./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/s4if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 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/s4if.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 5fe0a71bff946f0cc68d0dab1416e0ef991c6bf06ad7cbb70643ca18073a3c7e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 22:35:47,795 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 22:35:47,881 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 22:35:47,888 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 22:35:47,889 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 22:35:47,921 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 22:35:47,923 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 22:35:47,923 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 22:35:47,924 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 22:35:47,925 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 22:35:47,926 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 22:35:47,927 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 22:35:47,927 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 22:35:47,929 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 22:35:47,929 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 22:35:47,930 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 22:35:47,930 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 22:35:47,933 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 22:35:47,934 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 22:35:47,934 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 22:35:47,934 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 22:35:47,935 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 22:35:47,935 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 22:35:47,935 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 22:35:47,935 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 22:35:47,936 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 22:35:47,936 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 22:35:47,936 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 22:35:47,936 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 22:35:47,937 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 22:35:47,937 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 22:35:47,937 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 22:35:47,937 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:35:47,937 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 22:35:47,938 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 22:35:47,938 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 22:35:47,938 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 22:35:47,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 22:35:47,938 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 22:35:47,939 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 22:35:47,939 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 22:35:47,941 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 22:35:47,941 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fe0a71bff946f0cc68d0dab1416e0ef991c6bf06ad7cbb70643ca18073a3c7e [2024-10-13 22:35:48,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 22:35:48,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 22:35:48,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 22:35:48,254 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 22:35:48,254 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 22:35:48,255 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s4if.c [2024-10-13 22:35:49,708 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 22:35:49,892 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 22:35:49,893 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s4if.c [2024-10-13 22:35:49,900 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/168add89a/0da7b99e695c4938b5e0afae3be21c24/FLAG1f3a4448c [2024-10-13 22:35:49,913 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/168add89a/0da7b99e695c4938b5e0afae3be21c24 [2024-10-13 22:35:49,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 22:35:49,918 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 22:35:49,920 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 22:35:49,922 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 22:35:49,927 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 22:35:49,928 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:35:49" (1/1) ... [2024-10-13 22:35:49,929 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437dfe3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:49, skipping insertion in model container [2024-10-13 22:35:49,930 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:35:49" (1/1) ... [2024-10-13 22:35:49,953 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 22:35:50,096 WARN L248 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/s4if.c[587,600] [2024-10-13 22:35:50,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:35:50,133 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 22:35:50,151 WARN L248 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/s4if.c[587,600] [2024-10-13 22:35:50,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:35:50,189 INFO L204 MainTranslator]: Completed translation [2024-10-13 22:35:50,189 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:50 WrapperNode [2024-10-13 22:35:50,189 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 22:35:50,191 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 22:35:50,191 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 22:35:50,191 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 22:35:50,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:50" (1/1) ... [2024-10-13 22:35:50,207 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:50" (1/1) ... [2024-10-13 22:35:50,230 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2024-10-13 22:35:50,230 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 22:35:50,231 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 22:35:50,231 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 22:35:50,231 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 22:35:50,241 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:50" (1/1) ... [2024-10-13 22:35:50,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:50" (1/1) ... [2024-10-13 22:35:50,244 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:50" (1/1) ... [2024-10-13 22:35:50,257 INFO L175 MemorySlicer]: Split 19 memory accesses to 4 slices as follows [2, 7, 4, 6]. 37 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 1, 3]. [2024-10-13 22:35:50,258 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:50" (1/1) ... [2024-10-13 22:35:50,258 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:50" (1/1) ... [2024-10-13 22:35:50,263 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:50" (1/1) ... [2024-10-13 22:35:50,268 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:50" (1/1) ... [2024-10-13 22:35:50,270 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:50" (1/1) ... [2024-10-13 22:35:50,271 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:50" (1/1) ... [2024-10-13 22:35:50,273 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 22:35:50,274 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 22:35:50,274 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 22:35:50,274 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 22:35:50,275 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:50" (1/1) ... [2024-10-13 22:35:50,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:35:50,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:35:50,311 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) [2024-10-13 22:35:50,334 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 [2024-10-13 22:35:50,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 22:35:50,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 22:35:50,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 22:35:50,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 22:35:50,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-13 22:35:50,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 22:35:50,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 22:35:50,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 22:35:50,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 22:35:50,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-13 22:35:50,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 22:35:50,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 22:35:50,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 22:35:50,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 22:35:50,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 22:35:50,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 22:35:50,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-13 22:35:50,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 22:35:50,498 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 22:35:50,501 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 22:35:50,679 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-13 22:35:50,679 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 22:35:50,709 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 22:35:50,709 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 22:35:50,709 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:35:50 BoogieIcfgContainer [2024-10-13 22:35:50,710 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 22:35:50,717 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 22:35:50,717 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 22:35:50,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 22:35:50,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:35:49" (1/3) ... [2024-10-13 22:35:50,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e816a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:35:50, skipping insertion in model container [2024-10-13 22:35:50,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:50" (2/3) ... [2024-10-13 22:35:50,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e816a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:35:50, skipping insertion in model container [2024-10-13 22:35:50,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:35:50" (3/3) ... [2024-10-13 22:35:50,723 INFO L112 eAbstractionObserver]: Analyzing ICFG s4if.c [2024-10-13 22:35:50,737 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 22:35:50,737 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 22:35:50,794 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 22:35:50,800 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;@6a093762, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 22:35:50,801 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 22:35:50,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:35:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-13 22:35:50,813 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:35:50,816 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:35:50,817 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:35:50,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:35:50,822 INFO L85 PathProgramCache]: Analyzing trace with hash -278767546, now seen corresponding path program 1 times [2024-10-13 22:35:50,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:35:50,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513534755] [2024-10-13 22:35:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:35:50,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:35:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:35:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:51,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:35:51,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513534755] [2024-10-13 22:35:51,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513534755] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:35:51,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:35:51,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 22:35:51,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190917996] [2024-10-13 22:35:51,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:35:51,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 22:35:51,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:35:51,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 22:35:51,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 22:35:51,037 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-10-13 22:35:51,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:35:51,056 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2024-10-13 22:35:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 22:35:51,062 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2024-10-13 22:35:51,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:35:51,068 INFO L225 Difference]: With dead ends: 29 [2024-10-13 22:35:51,069 INFO L226 Difference]: Without dead ends: 13 [2024-10-13 22:35:51,071 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 [2024-10-13 22:35:51,074 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:35:51,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:35:51,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-10-13 22:35:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-10-13 22:35:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:35:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-10-13 22:35:51,104 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2024-10-13 22:35:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:35:51,105 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-10-13 22:35:51,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-10-13 22:35:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-10-13 22:35:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-13 22:35:51,107 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:35:51,108 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:35:51,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 22:35:51,108 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:35:51,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:35:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1088114172, now seen corresponding path program 1 times [2024-10-13 22:35:51,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:35:51,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383927106] [2024-10-13 22:35:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:35:51,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:35:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:35:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:51,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:35:51,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383927106] [2024-10-13 22:35:51,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383927106] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:35:51,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:35:51,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 22:35:51,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306389008] [2024-10-13 22:35:51,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:35:51,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:35:51,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:35:51,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:35:51,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:35:51,332 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-10-13 22:35:51,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:35:51,410 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2024-10-13 22:35:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:35:51,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2024-10-13 22:35:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:35:51,412 INFO L225 Difference]: With dead ends: 25 [2024-10-13 22:35:51,412 INFO L226 Difference]: Without dead ends: 17 [2024-10-13 22:35:51,413 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 [2024-10-13 22:35:51,414 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:35:51,414 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 8 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:35:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-13 22:35:51,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2024-10-13 22:35:51,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:35:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-10-13 22:35:51,419 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2024-10-13 22:35:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:35:51,419 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-10-13 22:35:51,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-10-13 22:35:51,420 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-10-13 22:35:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-13 22:35:51,420 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:35:51,420 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:35:51,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 22:35:51,421 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:35:51,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:35:51,422 INFO L85 PathProgramCache]: Analyzing trace with hash 54367998, now seen corresponding path program 1 times [2024-10-13 22:35:51,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:35:51,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602736499] [2024-10-13 22:35:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:35:51,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:35:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:35:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:52,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:35:52,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602736499] [2024-10-13 22:35:52,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602736499] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:35:52,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775478905] [2024-10-13 22:35:52,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:35:52,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:35:52,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:35:52,067 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) [2024-10-13 22:35:52,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 22:35:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:35:52,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 22:35:52,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:35:52,235 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 [2024-10-13 22:35:52,361 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 [2024-10-13 22:35:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:52,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:35:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:52,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775478905] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:35:52,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:35:52,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2024-10-13 22:35:52,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427448473] [2024-10-13 22:35:52,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:35:52,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 22:35:52,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:35:52,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 22:35:52,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-10-13 22:35:52,553 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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) [2024-10-13 22:35:52,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:35:52,816 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2024-10-13 22:35:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 22:35:52,817 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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) Word has length 14 [2024-10-13 22:35:52,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:35:52,817 INFO L225 Difference]: With dead ends: 30 [2024-10-13 22:35:52,818 INFO L226 Difference]: Without dead ends: 26 [2024-10-13 22:35:52,818 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2024-10-13 22:35:52,819 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:35:52,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 35 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:35:52,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-13 22:35:52,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2024-10-13 22:35:52,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2024-10-13 22:35:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-10-13 22:35:52,828 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2024-10-13 22:35:52,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:35:52,828 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-10-13 22:35:52,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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) [2024-10-13 22:35:52,829 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-10-13 22:35:52,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-13 22:35:52,830 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:35:52,830 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:35:52,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 22:35:53,031 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 [2024-10-13 22:35:53,032 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:35:53,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:35:53,032 INFO L85 PathProgramCache]: Analyzing trace with hash 111626300, now seen corresponding path program 1 times [2024-10-13 22:35:53,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:35:53,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570508249] [2024-10-13 22:35:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:35:53,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:35:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:35:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:53,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:35:53,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570508249] [2024-10-13 22:35:53,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570508249] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:35:53,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744765047] [2024-10-13 22:35:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:35:53,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:35:53,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:35:53,249 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) [2024-10-13 22:35:53,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 22:35:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:35:53,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 22:35:53,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:35:53,324 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 [2024-10-13 22:35:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:53,348 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:35:53,378 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 [2024-10-13 22:35:53,382 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 [2024-10-13 22:35:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:53,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744765047] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:35:53,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:35:53,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-10-13 22:35:53,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650485471] [2024-10-13 22:35:53,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:35:53,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 22:35:53,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:35:53,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 22:35:53,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-13 22:35:53,396 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2024-10-13 22:35:53,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:35:53,451 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2024-10-13 22:35:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 22:35:53,452 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) Word has length 14 [2024-10-13 22:35:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:35:53,452 INFO L225 Difference]: With dead ends: 35 [2024-10-13 22:35:53,452 INFO L226 Difference]: Without dead ends: 23 [2024-10-13 22:35:53,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-13 22:35:53,454 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:35:53,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:35:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-13 22:35:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2024-10-13 22:35:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2024-10-13 22:35:53,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-10-13 22:35:53,460 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2024-10-13 22:35:53,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:35:53,460 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-10-13 22:35:53,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2024-10-13 22:35:53,460 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-10-13 22:35:53,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-13 22:35:53,461 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:35:53,461 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:35:53,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 22:35:53,661 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 [2024-10-13 22:35:53,662 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:35:53,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:35:53,663 INFO L85 PathProgramCache]: Analyzing trace with hash -230177790, now seen corresponding path program 2 times [2024-10-13 22:35:53,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:35:53,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718174184] [2024-10-13 22:35:53,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:35:53,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:35:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:35:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:53,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:35:53,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718174184] [2024-10-13 22:35:53,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718174184] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:35:53,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115525383] [2024-10-13 22:35:53,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:35:53,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:35:53,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:35:53,756 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) [2024-10-13 22:35:53,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 22:35:53,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:35:53,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:35:53,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 22:35:53,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:35:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:53,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:35:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:53,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115525383] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:35:53,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:35:53,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-13 22:35:53,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81207455] [2024-10-13 22:35:53,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:35:53,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 22:35:53,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:35:53,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 22:35:53,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-13 22:35:53,941 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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) [2024-10-13 22:35:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:35:54,055 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-10-13 22:35:54,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 22:35:54,055 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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 15 [2024-10-13 22:35:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:35:54,056 INFO L225 Difference]: With dead ends: 30 [2024-10-13 22:35:54,056 INFO L226 Difference]: Without dead ends: 26 [2024-10-13 22:35:54,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-10-13 22:35:54,057 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:35:54,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 19 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:35:54,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-13 22:35:54,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2024-10-13 22:35:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:35:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-10-13 22:35:54,066 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2024-10-13 22:35:54,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:35:54,066 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-10-13 22:35:54,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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) [2024-10-13 22:35:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-10-13 22:35:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-13 22:35:54,068 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:35:54,068 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:35:54,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 22:35:54,272 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 [2024-10-13 22:35:54,273 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:35:54,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:35:54,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2013377864, now seen corresponding path program 3 times [2024-10-13 22:35:54,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:35:54,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042153025] [2024-10-13 22:35:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:35:54,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:35:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:35:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:54,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:35:54,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042153025] [2024-10-13 22:35:54,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042153025] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:35:54,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405651884] [2024-10-13 22:35:54,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:35:54,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:35:54,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:35:54,352 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) [2024-10-13 22:35:54,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 22:35:54,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 22:35:54,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:35:54,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 22:35:54,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:35:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:54,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:35:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:54,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405651884] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:35:54,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:35:54,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-13 22:35:54,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948293717] [2024-10-13 22:35:54,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:35:54,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 22:35:54,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:35:54,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 22:35:54,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-13 22:35:54,503 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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) [2024-10-13 22:35:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:35:54,574 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-10-13 22:35:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 22:35:54,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 17 [2024-10-13 22:35:54,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:35:54,575 INFO L225 Difference]: With dead ends: 33 [2024-10-13 22:35:54,575 INFO L226 Difference]: Without dead ends: 21 [2024-10-13 22:35:54,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-10-13 22:35:54,577 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:35:54,577 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 30 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:35:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-13 22:35:54,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2024-10-13 22:35:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2024-10-13 22:35:54,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-10-13 22:35:54,583 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2024-10-13 22:35:54,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:35:54,583 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-10-13 22:35:54,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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) [2024-10-13 22:35:54,583 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-10-13 22:35:54,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-13 22:35:54,584 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:35:54,584 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:35:54,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 22:35:54,788 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 [2024-10-13 22:35:54,789 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:35:54,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:35:54,789 INFO L85 PathProgramCache]: Analyzing trace with hash -919717436, now seen corresponding path program 4 times [2024-10-13 22:35:54,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:35:54,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106764976] [2024-10-13 22:35:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:35:54,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:35:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:35:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:55,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:35:55,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106764976] [2024-10-13 22:35:55,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106764976] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:35:55,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662218026] [2024-10-13 22:35:55,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:35:55,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:35:55,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:35:55,258 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) [2024-10-13 22:35:55,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 22:35:55,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:35:55,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:35:55,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-13 22:35:55,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:35:55,334 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 [2024-10-13 22:35:55,500 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 [2024-10-13 22:35:55,684 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 [2024-10-13 22:35:55,701 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 22:35:55,701 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 23 treesize of output 7 [2024-10-13 22:35:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:55,779 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:35:56,041 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 22:35:56,042 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 25 treesize of output 9 [2024-10-13 22:35:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:56,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662218026] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:35:56,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:35:56,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2024-10-13 22:35:56,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676488095] [2024-10-13 22:35:56,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:35:56,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-13 22:35:56,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:35:56,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-13 22:35:56,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2024-10-13 22:35:56,306 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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) [2024-10-13 22:35:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:35:57,444 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2024-10-13 22:35:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-13 22:35:57,445 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-13 22:35:57,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:35:57,447 INFO L225 Difference]: With dead ends: 52 [2024-10-13 22:35:57,447 INFO L226 Difference]: Without dead ends: 42 [2024-10-13 22:35:57,448 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=346, Invalid=2104, Unknown=0, NotChecked=0, Total=2450 [2024-10-13 22:35:57,449 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:35:57,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 66 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:35:57,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-13 22:35:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2024-10-13 22:35:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 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) [2024-10-13 22:35:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2024-10-13 22:35:57,465 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 18 [2024-10-13 22:35:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:35:57,465 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2024-10-13 22:35:57,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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) [2024-10-13 22:35:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2024-10-13 22:35:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-13 22:35:57,466 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:35:57,467 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:35:57,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 22:35:57,670 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 [2024-10-13 22:35:57,671 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:35:57,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:35:57,671 INFO L85 PathProgramCache]: Analyzing trace with hash -862459134, now seen corresponding path program 1 times [2024-10-13 22:35:57,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:35:57,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309048605] [2024-10-13 22:35:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:35:57,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:35:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:35:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:57,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:35:57,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309048605] [2024-10-13 22:35:57,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309048605] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:35:57,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769087720] [2024-10-13 22:35:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:35:57,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:35:57,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:35:57,900 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) [2024-10-13 22:35:57,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 22:35:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:35:57,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 22:35:57,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:35:57,982 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 [2024-10-13 22:35:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:58,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:35:58,077 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 [2024-10-13 22:35:58,079 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 [2024-10-13 22:35:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:58,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769087720] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:35:58,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:35:58,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-10-13 22:35:58,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471296967] [2024-10-13 22:35:58,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:35:58,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 22:35:58,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:35:58,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 22:35:58,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:35:58,106 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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) [2024-10-13 22:35:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:35:58,185 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2024-10-13 22:35:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 22:35:58,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-13 22:35:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:35:58,186 INFO L225 Difference]: With dead ends: 58 [2024-10-13 22:35:58,186 INFO L226 Difference]: Without dead ends: 40 [2024-10-13 22:35:58,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-10-13 22:35:58,187 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:35:58,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 47 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:35:58,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-13 22:35:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2024-10-13 22:35:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 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) [2024-10-13 22:35:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2024-10-13 22:35:58,201 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 18 [2024-10-13 22:35:58,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:35:58,202 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2024-10-13 22:35:58,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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) [2024-10-13 22:35:58,203 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2024-10-13 22:35:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-13 22:35:58,203 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:35:58,203 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:35:58,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 22:35:58,407 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 [2024-10-13 22:35:58,408 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:35:58,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:35:58,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1651358520, now seen corresponding path program 5 times [2024-10-13 22:35:58,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:35:58,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371295590] [2024-10-13 22:35:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:35:58,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:35:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:35:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:58,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:35:58,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371295590] [2024-10-13 22:35:58,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371295590] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:35:58,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027245940] [2024-10-13 22:35:58,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:35:58,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:35:58,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:35:58,505 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) [2024-10-13 22:35:58,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 22:35:58,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 22:35:58,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:35:58,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:35:58,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:35:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:58,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:35:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:58,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027245940] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:35:58,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:35:58,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-13 22:35:58,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240400725] [2024-10-13 22:35:58,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:35:58,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 22:35:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:35:58,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 22:35:58,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:35:58,703 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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) [2024-10-13 22:35:58,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:35:58,848 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2024-10-13 22:35:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 22:35:58,848 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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 19 [2024-10-13 22:35:58,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:35:58,849 INFO L225 Difference]: With dead ends: 48 [2024-10-13 22:35:58,849 INFO L226 Difference]: Without dead ends: 44 [2024-10-13 22:35:58,850 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-10-13 22:35:58,850 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:35:58,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 21 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:35:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-13 22:35:58,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2024-10-13 22:35:58,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 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) [2024-10-13 22:35:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2024-10-13 22:35:58,862 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 19 [2024-10-13 22:35:58,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:35:58,863 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2024-10-13 22:35:58,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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) [2024-10-13 22:35:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2024-10-13 22:35:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-13 22:35:58,864 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:35:58,864 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:35:58,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-13 22:35:59,064 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 [2024-10-13 22:35:59,065 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:35:59,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:35:59,065 INFO L85 PathProgramCache]: Analyzing trace with hash -109476352, now seen corresponding path program 2 times [2024-10-13 22:35:59,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:35:59,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221187877] [2024-10-13 22:35:59,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:35:59,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:35:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:35:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:59,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:35:59,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221187877] [2024-10-13 22:35:59,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221187877] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:35:59,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470308621] [2024-10-13 22:35:59,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:35:59,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:35:59,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:35:59,161 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) [2024-10-13 22:35:59,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 22:35:59,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:35:59,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:35:59,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:35:59,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:35:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:59,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:35:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:35:59,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470308621] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:35:59,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:35:59,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-13 22:35:59,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142552388] [2024-10-13 22:35:59,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:35:59,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 22:35:59,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:35:59,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 22:35:59,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:35:59,354 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2024-10-13 22:35:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:35:59,415 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2024-10-13 22:35:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 22:35:59,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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 21 [2024-10-13 22:35:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:35:59,416 INFO L225 Difference]: With dead ends: 51 [2024-10-13 22:35:59,416 INFO L226 Difference]: Without dead ends: 25 [2024-10-13 22:35:59,417 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-10-13 22:35:59,417 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:35:59,417 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:35:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-13 22:35:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2024-10-13 22:35:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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) [2024-10-13 22:35:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-10-13 22:35:59,423 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2024-10-13 22:35:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:35:59,423 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-10-13 22:35:59,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2024-10-13 22:35:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-10-13 22:35:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-13 22:35:59,424 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:35:59,424 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:35:59,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-13 22:35:59,625 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 [2024-10-13 22:35:59,625 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:35:59,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:35:59,626 INFO L85 PathProgramCache]: Analyzing trace with hash 472759102, now seen corresponding path program 6 times [2024-10-13 22:35:59,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:35:59,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403416435] [2024-10-13 22:35:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:35:59,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:35:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:00,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:36:00,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403416435] [2024-10-13 22:36:00,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403416435] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:36:00,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24106607] [2024-10-13 22:36:00,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:36:00,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:36:00,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:36:00,147 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) [2024-10-13 22:36:00,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 22:36:00,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-13 22:36:00,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:36:00,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-13 22:36:00,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:36:00,238 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 [2024-10-13 22:36:00,375 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 [2024-10-13 22:36:00,512 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 [2024-10-13 22:36:00,683 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 [2024-10-13 22:36:00,693 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-10-13 22:36:00,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 10 [2024-10-13 22:36:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:00,793 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:36:01,316 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-10-13 22:36:01,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2024-10-13 22:36:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:01,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24106607] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:36:01,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:36:01,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 47 [2024-10-13 22:36:01,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791492181] [2024-10-13 22:36:01,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:36:01,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-13 22:36:01,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:36:01,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-13 22:36:01,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2024-10-13 22:36:01,561 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 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) [2024-10-13 22:36:02,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:36:02,448 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2024-10-13 22:36:02,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-13 22:36:02,449 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 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 [2024-10-13 22:36:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:36:02,450 INFO L225 Difference]: With dead ends: 46 [2024-10-13 22:36:02,450 INFO L226 Difference]: Without dead ends: 42 [2024-10-13 22:36:02,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=411, Invalid=3371, Unknown=0, NotChecked=0, Total=3782 [2024-10-13 22:36:02,451 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 22:36:02,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 98 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 22:36:02,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-13 22:36:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2024-10-13 22:36:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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) [2024-10-13 22:36:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-10-13 22:36:02,458 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 22 [2024-10-13 22:36:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:36:02,458 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-10-13 22:36:02,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 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) [2024-10-13 22:36:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-10-13 22:36:02,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-13 22:36:02,459 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:36:02,459 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:36:02,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 22:36:02,660 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 [2024-10-13 22:36:02,660 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:36:02,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:36:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash 530017404, now seen corresponding path program 3 times [2024-10-13 22:36:02,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:36:02,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721549235] [2024-10-13 22:36:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:36:02,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:36:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:03,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:36:03,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721549235] [2024-10-13 22:36:03,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721549235] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:36:03,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282170732] [2024-10-13 22:36:03,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:36:03,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:36:03,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:36:03,005 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) [2024-10-13 22:36:03,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 22:36:03,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 22:36:03,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:36:03,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 22:36:03,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:36:03,087 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 15 treesize of output 11 [2024-10-13 22:36:03,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:36:03,151 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 24 treesize of output 17 [2024-10-13 22:36:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-13 22:36:03,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:36:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-13 22:36:03,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282170732] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:36:03,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:36:03,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 17 [2024-10-13 22:36:03,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734207171] [2024-10-13 22:36:03,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:36:03,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 22:36:03,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:36:03,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 22:36:03,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-10-13 22:36:03,273 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:36:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:36:03,637 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2024-10-13 22:36:03,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 22:36:03,637 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-13 22:36:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:36:03,638 INFO L225 Difference]: With dead ends: 32 [2024-10-13 22:36:03,638 INFO L226 Difference]: Without dead ends: 28 [2024-10-13 22:36:03,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2024-10-13 22:36:03,639 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:36:03,639 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:36:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-13 22:36:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-10-13 22:36:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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) [2024-10-13 22:36:03,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-10-13 22:36:03,646 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 22 [2024-10-13 22:36:03,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:36:03,646 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-10-13 22:36:03,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:36:03,646 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-10-13 22:36:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 22:36:03,647 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:36:03,647 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:36:03,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-13 22:36:03,847 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 [2024-10-13 22:36:03,847 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:36:03,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:36:03,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1987303160, now seen corresponding path program 7 times [2024-10-13 22:36:03,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:36:03,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906528250] [2024-10-13 22:36:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:36:03,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:36:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:03,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:36:03,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906528250] [2024-10-13 22:36:03,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906528250] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:36:03,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037627842] [2024-10-13 22:36:03,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 22:36:03,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:36:03,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:36:03,984 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) [2024-10-13 22:36:03,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 22:36:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:04,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 22:36:04,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:36:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:04,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:36:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:04,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037627842] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:36:04,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:36:04,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-13 22:36:04,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097107822] [2024-10-13 22:36:04,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:36:04,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 22:36:04,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:36:04,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 22:36:04,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-13 22:36:04,228 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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) [2024-10-13 22:36:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:36:04,345 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2024-10-13 22:36:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 22:36:04,345 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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 25 [2024-10-13 22:36:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:36:04,346 INFO L225 Difference]: With dead ends: 52 [2024-10-13 22:36:04,346 INFO L226 Difference]: Without dead ends: 32 [2024-10-13 22:36:04,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-10-13 22:36:04,347 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:36:04,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 47 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:36:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-13 22:36:04,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2024-10-13 22:36:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 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) [2024-10-13 22:36:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-10-13 22:36:04,354 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 25 [2024-10-13 22:36:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:36:04,354 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-10-13 22:36:04,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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) [2024-10-13 22:36:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-10-13 22:36:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 22:36:04,355 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:36:04,356 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:36:04,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-13 22:36:04,556 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 [2024-10-13 22:36:04,557 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:36:04,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:36:04,557 INFO L85 PathProgramCache]: Analyzing trace with hash 152727940, now seen corresponding path program 8 times [2024-10-13 22:36:04,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:36:04,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487918160] [2024-10-13 22:36:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:36:04,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:36:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:05,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:36:05,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487918160] [2024-10-13 22:36:05,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487918160] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:36:05,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187678357] [2024-10-13 22:36:05,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:36:05,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:36:05,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:36:05,690 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) [2024-10-13 22:36:05,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 22:36:05,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:36:05,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:36:05,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-13 22:36:05,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:36:05,790 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 [2024-10-13 22:36:05,983 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 [2024-10-13 22:36:06,076 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 [2024-10-13 22:36:06,220 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 [2024-10-13 22:36:06,371 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 [2024-10-13 22:36:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:06,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:36:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:07,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187678357] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:36:07,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:36:07,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 49 [2024-10-13 22:36:07,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945028834] [2024-10-13 22:36:07,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:36:07,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-13 22:36:07,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:36:07,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-13 22:36:07,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2191, Unknown=0, NotChecked=0, Total=2352 [2024-10-13 22:36:07,147 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 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) [2024-10-13 22:36:08,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:36:08,017 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2024-10-13 22:36:08,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 22:36:08,018 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 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 26 [2024-10-13 22:36:08,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:36:08,018 INFO L225 Difference]: With dead ends: 50 [2024-10-13 22:36:08,019 INFO L226 Difference]: Without dead ends: 46 [2024-10-13 22:36:08,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=253, Invalid=3169, Unknown=0, NotChecked=0, Total=3422 [2024-10-13 22:36:08,020 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 22:36:08,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 116 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 22:36:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-13 22:36:08,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2024-10-13 22:36:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 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) [2024-10-13 22:36:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-10-13 22:36:08,031 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2024-10-13 22:36:08,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:36:08,031 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-10-13 22:36:08,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 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) [2024-10-13 22:36:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-10-13 22:36:08,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 22:36:08,032 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:36:08,032 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:36:08,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-13 22:36:08,236 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 [2024-10-13 22:36:08,237 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:36:08,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:36:08,237 INFO L85 PathProgramCache]: Analyzing trace with hash 832786310, now seen corresponding path program 4 times [2024-10-13 22:36:08,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:36:08,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000463336] [2024-10-13 22:36:08,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:36:08,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:36:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:08,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:36:08,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000463336] [2024-10-13 22:36:08,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000463336] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:36:08,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460780545] [2024-10-13 22:36:08,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:36:08,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:36:08,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:36:08,620 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) [2024-10-13 22:36:08,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 22:36:08,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:36:08,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:36:08,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 22:36:08,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:36:08,698 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 16 treesize of output 12 [2024-10-13 22:36:08,717 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 28 treesize of output 27 [2024-10-13 22:36:08,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:36:08,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2024-10-13 22:36:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-13 22:36:08,907 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:36:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-13 22:36:09,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460780545] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:36:09,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:36:09,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 26 [2024-10-13 22:36:09,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857083810] [2024-10-13 22:36:09,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:36:09,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-13 22:36:09,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:36:09,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-13 22:36:09,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2024-10-13 22:36:09,077 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2024-10-13 22:36:09,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:36:09,872 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2024-10-13 22:36:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 22:36:09,873 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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 26 [2024-10-13 22:36:09,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:36:09,873 INFO L225 Difference]: With dead ends: 59 [2024-10-13 22:36:09,873 INFO L226 Difference]: Without dead ends: 50 [2024-10-13 22:36:09,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=379, Invalid=1513, Unknown=0, NotChecked=0, Total=1892 [2024-10-13 22:36:09,874 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:36:09,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 51 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:36:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-13 22:36:09,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2024-10-13 22:36:09,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 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) [2024-10-13 22:36:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-10-13 22:36:09,891 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 26 [2024-10-13 22:36:09,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:36:09,891 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-10-13 22:36:09,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2024-10-13 22:36:09,891 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-10-13 22:36:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-13 22:36:09,891 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:36:09,892 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:36:09,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-13 22:36:10,092 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 [2024-10-13 22:36:10,092 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:36:10,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:36:10,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2069182600, now seen corresponding path program 9 times [2024-10-13 22:36:10,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:36:10,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373165180] [2024-10-13 22:36:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:36:10,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:36:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:10,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:36:10,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373165180] [2024-10-13 22:36:10,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373165180] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:36:10,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619212077] [2024-10-13 22:36:10,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:36:10,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:36:10,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:36:10,243 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) [2024-10-13 22:36:10,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 22:36:10,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-13 22:36:10,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:36:10,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 22:36:10,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:36:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:10,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:36:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:10,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619212077] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:36:10,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:36:10,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-10-13 22:36:10,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651577343] [2024-10-13 22:36:10,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:36:10,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 22:36:10,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:36:10,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 22:36:10,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-10-13 22:36:10,530 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 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) [2024-10-13 22:36:10,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:36:10,760 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2024-10-13 22:36:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 22:36:10,761 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 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 27 [2024-10-13 22:36:10,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:36:10,761 INFO L225 Difference]: With dead ends: 63 [2024-10-13 22:36:10,761 INFO L226 Difference]: Without dead ends: 59 [2024-10-13 22:36:10,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2024-10-13 22:36:10,762 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:36:10,762 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 36 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:36:10,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-13 22:36:10,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2024-10-13 22:36:10,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 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) [2024-10-13 22:36:10,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-10-13 22:36:10,771 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 27 [2024-10-13 22:36:10,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:36:10,772 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-10-13 22:36:10,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 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) [2024-10-13 22:36:10,772 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-10-13 22:36:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-13 22:36:10,773 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:36:10,777 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:36:10,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-13 22:36:10,981 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 [2024-10-13 22:36:10,982 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:36:10,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:36:10,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1208253182, now seen corresponding path program 10 times [2024-10-13 22:36:10,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:36:10,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34808083] [2024-10-13 22:36:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:36:10,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:36:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:11,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:36:11,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34808083] [2024-10-13 22:36:11,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34808083] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:36:11,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692756816] [2024-10-13 22:36:11,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:36:11,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:36:11,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:36:11,168 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) [2024-10-13 22:36:11,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 22:36:11,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:36:11,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:36:11,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 22:36:11,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:36:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:11,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:36:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:11,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692756816] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:36:11,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:36:11,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-10-13 22:36:11,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819642861] [2024-10-13 22:36:11,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:36:11,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 22:36:11,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:36:11,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 22:36:11,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-10-13 22:36:11,430 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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) [2024-10-13 22:36:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:36:11,528 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2024-10-13 22:36:11,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 22:36:11,528 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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 [2024-10-13 22:36:11,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:36:11,528 INFO L225 Difference]: With dead ends: 71 [2024-10-13 22:36:11,528 INFO L226 Difference]: Without dead ends: 43 [2024-10-13 22:36:11,529 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-10-13 22:36:11,529 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:36:11,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 28 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:36:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-13 22:36:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2024-10-13 22:36:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 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) [2024-10-13 22:36:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-10-13 22:36:11,537 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 29 [2024-10-13 22:36:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:36:11,537 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-10-13 22:36:11,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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) [2024-10-13 22:36:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-10-13 22:36:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-13 22:36:11,538 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:36:11,538 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:36:11,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-13 22:36:11,738 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 [2024-10-13 22:36:11,738 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:36:11,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:36:11,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1107742850, now seen corresponding path program 11 times [2024-10-13 22:36:11,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:36:11,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397194849] [2024-10-13 22:36:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:36:11,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:36:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:12,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:36:12,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397194849] [2024-10-13 22:36:12,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397194849] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:36:12,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298246592] [2024-10-13 22:36:12,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:36:12,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:36:12,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:36:12,517 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) [2024-10-13 22:36:12,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-13 22:36:12,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-13 22:36:12,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:36:12,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-10-13 22:36:12,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:36:12,614 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 [2024-10-13 22:36:12,807 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 [2024-10-13 22:36:12,992 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 [2024-10-13 22:36:13,221 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 [2024-10-13 22:36:16,521 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 [2024-10-13 22:36:16,809 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 [2024-10-13 22:36:16,821 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2024-10-13 22:36:16,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 56 treesize of output 16 [2024-10-13 22:36:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:16,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:36:18,190 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2024-10-13 22:36:18,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 61 treesize of output 21 [2024-10-13 22:36:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:18,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298246592] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:36:18,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:36:18,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 69 [2024-10-13 22:36:18,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145624660] [2024-10-13 22:36:18,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:36:18,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-10-13 22:36:18,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:36:18,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-10-13 22:36:18,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=4310, Unknown=0, NotChecked=0, Total=4692 [2024-10-13 22:36:18,715 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 69 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 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) [2024-10-13 22:36:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:36:27,797 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2024-10-13 22:36:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-10-13 22:36:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 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 30 [2024-10-13 22:36:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:36:27,798 INFO L225 Difference]: With dead ends: 113 [2024-10-13 22:36:27,798 INFO L226 Difference]: Without dead ends: 98 [2024-10-13 22:36:27,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1723, Invalid=12319, Unknown=0, NotChecked=0, Total=14042 [2024-10-13 22:36:27,801 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:36:27,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 108 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-13 22:36:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-13 22:36:27,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2024-10-13 22:36:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 74 states have internal predecessors, (91), 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) [2024-10-13 22:36:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2024-10-13 22:36:27,832 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 30 [2024-10-13 22:36:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:36:27,833 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2024-10-13 22:36:27,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 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) [2024-10-13 22:36:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2024-10-13 22:36:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-13 22:36:27,833 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:36:27,834 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:36:27,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-13 22:36:28,034 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 [2024-10-13 22:36:28,034 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:36:28,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:36:28,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2008077442, now seen corresponding path program 12 times [2024-10-13 22:36:28,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:36:28,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897081067] [2024-10-13 22:36:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:36:28,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:36:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:28,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:36:28,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897081067] [2024-10-13 22:36:28,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897081067] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:36:28,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820542216] [2024-10-13 22:36:28,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:36:28,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:36:28,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:36:28,226 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) [2024-10-13 22:36:28,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-13 22:36:28,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-13 22:36:28,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:36:28,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 22:36:28,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:36:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:28,485 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:36:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:28,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820542216] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:36:28,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:36:28,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-13 22:36:28,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283755794] [2024-10-13 22:36:28,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:36:28,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-13 22:36:28,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:36:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-13 22:36:28,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-10-13 22:36:28,609 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 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) [2024-10-13 22:36:28,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:36:28,974 INFO L93 Difference]: Finished difference Result 108 states and 130 transitions. [2024-10-13 22:36:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-13 22:36:28,974 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 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 31 [2024-10-13 22:36:28,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:36:28,975 INFO L225 Difference]: With dead ends: 108 [2024-10-13 22:36:28,975 INFO L226 Difference]: Without dead ends: 104 [2024-10-13 22:36:28,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2024-10-13 22:36:28,976 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:36:28,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:36:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-10-13 22:36:29,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 78. [2024-10-13 22:36:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 77 states have internal predecessors, (95), 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) [2024-10-13 22:36:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2024-10-13 22:36:29,002 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 31 [2024-10-13 22:36:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:36:29,002 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2024-10-13 22:36:29,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 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) [2024-10-13 22:36:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2024-10-13 22:36:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-13 22:36:29,003 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:36:29,003 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:36:29,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-13 22:36:29,203 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 [2024-10-13 22:36:29,204 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:36:29,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:36:29,204 INFO L85 PathProgramCache]: Analyzing trace with hash -425371324, now seen corresponding path program 13 times [2024-10-13 22:36:29,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:36:29,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771775511] [2024-10-13 22:36:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:36:29,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:36:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:30,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:36:30,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771775511] [2024-10-13 22:36:30,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771775511] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:36:30,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562108997] [2024-10-13 22:36:30,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 22:36:30,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:36:30,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:36:30,701 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) [2024-10-13 22:36:30,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-13 22:36:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:30,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-10-13 22:36:30,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:36:30,814 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 [2024-10-13 22:36:31,019 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 [2024-10-13 22:36:31,117 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 [2024-10-13 22:36:31,225 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 [2024-10-13 22:36:31,354 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 [2024-10-13 22:36:31,487 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 [2024-10-13 22:36:31,645 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 [2024-10-13 22:36:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:31,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:36:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:32,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562108997] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:36:32,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:36:32,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 23] total 68 [2024-10-13 22:36:32,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479922963] [2024-10-13 22:36:32,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:36:32,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-10-13 22:36:32,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:36:32,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-10-13 22:36:32,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=4328, Unknown=0, NotChecked=0, Total=4556 [2024-10-13 22:36:32,960 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand has 68 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 68 states have internal predecessors, (92), 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) [2024-10-13 22:36:34,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:36:34,657 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2024-10-13 22:36:34,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-13 22:36:34,658 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 68 states have internal predecessors, (92), 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 [2024-10-13 22:36:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:36:34,658 INFO L225 Difference]: With dead ends: 107 [2024-10-13 22:36:34,659 INFO L226 Difference]: Without dead ends: 103 [2024-10-13 22:36:34,660 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=356, Invalid=6286, Unknown=0, NotChecked=0, Total=6642 [2024-10-13 22:36:34,660 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:36:34,660 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 206 Invalid, 2138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2108 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-13 22:36:34,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-13 22:36:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2024-10-13 22:36:34,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2222222222222223) internal successors, (110), 90 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) [2024-10-13 22:36:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2024-10-13 22:36:34,697 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 34 [2024-10-13 22:36:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:36:34,697 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2024-10-13 22:36:34,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 68 states have internal predecessors, (92), 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) [2024-10-13 22:36:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2024-10-13 22:36:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-13 22:36:34,698 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:36:34,698 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:36:34,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-13 22:36:34,898 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 [2024-10-13 22:36:34,899 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:36:34,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:36:34,899 INFO L85 PathProgramCache]: Analyzing trace with hash -167205886, now seen corresponding path program 5 times [2024-10-13 22:36:34,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:36:34,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160549636] [2024-10-13 22:36:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:36:34,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:36:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 22:36:35,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:36:35,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160549636] [2024-10-13 22:36:35,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160549636] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:36:35,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661942703] [2024-10-13 22:36:35,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:36:35,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:36:35,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:36:35,285 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) [2024-10-13 22:36:35,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-13 22:36:35,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-13 22:36:35,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:36:35,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 22:36:35,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:36:35,464 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 [2024-10-13 22:36:35,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:36:35,475 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 21 treesize of output 20 [2024-10-13 22:36:35,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:36:35,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:36:35,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:36:35,526 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:36:35,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-10-13 22:36:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 22:36:37,941 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:36:38,078 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 [2024-10-13 22:36:38,080 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 25 treesize of output 21 [2024-10-13 22:36:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-13 22:36:38,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661942703] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:36:38,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:36:38,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2024-10-13 22:36:38,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407549015] [2024-10-13 22:36:38,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:36:38,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-13 22:36:38,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:36:38,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-13 22:36:38,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=776, Unknown=1, NotChecked=0, Total=930 [2024-10-13 22:36:38,147 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 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) [2024-10-13 22:36:42,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 22:36:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:36:43,420 INFO L93 Difference]: Finished difference Result 147 states and 181 transitions. [2024-10-13 22:36:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-13 22:36:43,421 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 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 [2024-10-13 22:36:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:36:43,422 INFO L225 Difference]: With dead ends: 147 [2024-10-13 22:36:43,422 INFO L226 Difference]: Without dead ends: 107 [2024-10-13 22:36:43,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=198, Invalid=991, Unknown=1, NotChecked=0, Total=1190 [2024-10-13 22:36:43,423 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:36:43,423 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 79 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 563 Invalid, 3 Unknown, 0 Unchecked, 5.1s Time] [2024-10-13 22:36:43,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-13 22:36:43,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 94. [2024-10-13 22:36:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 93 states have internal predecessors, (111), 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) [2024-10-13 22:36:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2024-10-13 22:36:43,455 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 34 [2024-10-13 22:36:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:36:43,455 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2024-10-13 22:36:43,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 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) [2024-10-13 22:36:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2024-10-13 22:36:43,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-13 22:36:43,455 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:36:43,456 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:36:43,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-13 22:36:43,656 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 [2024-10-13 22:36:43,656 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:36:43,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:36:43,657 INFO L85 PathProgramCache]: Analyzing trace with hash 37411912, now seen corresponding path program 14 times [2024-10-13 22:36:43,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:36:43,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198730887] [2024-10-13 22:36:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:36:43,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:36:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:43,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:36:43,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198730887] [2024-10-13 22:36:43,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198730887] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:36:43,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259325817] [2024-10-13 22:36:43,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:36:43,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:36:43,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:36:43,906 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) [2024-10-13 22:36:43,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-13 22:36:44,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:36:44,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:36:44,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 22:36:44,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:36:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:44,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:36:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:44,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259325817] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:36:44,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:36:44,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-10-13 22:36:44,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641163780] [2024-10-13 22:36:44,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:36:44,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-13 22:36:44,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:36:44,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-13 22:36:44,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-10-13 22:36:44,340 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) [2024-10-13 22:36:44,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:36:44,687 INFO L93 Difference]: Finished difference Result 137 states and 161 transitions. [2024-10-13 22:36:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-13 22:36:44,688 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) Word has length 35 [2024-10-13 22:36:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:36:44,691 INFO L225 Difference]: With dead ends: 137 [2024-10-13 22:36:44,691 INFO L226 Difference]: Without dead ends: 133 [2024-10-13 22:36:44,691 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2024-10-13 22:36:44,692 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:36:44,693 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 32 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:36:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-10-13 22:36:44,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2024-10-13 22:36:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2125) internal successors, (97), 80 states have internal predecessors, (97), 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) [2024-10-13 22:36:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2024-10-13 22:36:44,730 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 35 [2024-10-13 22:36:44,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:36:44,731 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2024-10-13 22:36:44,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) [2024-10-13 22:36:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2024-10-13 22:36:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-13 22:36:44,731 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:36:44,731 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:36:44,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-13 22:36:44,932 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 [2024-10-13 22:36:44,932 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:36:44,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:36:44,932 INFO L85 PathProgramCache]: Analyzing trace with hash -544570046, now seen corresponding path program 15 times [2024-10-13 22:36:44,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:36:44,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434976605] [2024-10-13 22:36:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:36:44,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:36:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 54 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:45,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:36:45,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434976605] [2024-10-13 22:36:45,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434976605] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:36:45,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301104828] [2024-10-13 22:36:45,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:36:45,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:36:45,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:36:45,165 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) [2024-10-13 22:36:45,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-13 22:36:45,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-10-13 22:36:45,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:36:45,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 22:36:45,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:36:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:45,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:36:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:45,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301104828] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:36:45,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:36:45,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-10-13 22:36:45,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589061156] [2024-10-13 22:36:45,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:36:45,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-13 22:36:45,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:36:45,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-13 22:36:45,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-10-13 22:36:45,569 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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) [2024-10-13 22:36:45,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:36:45,728 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2024-10-13 22:36:45,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 22:36:45,729 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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 37 [2024-10-13 22:36:45,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:36:45,730 INFO L225 Difference]: With dead ends: 140 [2024-10-13 22:36:45,730 INFO L226 Difference]: Without dead ends: 51 [2024-10-13 22:36:45,730 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-10-13 22:36:45,731 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:36:45,731 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 39 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:36:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-13 22:36:45,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2024-10-13 22:36:45,743 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) [2024-10-13 22:36:45,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-10-13 22:36:45,744 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 37 [2024-10-13 22:36:45,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:36:45,744 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-10-13 22:36:45,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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) [2024-10-13 22:36:45,744 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-10-13 22:36:45,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-13 22:36:45,744 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:36:45,745 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:36:45,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-13 22:36:45,945 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 [2024-10-13 22:36:45,945 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:36:45,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:36:45,945 INFO L85 PathProgramCache]: Analyzing trace with hash -614206530, now seen corresponding path program 16 times [2024-10-13 22:36:45,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:36:45,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113369599] [2024-10-13 22:36:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:36:45,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:36:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:36:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:47,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:36:47,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113369599] [2024-10-13 22:36:47,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113369599] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:36:47,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411798068] [2024-10-13 22:36:47,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:36:47,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:36:47,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:36:47,182 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) [2024-10-13 22:36:47,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-13 22:36:47,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:36:47,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:36:47,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-10-13 22:36:47,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:36:47,332 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 [2024-10-13 22:36:47,636 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 [2024-10-13 22:36:47,784 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 [2024-10-13 22:36:48,001 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 [2024-10-13 22:36:48,246 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 [2024-10-13 22:36:52,601 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 [2024-10-13 22:36:53,063 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 19 treesize of output 11 [2024-10-13 22:36:53,776 INFO L349 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2024-10-13 22:36:53,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 22 [2024-10-13 22:36:53,786 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 [2024-10-13 22:36:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:53,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:36:57,516 INFO L349 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2024-10-13 22:36:57,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 85 treesize of output 29 [2024-10-13 22:36:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:36:58,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411798068] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:36:58,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:36:58,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 93 [2024-10-13 22:36:58,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773042588] [2024-10-13 22:36:58,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:36:58,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-10-13 22:36:58,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:36:58,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-10-13 22:36:58,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=7933, Unknown=1, NotChecked=0, Total=8556 [2024-10-13 22:36:58,423 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 93 states, 93 states have (on average 1.096774193548387) internal successors, (102), 93 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) [2024-10-13 22:37:02,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-13 22:37:05,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-13 22:37:13,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]