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:41,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:41,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165812015] [2024-11-19 17:09:41,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165812015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:41,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039284746] [2024-11-19 17:09:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:41,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:41,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:41,024 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) [2024-11-19 17:09:41,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 17:09:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:41,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-19 17:09:41,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:41,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:09:41,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:41,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:41,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:41,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-19 17:09:41,489 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:41,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2024-11-19 17:09:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:41,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039284746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:41,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:41,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2024-11-19 17:09:41,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252191933] [2024-11-19 17:09:41,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:41,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 17:09:41,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:41,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 17:09:41,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2024-11-19 17:09:41,589 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:41,951 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2024-11-19 17:09:41,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 17:09:41,952 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-19 17:09:41,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:41,953 INFO L225 Difference]: With dead ends: 46 [2024-11-19 17:09:41,953 INFO L226 Difference]: Without dead ends: 42 [2024-11-19 17:09:41,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2024-11-19 17:09:41,955 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:41,955 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 51 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:09:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-19 17:09:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2024-11-19 17:09:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-11-19 17:09:41,963 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2024-11-19 17:09:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:41,963 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-11-19 17:09:41,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:41,963 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-11-19 17:09:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-19 17:09:41,964 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:41,964 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:41,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:42,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:42,165 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:42,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:42,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2024-11-19 17:09:42,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:42,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692341667] [2024-11-19 17:09:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:42,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:42,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:42,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692341667] [2024-11-19 17:09:42,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692341667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:42,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879448772] [2024-11-19 17:09:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:42,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:42,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:42,306 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) [2024-11-19 17:09:42,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 17:09:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:42,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-19 17:09:42,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:42,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:09:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:42,387 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:42,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-19 17:09:42,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-19 17:09:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:42,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879448772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:42,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:42,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-19 17:09:42,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947800959] [2024-11-19 17:09:42,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:42,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 17:09:42,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:42,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 17:09:42,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-19 17:09:42,421 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:42,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:42,485 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2024-11-19 17:09:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 17:09:42,485 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-19 17:09:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:42,486 INFO L225 Difference]: With dead ends: 48 [2024-11-19 17:09:42,486 INFO L226 Difference]: Without dead ends: 37 [2024-11-19 17:09:42,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-19 17:09:42,487 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:42,487 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 74 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 17:09:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-19 17:09:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2024-11-19 17:09:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-19 17:09:42,492 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 20 [2024-11-19 17:09:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:42,492 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-19 17:09:42,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-19 17:09:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-19 17:09:42,493 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:42,493 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:42,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 17:09:42,693 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 [2024-11-19 17:09:42,694 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:42,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:42,695 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2024-11-19 17:09:42,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:42,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203115579] [2024-11-19 17:09:42,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:42,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:42,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:42,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203115579] [2024-11-19 17:09:42,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203115579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:42,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181249439] [2024-11-19 17:09:42,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:09:42,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:42,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:42,762 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) [2024-11-19 17:09:42,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 17:09:42,810 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:09:42,810 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:42,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 17:09:42,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:42,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:42,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181249439] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:42,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:42,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-19 17:09:42,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895622661] [2024-11-19 17:09:42,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:42,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 17:09:42,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:42,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 17:09:42,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 17:09:42,885 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:42,952 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2024-11-19 17:09:42,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 17:09:42,952 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-19 17:09:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:42,953 INFO L225 Difference]: With dead ends: 66 [2024-11-19 17:09:42,953 INFO L226 Difference]: Without dead ends: 40 [2024-11-19 17:09:42,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-19 17:09:42,953 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:42,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-19 17:09:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2024-11-19 17:09:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-19 17:09:42,958 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2024-11-19 17:09:42,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:42,958 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-19 17:09:42,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-19 17:09:42,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-19 17:09:42,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:42,959 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:42,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:43,159 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 [2024-11-19 17:09:43,160 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:43,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:43,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2024-11-19 17:09:43,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:43,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415171379] [2024-11-19 17:09:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:43,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:43,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:43,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415171379] [2024-11-19 17:09:43,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415171379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:43,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703559342] [2024-11-19 17:09:43,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:09:43,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:43,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:43,233 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) [2024-11-19 17:09:43,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 17:09:43,280 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 17:09:43,280 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:43,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 17:09:43,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:43,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:09:43,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:43,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 17:09:43,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:43,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-19 17:09:43,654 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:43,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2024-11-19 17:09:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 17:09:43,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703559342] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:43,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:43,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 25 [2024-11-19 17:09:43,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225039408] [2024-11-19 17:09:43,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:43,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 17:09:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:43,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 17:09:43,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2024-11-19 17:09:43,734 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:44,020 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2024-11-19 17:09:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 17:09:44,020 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-19 17:09:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:44,021 INFO L225 Difference]: With dead ends: 36 [2024-11-19 17:09:44,021 INFO L226 Difference]: Without dead ends: 28 [2024-11-19 17:09:44,021 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=329, Invalid=1231, Unknown=0, NotChecked=0, Total=1560 [2024-11-19 17:09:44,022 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:44,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 41 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:44,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-19 17:09:44,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-19 17:09:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-19 17:09:44,026 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2024-11-19 17:09:44,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:44,026 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-19 17:09:44,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:44,026 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-19 17:09:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-19 17:09:44,027 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:44,027 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:44,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:44,230 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 [2024-11-19 17:09:44,231 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:44,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2024-11-19 17:09:44,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:44,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378447187] [2024-11-19 17:09:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:44,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:45,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:45,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378447187] [2024-11-19 17:09:45,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378447187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:45,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241073854] [2024-11-19 17:09:45,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:09:45,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:45,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:45,017 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) [2024-11-19 17:09:45,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 17:09:45,072 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:09:45,073 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:45,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-19 17:09:45,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:45,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:09:45,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:45,309 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:45,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-19 17:09:45,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:45,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:45,441 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:45,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-11-19 17:09:45,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:45,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 382 treesize of output 379 [2024-11-19 17:09:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:45,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241073854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:45,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:45,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 45 [2024-11-19 17:09:45,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53351589] [2024-11-19 17:09:45,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:45,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-19 17:09:45,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:45,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-19 17:09:45,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1687, Unknown=0, NotChecked=0, Total=1980 [2024-11-19 17:09:45,986 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 45 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 45 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:47,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:47,042 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2024-11-19 17:09:47,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-19 17:09:47,043 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 45 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-19 17:09:47,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:47,044 INFO L225 Difference]: With dead ends: 87 [2024-11-19 17:09:47,044 INFO L226 Difference]: Without dead ends: 71 [2024-11-19 17:09:47,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=684, Invalid=3738, Unknown=0, NotChecked=0, Total=4422 [2024-11-19 17:09:47,045 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:47,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 84 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 17:09:47,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-19 17:09:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2024-11-19 17:09:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2024-11-19 17:09:47,055 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 27 [2024-11-19 17:09:47,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:47,056 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2024-11-19 17:09:47,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 45 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:47,056 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2024-11-19 17:09:47,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-19 17:09:47,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:47,057 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:47,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 17:09:47,257 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 [2024-11-19 17:09:47,257 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:47,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:47,258 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 1 times [2024-11-19 17:09:47,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:47,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80731412] [2024-11-19 17:09:47,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:47,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 17:09:47,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:47,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80731412] [2024-11-19 17:09:47,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80731412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:47,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504174211] [2024-11-19 17:09:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:47,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:47,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:47,450 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) [2024-11-19 17:09:47,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 17:09:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:47,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 17:09:47,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:47,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:09:47,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-19 17:09:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 17:09:47,551 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:47,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-19 17:09:47,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-19 17:09:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 17:09:47,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504174211] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:47,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:47,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-19 17:09:47,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679987622] [2024-11-19 17:09:47,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:47,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 17:09:47,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:47,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 17:09:47,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-19 17:09:47,613 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:47,710 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2024-11-19 17:09:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 17:09:47,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-19 17:09:47,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:47,711 INFO L225 Difference]: With dead ends: 80 [2024-11-19 17:09:47,711 INFO L226 Difference]: Without dead ends: 55 [2024-11-19 17:09:47,711 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-11-19 17:09:47,712 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:47,712 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:47,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-19 17:09:47,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2024-11-19 17:09:47,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:47,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2024-11-19 17:09:47,718 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 27 [2024-11-19 17:09:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:47,718 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2024-11-19 17:09:47,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2024-11-19 17:09:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 17:09:47,719 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:47,719 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:47,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:47,922 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 [2024-11-19 17:09:47,923 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:47,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:47,923 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2024-11-19 17:09:47,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:47,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206277356] [2024-11-19 17:09:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:47,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:47,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:47,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206277356] [2024-11-19 17:09:47,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206277356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:47,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284320613] [2024-11-19 17:09:47,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 17:09:47,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:47,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:47,998 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) [2024-11-19 17:09:47,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 17:09:48,056 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 17:09:48,056 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:48,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 17:09:48,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:48,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:48,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284320613] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:48,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:48,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-19 17:09:48,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249196598] [2024-11-19 17:09:48,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:48,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 17:09:48,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:48,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 17:09:48,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-19 17:09:48,148 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:48,233 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2024-11-19 17:09:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 17:09:48,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-19 17:09:48,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:48,234 INFO L225 Difference]: With dead ends: 85 [2024-11-19 17:09:48,235 INFO L226 Difference]: Without dead ends: 49 [2024-11-19 17:09:48,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-19 17:09:48,235 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:48,235 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:48,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-19 17:09:48,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2024-11-19 17:09:48,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:48,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-11-19 17:09:48,245 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 29 [2024-11-19 17:09:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:48,246 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-11-19 17:09:48,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:48,246 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-11-19 17:09:48,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 17:09:48,246 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:48,246 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:48,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:48,446 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 [2024-11-19 17:09:48,447 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:48,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1292373713, now seen corresponding path program 6 times [2024-11-19 17:09:48,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:48,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846870795] [2024-11-19 17:09:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:48,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 17:09:48,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:48,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846870795] [2024-11-19 17:09:48,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846870795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:48,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650636670] [2024-11-19 17:09:48,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 17:09:48,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:48,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:48,526 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) [2024-11-19 17:09:48,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 17:09:48,579 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 17:09:48,580 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:48,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 17:09:48,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:48,640 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:48,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650636670] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:48,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:48,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-19 17:09:48,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200472198] [2024-11-19 17:09:48,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:48,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 17:09:48,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:48,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 17:09:48,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-19 17:09:48,679 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:48,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:48,769 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2024-11-19 17:09:48,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 17:09:48,770 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-19 17:09:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:48,770 INFO L225 Difference]: With dead ends: 48 [2024-11-19 17:09:48,770 INFO L226 Difference]: Without dead ends: 38 [2024-11-19 17:09:48,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-11-19 17:09:48,771 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:48,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 23 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-19 17:09:48,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2024-11-19 17:09:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:48,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-11-19 17:09:48,779 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2024-11-19 17:09:48,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:48,779 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-11-19 17:09:48,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:48,779 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-11-19 17:09:48,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-19 17:09:48,780 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:48,780 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:48,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:48,980 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 [2024-11-19 17:09:48,981 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:48,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:48,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 7 times [2024-11-19 17:09:48,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:48,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363674530] [2024-11-19 17:09:48,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:48,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:50,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:50,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363674530] [2024-11-19 17:09:50,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363674530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:50,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738147269] [2024-11-19 17:09:50,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 17:09:50,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:50,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:50,040 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) [2024-11-19 17:09:50,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 17:09:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:50,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-19 17:09:50,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:50,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:09:50,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:50,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:50,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-19 17:09:50,410 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:50,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-19 17:09:50,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:50,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:50,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:50,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:51,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2024-11-19 17:09:51,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:51,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 11773 treesize of output 11191 [2024-11-19 17:09:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:51,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738147269] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:51,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:51,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 63 [2024-11-19 17:09:51,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517360576] [2024-11-19 17:09:51,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:51,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-19 17:09:51,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:51,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-19 17:09:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=3441, Unknown=0, NotChecked=0, Total=3906 [2024-11-19 17:09:51,700 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:52,858 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2024-11-19 17:09:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-19 17:09:52,859 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-19 17:09:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:52,859 INFO L225 Difference]: With dead ends: 84 [2024-11-19 17:09:52,859 INFO L226 Difference]: Without dead ends: 70 [2024-11-19 17:09:52,860 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=791, Invalid=5215, Unknown=0, NotChecked=0, Total=6006 [2024-11-19 17:09:52,861 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:52,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 117 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 17:09:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-19 17:09:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2024-11-19 17:09:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:52,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2024-11-19 17:09:52,867 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 34 [2024-11-19 17:09:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:52,867 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2024-11-19 17:09:52,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:52,867 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2024-11-19 17:09:52,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-19 17:09:52,868 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:52,868 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:52,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 17:09:53,068 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 [2024-11-19 17:09:53,069 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:53,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:53,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2033315503, now seen corresponding path program 2 times [2024-11-19 17:09:53,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:53,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284958791] [2024-11-19 17:09:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:53,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:09:53,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:53,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284958791] [2024-11-19 17:09:53,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284958791] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:53,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882601268] [2024-11-19 17:09:53,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:09:53,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:53,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:53,264 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) [2024-11-19 17:09:53,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 17:09:53,323 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:09:53,323 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:53,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 17:09:53,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:53,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:09:53,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-19 17:09:53,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-19 17:09:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:09:53,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:53,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-19 17:09:53,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-19 17:09:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:09:53,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882601268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:53,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:53,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2024-11-19 17:09:53,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053134269] [2024-11-19 17:09:53,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:53,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 17:09:53,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:53,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 17:09:53,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-11-19 17:09:53,514 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:53,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:53,616 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2024-11-19 17:09:53,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 17:09:53,617 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-19 17:09:53,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:53,617 INFO L225 Difference]: With dead ends: 77 [2024-11-19 17:09:53,617 INFO L226 Difference]: Without dead ends: 62 [2024-11-19 17:09:53,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2024-11-19 17:09:53,618 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:53,618 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 77 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:53,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-19 17:09:53,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2024-11-19 17:09:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2024-11-19 17:09:53,626 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2024-11-19 17:09:53,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:53,626 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2024-11-19 17:09:53,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:53,628 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2024-11-19 17:09:53,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-19 17:09:53,628 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:53,629 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:53,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:53,829 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 [2024-11-19 17:09:53,829 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:53,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:53,830 INFO L85 PathProgramCache]: Analyzing trace with hash 880380819, now seen corresponding path program 8 times [2024-11-19 17:09:53,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:53,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285940503] [2024-11-19 17:09:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:53,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 17:09:53,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:53,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285940503] [2024-11-19 17:09:53,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285940503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:53,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530545001] [2024-11-19 17:09:53,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:09:53,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:53,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:53,927 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) [2024-11-19 17:09:53,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 17:09:53,989 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:09:53,990 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:53,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 17:09:53,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 17:09:54,063 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 17:09:54,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530545001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:54,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:54,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-19 17:09:54,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738044558] [2024-11-19 17:09:54,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:54,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 17:09:54,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:54,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 17:09:54,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-19 17:09:54,121 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:54,237 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2024-11-19 17:09:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 17:09:54,237 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-19 17:09:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:54,237 INFO L225 Difference]: With dead ends: 95 [2024-11-19 17:09:54,238 INFO L226 Difference]: Without dead ends: 58 [2024-11-19 17:09:54,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-11-19 17:09:54,238 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:54,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 33 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:54,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-19 17:09:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2024-11-19 17:09:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-11-19 17:09:54,245 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 36 [2024-11-19 17:09:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:54,245 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-11-19 17:09:54,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-11-19 17:09:54,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-19 17:09:54,246 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:54,246 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:54,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:54,446 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 [2024-11-19 17:09:54,447 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:54,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:54,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1466624367, now seen corresponding path program 9 times [2024-11-19 17:09:54,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:54,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754519677] [2024-11-19 17:09:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:54,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:09:54,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:54,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754519677] [2024-11-19 17:09:54,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754519677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:54,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884143473] [2024-11-19 17:09:54,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:09:54,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:54,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:54,555 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) [2024-11-19 17:09:54,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 17:09:54,626 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 17:09:54,626 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:54,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-19 17:09:54,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:54,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:09:54,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:54,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:54,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-19 17:09:54,834 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:54,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-19 17:09:54,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:55,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:55,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:55,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 47 [2024-11-19 17:09:55,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-19 17:09:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 17:09:55,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:55,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 99 [2024-11-19 17:09:55,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:55,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1451 treesize of output 1437 [2024-11-19 17:09:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 17:09:55,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884143473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:55,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:55,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 22, 22] total 51 [2024-11-19 17:09:55,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220823812] [2024-11-19 17:09:55,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:55,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-19 17:09:55,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:55,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-19 17:09:55,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2024-11-19 17:09:55,834 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 51 states, 51 states have (on average 1.607843137254902) internal successors, (82), 51 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:56,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:56,687 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2024-11-19 17:09:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-19 17:09:56,688 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.607843137254902) internal successors, (82), 51 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-19 17:09:56,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:56,688 INFO L225 Difference]: With dead ends: 56 [2024-11-19 17:09:56,688 INFO L226 Difference]: Without dead ends: 44 [2024-11-19 17:09:56,689 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=644, Invalid=4758, Unknown=0, NotChecked=0, Total=5402 [2024-11-19 17:09:56,690 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 80 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:56,690 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 141 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 17:09:56,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-19 17:09:56,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-11-19 17:09:56,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:56,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2024-11-19 17:09:56,696 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 36 [2024-11-19 17:09:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:56,696 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2024-11-19 17:09:56,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.607843137254902) internal successors, (82), 51 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:09:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2024-11-19 17:09:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-19 17:09:56,697 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:56,697 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:56,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 17:09:56,897 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 [2024-11-19 17:09:56,897 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:56,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1118330549, now seen corresponding path program 10 times [2024-11-19 17:09:56,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:56,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767228936] [2024-11-19 17:09:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:56,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:58,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:58,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767228936] [2024-11-19 17:09:58,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767228936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:58,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425219938] [2024-11-19 17:09:58,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:09:58,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:58,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:58,199 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) [2024-11-19 17:09:58,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 17:09:58,277 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:09:58,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:58,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-19 17:09:58,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:58,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:09:58,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:58,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:58,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-19 17:09:58,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:58,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-19 17:09:58,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:58,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-11-19 17:09:59,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:59,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:59,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:59,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:09:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:59,368 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:00,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 196 [2024-11-19 17:10:00,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:00,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1528888 treesize of output 1471657 [2024-11-19 17:10:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:01,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425219938] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:01,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:01,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 85 [2024-11-19 17:10:01,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110395973] [2024-11-19 17:10:01,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:01,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-19 17:10:01,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:01,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-19 17:10:01,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=853, Invalid=6287, Unknown=0, NotChecked=0, Total=7140 [2024-11-19 17:10:01,089 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 85 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 85 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:03,065 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2024-11-19 17:10:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-19 17:10:03,070 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 85 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-19 17:10:03,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:03,071 INFO L225 Difference]: With dead ends: 104 [2024-11-19 17:10:03,071 INFO L226 Difference]: Without dead ends: 75 [2024-11-19 17:10:03,073 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4248 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1732, Invalid=11840, Unknown=0, NotChecked=0, Total=13572 [2024-11-19 17:10:03,075 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 100 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:03,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 136 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1569 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-19 17:10:03,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-19 17:10:03,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2024-11-19 17:10:03,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:03,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2024-11-19 17:10:03,087 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 41 [2024-11-19 17:10:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:03,087 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2024-11-19 17:10:03,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 85 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2024-11-19 17:10:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-19 17:10:03,088 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:03,088 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:03,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 17:10:03,292 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 [2024-11-19 17:10:03,293 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:03,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:03,293 INFO L85 PathProgramCache]: Analyzing trace with hash 97262195, now seen corresponding path program 3 times [2024-11-19 17:10:03,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:03,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117180075] [2024-11-19 17:10:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:03,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 17:10:03,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:03,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117180075] [2024-11-19 17:10:03,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117180075] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:03,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913717049] [2024-11-19 17:10:03,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:10:03,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:03,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:03,656 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) [2024-11-19 17:10:03,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 17:10:03,737 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-19 17:10:03,737 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:03,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-19 17:10:03,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:03,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 17:10:04,035 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2024-11-19 17:10:04,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-19 17:10:04,090 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2024-11-19 17:10:04,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-11-19 17:10:04,145 INFO L349 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2024-11-19 17:10:04,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2024-11-19 17:10:04,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:04,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-11-19 17:10:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:10:04,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:10:04,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913717049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:04,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:04,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 21] total 52 [2024-11-19 17:10:04,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109870021] [2024-11-19 17:10:04,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:04,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-19 17:10:04,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:04,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-19 17:10:04,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=2160, Unknown=0, NotChecked=0, Total=2652 [2024-11-19 17:10:04,803 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:05,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:05,623 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2024-11-19 17:10:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-19 17:10:05,624 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-19 17:10:05,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:05,624 INFO L225 Difference]: With dead ends: 88 [2024-11-19 17:10:05,624 INFO L226 Difference]: Without dead ends: 65 [2024-11-19 17:10:05,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2206 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1127, Invalid=5515, Unknown=0, NotChecked=0, Total=6642 [2024-11-19 17:10:05,626 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:05,626 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:10:05,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-19 17:10:05,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2024-11-19 17:10:05,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2024-11-19 17:10:05,633 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 41 [2024-11-19 17:10:05,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:05,633 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2024-11-19 17:10:05,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2024-11-19 17:10:05,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-19 17:10:05,633 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:05,633 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:05,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-19 17:10:05,834 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 [2024-11-19 17:10:05,834 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:05,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1824213007, now seen corresponding path program 11 times [2024-11-19 17:10:05,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:05,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829993874] [2024-11-19 17:10:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:05,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-19 17:10:05,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:05,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829993874] [2024-11-19 17:10:05,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829993874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:05,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049132852] [2024-11-19 17:10:05,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 17:10:05,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:05,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:05,967 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) [2024-11-19 17:10:05,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 17:10:06,138 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-19 17:10:06,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:06,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 17:10:06,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-19 17:10:06,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-19 17:10:06,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049132852] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:06,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:06,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-19 17:10:06,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709556084] [2024-11-19 17:10:06,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:06,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 17:10:06,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:06,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 17:10:06,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-19 17:10:06,283 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:06,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:06,452 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2024-11-19 17:10:06,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 17:10:06,453 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-19 17:10:06,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:06,453 INFO L225 Difference]: With dead ends: 74 [2024-11-19 17:10:06,453 INFO L226 Difference]: Without dead ends: 70 [2024-11-19 17:10:06,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2024-11-19 17:10:06,454 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 74 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:06,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 28 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:10:06,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-19 17:10:06,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2024-11-19 17:10:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2024-11-19 17:10:06,460 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 46 [2024-11-19 17:10:06,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:06,461 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2024-11-19 17:10:06,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:06,461 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2024-11-19 17:10:06,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-19 17:10:06,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:06,461 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:06,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 17:10:06,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 17:10:06,662 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:06,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:06,662 INFO L85 PathProgramCache]: Analyzing trace with hash 775276721, now seen corresponding path program 12 times [2024-11-19 17:10:06,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:06,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375691953] [2024-11-19 17:10:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:06,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:08,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:08,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375691953] [2024-11-19 17:10:08,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375691953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:08,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619761726] [2024-11-19 17:10:08,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 17:10:08,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:08,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:08,470 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:08,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 17:10:08,602 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-19 17:10:08,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:08,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-19 17:10:08,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:08,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:10:08,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:08,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:08,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-19 17:10:09,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:09,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-19 17:10:09,205 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:09,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-11-19 17:10:09,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:09,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2024-11-19 17:10:09,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:09,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:09,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:10,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:10,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 17:10:10,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:12,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 161 [2024-11-19 17:10:12,208 INFO L349 Elim1Store]: treesize reduction 100, result has 44.8 percent of original size [2024-11-19 17:10:12,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 25403 treesize of output 22633 [2024-11-19 17:10:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 17:10:12,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619761726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:12,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:12,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 33] total 99 [2024-11-19 17:10:12,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155139030] [2024-11-19 17:10:12,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:12,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-19 17:10:12,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:12,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-19 17:10:12,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=8745, Unknown=0, NotChecked=0, Total=9702 [2024-11-19 17:10:12,444 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 99 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 99 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:19,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:19,769 INFO L93 Difference]: Finished difference Result 170 states and 195 transitions. [2024-11-19 17:10:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-11-19 17:10:19,770 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 99 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-19 17:10:19,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:19,770 INFO L225 Difference]: With dead ends: 170 [2024-11-19 17:10:19,770 INFO L226 Difference]: Without dead ends: 146 [2024-11-19 17:10:19,772 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10230 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3016, Invalid=29564, Unknown=0, NotChecked=0, Total=32580 [2024-11-19 17:10:19,772 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 153 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3187 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 3531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 3187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:19,773 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 197 Invalid, 3531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 3187 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-19 17:10:19,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-19 17:10:19,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2024-11-19 17:10:19,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0932203389830508) internal successors, (129), 118 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:19,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2024-11-19 17:10:19,789 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 48 [2024-11-19 17:10:19,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:19,789 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2024-11-19 17:10:19,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 99 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:19,790 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2024-11-19 17:10:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-19 17:10:19,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:19,790 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:19,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-19 17:10:19,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 17:10:19,990 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:19,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:19,991 INFO L85 PathProgramCache]: Analyzing trace with hash -917562535, now seen corresponding path program 4 times [2024-11-19 17:10:19,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:19,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792965984] [2024-11-19 17:10:19,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:19,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-19 17:10:20,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:20,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792965984] [2024-11-19 17:10:20,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792965984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:20,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132428845] [2024-11-19 17:10:20,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:10:20,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:20,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:20,112 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:20,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 17:10:20,186 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:10:20,187 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:20,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 17:10:20,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 17:10:20,308 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 17:10:20,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132428845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:20,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:20,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 32 [2024-11-19 17:10:20,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985849352] [2024-11-19 17:10:20,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:20,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-19 17:10:20,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:20,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-19 17:10:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2024-11-19 17:10:20,424 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:20,863 INFO L93 Difference]: Finished difference Result 181 states and 195 transitions. [2024-11-19 17:10:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-19 17:10:20,864 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-19 17:10:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:20,864 INFO L225 Difference]: With dead ends: 181 [2024-11-19 17:10:20,864 INFO L226 Difference]: Without dead ends: 132 [2024-11-19 17:10:20,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=2706, Unknown=0, NotChecked=0, Total=3192 [2024-11-19 17:10:20,865 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:20,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 69 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 17:10:20,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-19 17:10:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 96. [2024-11-19 17:10:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 95 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2024-11-19 17:10:20,881 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 49 [2024-11-19 17:10:20,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:20,881 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2024-11-19 17:10:20,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2024-11-19 17:10:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-19 17:10:20,881 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:20,881 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:20,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-19 17:10:21,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:21,082 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:21,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:21,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1899679235, now seen corresponding path program 13 times [2024-11-19 17:10:21,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:21,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917683865] [2024-11-19 17:10:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:21,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:23,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:23,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917683865] [2024-11-19 17:10:23,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917683865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:23,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217863789] [2024-11-19 17:10:23,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 17:10:23,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:23,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:23,646 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:23,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 17:10:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:23,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-11-19 17:10:23,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:23,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:10:23,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:23,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:23,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-19 17:10:24,102 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:24,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-19 17:10:24,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:24,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-11-19 17:10:24,463 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:24,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2024-11-19 17:10:24,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:24,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 61 [2024-11-19 17:10:24,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:24,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:25,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:25,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:25,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:25,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:25,655 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:28,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 410 treesize of output 386 [2024-11-19 17:10:28,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:28,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 1687318880358 treesize of output 1663696560507 [2024-11-19 17:10:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:30,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217863789] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:30,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:30,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42, 42] total 112 [2024-11-19 17:10:30,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75093506] [2024-11-19 17:10:30,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:30,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-11-19 17:10:30,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:30,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-11-19 17:10:30,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=11472, Unknown=0, NotChecked=0, Total=12432 [2024-11-19 17:10:30,652 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 112 states, 112 states have (on average 1.2232142857142858) internal successors, (137), 112 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:34,438 INFO L93 Difference]: Finished difference Result 175 states and 192 transitions. [2024-11-19 17:10:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-19 17:10:34,439 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.2232142857142858) internal successors, (137), 112 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-19 17:10:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:34,439 INFO L225 Difference]: With dead ends: 175 [2024-11-19 17:10:34,439 INFO L226 Difference]: Without dead ends: 155 [2024-11-19 17:10:34,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5189 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1438, Invalid=15592, Unknown=0, NotChecked=0, Total=17030 [2024-11-19 17:10:34,441 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 3822 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 3921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:34,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 228 Invalid, 3921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3822 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-19 17:10:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-19 17:10:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 122. [2024-11-19 17:10:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0991735537190082) internal successors, (133), 121 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:34,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2024-11-19 17:10:34,463 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 55 [2024-11-19 17:10:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:34,463 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2024-11-19 17:10:34,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.2232142857142858) internal successors, (137), 112 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:34,463 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2024-11-19 17:10:34,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-19 17:10:34,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:34,463 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:34,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-19 17:10:34,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:34,664 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:34,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:34,664 INFO L85 PathProgramCache]: Analyzing trace with hash 589849727, now seen corresponding path program 5 times [2024-11-19 17:10:34,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:34,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244189291] [2024-11-19 17:10:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:34,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 16 proven. 71 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 17:10:35,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:35,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244189291] [2024-11-19 17:10:35,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244189291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:35,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964301338] [2024-11-19 17:10:35,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 17:10:35,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:35,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:35,081 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:35,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 17:10:35,502 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-19 17:10:35,502 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:35,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-19 17:10:35,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:35,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 17:10:35,587 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-19 17:10:35,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-19 17:10:35,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-19 17:10:35,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-19 17:10:35,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-19 17:10:35,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-19 17:10:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-19 17:10:35,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:35,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-11-19 17:10:35,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 86 [2024-11-19 17:10:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-19 17:10:35,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964301338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:35,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:35,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 16] total 38 [2024-11-19 17:10:35,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679513099] [2024-11-19 17:10:35,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:35,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-19 17:10:35,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:35,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-19 17:10:35,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 17:10:35,905 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:36,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:36,548 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2024-11-19 17:10:36,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-19 17:10:36,549 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-19 17:10:36,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:36,550 INFO L225 Difference]: With dead ends: 167 [2024-11-19 17:10:36,550 INFO L226 Difference]: Without dead ends: 132 [2024-11-19 17:10:36,550 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=503, Invalid=3529, Unknown=0, NotChecked=0, Total=4032 [2024-11-19 17:10:36,551 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:36,551 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 111 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 17:10:36,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-19 17:10:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 110. [2024-11-19 17:10:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0825688073394495) internal successors, (118), 109 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2024-11-19 17:10:36,570 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 55 [2024-11-19 17:10:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:36,570 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2024-11-19 17:10:36,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2024-11-19 17:10:36,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-19 17:10:36,571 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:36,571 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:36,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-19 17:10:36,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:36,771 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:36,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:36,772 INFO L85 PathProgramCache]: Analyzing trace with hash -177410273, now seen corresponding path program 14 times [2024-11-19 17:10:36,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:36,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121347214] [2024-11-19 17:10:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:36,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-19 17:10:36,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:36,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121347214] [2024-11-19 17:10:36,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121347214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:36,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523577026] [2024-11-19 17:10:36,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:10:36,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:36,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:36,953 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:36,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-19 17:10:37,042 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:10:37,042 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:37,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 17:10:37,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-19 17:10:37,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-19 17:10:37,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523577026] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:37,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:37,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-19 17:10:37,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110614804] [2024-11-19 17:10:37,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:37,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 17:10:37,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:37,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 17:10:37,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-11-19 17:10:37,259 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:37,454 INFO L93 Difference]: Finished difference Result 183 states and 197 transitions. [2024-11-19 17:10:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 17:10:37,455 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-19 17:10:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:37,456 INFO L225 Difference]: With dead ends: 183 [2024-11-19 17:10:37,456 INFO L226 Difference]: Without dead ends: 90 [2024-11-19 17:10:37,456 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-11-19 17:10:37,456 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 158 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:37,457 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 33 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:10:37,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-19 17:10:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2024-11-19 17:10:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 76 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2024-11-19 17:10:37,480 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 57 [2024-11-19 17:10:37,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:37,480 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2024-11-19 17:10:37,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2024-11-19 17:10:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-19 17:10:37,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:37,481 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:37,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-19 17:10:37,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-19 17:10:37,681 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:37,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:37,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1916145985, now seen corresponding path program 15 times [2024-11-19 17:10:37,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:37,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287309474] [2024-11-19 17:10:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:37,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 17:10:37,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:37,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287309474] [2024-11-19 17:10:37,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287309474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:37,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377344985] [2024-11-19 17:10:37,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:10:37,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:37,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:37,849 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:37,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-19 17:10:38,064 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-19 17:10:38,065 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:38,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-19 17:10:38,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:38,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:10:38,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:38,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:38,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-19 17:10:38,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:38,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-19 17:10:38,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:38,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-11-19 17:10:38,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:38,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2024-11-19 17:10:38,649 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:38,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 61 [2024-11-19 17:10:38,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:38,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:39,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:39,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-11-19 17:10:39,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2024-11-19 17:10:39,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:10:39,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:10:39,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:10:39,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:39,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 92 treesize of output 166 [2024-11-19 17:10:39,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 135 [2024-11-19 17:10:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 11 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 17:10:39,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:41,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 249 treesize of output 231 [2024-11-19 17:10:41,915 INFO L349 Elim1Store]: treesize reduction 80, result has 64.8 percent of original size [2024-11-19 17:10:41,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 5623863 treesize of output 5583008 [2024-11-19 17:10:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 17:10:43,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377344985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:43,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:43,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 39, 40] total 92 [2024-11-19 17:10:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797836128] [2024-11-19 17:10:43,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:43,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-19 17:10:43,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:43,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-19 17:10:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=7463, Unknown=0, NotChecked=0, Total=8372 [2024-11-19 17:10:43,639 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 92 states, 92 states have (on average 1.4456521739130435) internal successors, (133), 92 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:46,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:46,326 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2024-11-19 17:10:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-19 17:10:46,327 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.4456521739130435) internal successors, (133), 92 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-19 17:10:46,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:46,327 INFO L225 Difference]: With dead ends: 88 [2024-11-19 17:10:46,327 INFO L226 Difference]: Without dead ends: 70 [2024-11-19 17:10:46,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5030 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2191, Invalid=15365, Unknown=0, NotChecked=0, Total=17556 [2024-11-19 17:10:46,329 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 172 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:46,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 169 Invalid, 2531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2420 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-19 17:10:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-19 17:10:46,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2024-11-19 17:10:46,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2024-11-19 17:10:46,342 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 57 [2024-11-19 17:10:46,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:46,343 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2024-11-19 17:10:46,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.4456521739130435) internal successors, (133), 92 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2024-11-19 17:10:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-19 17:10:46,343 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:46,343 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:46,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-19 17:10:46,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-19 17:10:46,544 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:46,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:46,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1328267249, now seen corresponding path program 16 times [2024-11-19 17:10:46,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:46,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319818958] [2024-11-19 17:10:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:46,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:49,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:49,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319818958] [2024-11-19 17:10:49,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319818958] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:49,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888141327] [2024-11-19 17:10:49,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:10:49,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:49,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:49,995 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:49,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-19 17:10:50,116 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:10:50,117 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:50,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-19 17:10:50,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:50,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:10:50,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:50,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:50,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-19 17:10:50,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:50,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-19 17:10:51,070 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:51,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-11-19 17:10:51,262 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:51,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2024-11-19 17:10:51,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:51,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 61 [2024-11-19 17:10:51,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:51,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 71 [2024-11-19 17:10:51,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:52,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:52,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:52,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:52,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:52,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:53,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:53,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:57,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 533 treesize of output 505 [2024-11-19 17:10:57,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:57,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 13040225258765525 treesize of output 12925876049477207 [2024-11-19 17:11:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:04,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888141327] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:11:04,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:11:04,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 138 [2024-11-19 17:11:04,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573565621] [2024-11-19 17:11:04,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:11:04,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2024-11-19 17:11:04,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:11:04,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2024-11-19 17:11:04,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1706, Invalid=17200, Unknown=0, NotChecked=0, Total=18906 [2024-11-19 17:11:04,587 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 138 states, 138 states have (on average 1.2463768115942029) internal successors, (172), 138 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)