./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-patterns/array5_pattern.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-patterns/array5_pattern.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 3dd3ea9d30e76cbd39a744e53feb2b89c359b5b85c7df24161ceaf060cda3b02 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 22:25:32,110 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 22:25:32,199 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 22:25:32,206 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 22:25:32,208 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 22:25:32,239 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 22:25:32,240 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 22:25:32,241 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 22:25:32,242 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 22:25:32,243 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 22:25:32,244 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 22:25:32,244 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 22:25:32,245 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 22:25:32,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 22:25:32,247 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 22:25:32,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 22:25:32,248 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 22:25:32,248 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 22:25:32,250 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 22:25:32,250 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 22:25:32,251 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 22:25:32,251 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 22:25:32,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 22:25:32,252 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 22:25:32,252 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 22:25:32,252 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 22:25:32,253 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 22:25:32,253 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 22:25:32,253 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 22:25:32,253 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 22:25:32,253 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 22:25:32,254 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 22:25:32,254 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:25:32,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 22:25:32,255 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 22:25:32,255 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 22:25:32,256 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 22:25:32,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 22:25:32,256 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 22:25:32,256 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 22:25:32,256 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 22:25:32,257 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 22:25:32,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3dd3ea9d30e76cbd39a744e53feb2b89c359b5b85c7df24161ceaf060cda3b02 [2024-10-13 22:25:32,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 22:25:32,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 22:25:32,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 22:25:32,511 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 22:25:32,512 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 22:25:32,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array5_pattern.c [2024-10-13 22:25:33,924 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 22:25:34,104 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 22:25:34,105 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array5_pattern.c [2024-10-13 22:25:34,111 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da7e7d04/2953810507e5479884e513c3da1bc362/FLAGf13cc41ad [2024-10-13 22:25:34,480 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da7e7d04/2953810507e5479884e513c3da1bc362 [2024-10-13 22:25:34,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 22:25:34,483 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 22:25:34,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 22:25:34,486 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 22:25:34,489 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 22:25:34,490 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:25:34" (1/1) ... [2024-10-13 22:25:34,491 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2563c216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34, skipping insertion in model container [2024-10-13 22:25:34,491 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:25:34" (1/1) ... [2024-10-13 22:25:34,512 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 22:25:34,656 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-patterns/array5_pattern.c[1890,1903] [2024-10-13 22:25:34,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:25:34,688 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 22:25:34,699 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-patterns/array5_pattern.c[1890,1903] [2024-10-13 22:25:34,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:25:34,720 INFO L204 MainTranslator]: Completed translation [2024-10-13 22:25:34,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34 WrapperNode [2024-10-13 22:25:34,721 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 22:25:34,722 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 22:25:34,722 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 22:25:34,723 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 22:25:34,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34" (1/1) ... [2024-10-13 22:25:34,737 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34" (1/1) ... [2024-10-13 22:25:34,754 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2024-10-13 22:25:34,754 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 22:25:34,755 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 22:25:34,755 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 22:25:34,755 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 22:25:34,766 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34" (1/1) ... [2024-10-13 22:25:34,766 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34" (1/1) ... [2024-10-13 22:25:34,768 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34" (1/1) ... [2024-10-13 22:25:34,782 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2024-10-13 22:25:34,782 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34" (1/1) ... [2024-10-13 22:25:34,782 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34" (1/1) ... [2024-10-13 22:25:34,787 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34" (1/1) ... [2024-10-13 22:25:34,791 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34" (1/1) ... [2024-10-13 22:25:34,792 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34" (1/1) ... [2024-10-13 22:25:34,793 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34" (1/1) ... [2024-10-13 22:25:34,795 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 22:25:34,796 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 22:25:34,796 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 22:25:34,796 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 22:25:34,797 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34" (1/1) ... [2024-10-13 22:25:34,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:25:34,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:25:34,832 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 22:25:34,836 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 22:25:34,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 22:25:34,889 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-13 22:25:34,889 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-13 22:25:34,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 22:25:34,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 22:25:34,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 22:25:34,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 22:25:34,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 22:25:34,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 22:25:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 22:25:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 22:25:34,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 22:25:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 22:25:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 22:25:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 22:25:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 22:25:34,984 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 22:25:34,986 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 22:25:35,224 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-10-13 22:25:35,225 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 22:25:35,257 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 22:25:35,257 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 22:25:35,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:25:35 BoogieIcfgContainer [2024-10-13 22:25:35,257 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 22:25:35,259 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 22:25:35,259 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 22:25:35,262 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 22:25:35,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:25:34" (1/3) ... [2024-10-13 22:25:35,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250cb00c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:25:35, skipping insertion in model container [2024-10-13 22:25:35,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:34" (2/3) ... [2024-10-13 22:25:35,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250cb00c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:25:35, skipping insertion in model container [2024-10-13 22:25:35,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:25:35" (3/3) ... [2024-10-13 22:25:35,265 INFO L112 eAbstractionObserver]: Analyzing ICFG array5_pattern.c [2024-10-13 22:25:35,280 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 22:25:35,280 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 22:25:35,376 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 22:25:35,383 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;@77ee0456, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 22:25:35,384 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 22:25:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-13 22:25:35,407 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:25:35,408 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:25:35,409 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:25:35,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:25:35,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1117162808, now seen corresponding path program 1 times [2024-10-13 22:25:35,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:25:35,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514555517] [2024-10-13 22:25:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:35,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:25:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:35,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:25:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:35,592 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 22:25:35,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:25:35,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514555517] [2024-10-13 22:25:35,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514555517] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:25:35,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:25:35,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 22:25:35,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134047854] [2024-10-13 22:25:35,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:25:35,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 22:25:35,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:25:35,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 22:25:35,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 22:25:35,617 INFO L87 Difference]: Start difference. First operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-13 22:25:35,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:25:35,647 INFO L93 Difference]: Finished difference Result 44 states and 67 transitions. [2024-10-13 22:25:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 22:25:35,649 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-10-13 22:25:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:25:35,653 INFO L225 Difference]: With dead ends: 44 [2024-10-13 22:25:35,653 INFO L226 Difference]: Without dead ends: 21 [2024-10-13 22:25:35,655 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 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 22:25:35,658 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:25:35,659 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:25:35,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-13 22:25:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-13 22:25:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-10-13 22:25:35,691 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 15 [2024-10-13 22:25:35,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:25:35,692 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-10-13 22:25:35,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-13 22:25:35,692 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-10-13 22:25:35,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-13 22:25:35,693 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:25:35,693 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:25:35,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 22:25:35,694 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:25:35,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:25:35,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1293017300, now seen corresponding path program 1 times [2024-10-13 22:25:35,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:25:35,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069191337] [2024-10-13 22:25:35,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:35,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:25:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:35,870 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:25:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:35,876 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 22:25:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:25:35,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:25:35,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069191337] [2024-10-13 22:25:35,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069191337] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:25:35,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:25:35,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 22:25:35,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471875460] [2024-10-13 22:25:35,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:25:35,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:25:35,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:25:35,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:25:35,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:25:35,890 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:35,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:25:35,937 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2024-10-13 22:25:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:25:35,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-10-13 22:25:35,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:25:35,938 INFO L225 Difference]: With dead ends: 42 [2024-10-13 22:25:35,938 INFO L226 Difference]: Without dead ends: 26 [2024-10-13 22:25:35,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:25:35,940 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:25:35,940 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:25:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-13 22:25:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-10-13 22:25:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:25:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-10-13 22:25:35,950 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 24 [2024-10-13 22:25:35,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:25:35,951 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-10-13 22:25:35,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-10-13 22:25:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-13 22:25:35,952 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:25:35,952 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:25:35,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 22:25:35,953 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:25:35,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:25:35,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2102363926, now seen corresponding path program 1 times [2024-10-13 22:25:35,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:25:35,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911192952] [2024-10-13 22:25:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:35,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:25:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:36,179 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:25:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:36,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 22:25:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:25:36,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:25:36,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911192952] [2024-10-13 22:25:36,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911192952] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:25:36,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:25:36,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 22:25:36,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091819068] [2024-10-13 22:25:36,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:25:36,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:25:36,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:25:36,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:25:36,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:25:36,203 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:36,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:25:36,233 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2024-10-13 22:25:36,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:25:36,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-10-13 22:25:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:25:36,234 INFO L225 Difference]: With dead ends: 30 [2024-10-13 22:25:36,234 INFO L226 Difference]: Without dead ends: 26 [2024-10-13 22:25:36,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:25:36,236 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:25:36,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 52 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:25:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-13 22:25:36,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-10-13 22:25:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:25:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-10-13 22:25:36,248 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 24 [2024-10-13 22:25:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:25:36,248 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-10-13 22:25:36,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-10-13 22:25:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 22:25:36,250 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:25:36,250 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:25:36,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 22:25:36,251 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:25:36,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:25:36,251 INFO L85 PathProgramCache]: Analyzing trace with hash -722231353, now seen corresponding path program 1 times [2024-10-13 22:25:36,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:25:36,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899671382] [2024-10-13 22:25:36,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:36,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:25:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:36,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:25:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:36,386 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 22:25:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:25:36,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:25:36,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899671382] [2024-10-13 22:25:36,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899671382] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:25:36,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:25:36,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 22:25:36,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651849562] [2024-10-13 22:25:36,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:25:36,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 22:25:36,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:25:36,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 22:25:36,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:25:36,399 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:25:36,449 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2024-10-13 22:25:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 22:25:36,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2024-10-13 22:25:36,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:25:36,450 INFO L225 Difference]: With dead ends: 51 [2024-10-13 22:25:36,451 INFO L226 Difference]: Without dead ends: 28 [2024-10-13 22:25:36,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:25:36,452 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:25:36,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 56 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:25:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-13 22:25:36,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-10-13 22:25:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:25:36,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-10-13 22:25:36,458 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 25 [2024-10-13 22:25:36,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:25:36,458 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-10-13 22:25:36,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:36,459 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-10-13 22:25:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 22:25:36,460 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:25:36,460 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:25:36,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 22:25:36,460 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:25:36,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:25:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash -349300913, now seen corresponding path program 1 times [2024-10-13 22:25:36,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:25:36,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852534727] [2024-10-13 22:25:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:36,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:25:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:25:36,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708831562] [2024-10-13 22:25:36,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:36,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:36,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:25:36,517 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 22:25:36,520 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 22:25:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:36,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 22:25:36,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:25:36,891 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 22:25:36,897 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 9 [2024-10-13 22:25:37,026 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 22:25:37,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:25:37,133 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 33 treesize of output 31 [2024-10-13 22:25:37,138 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 31 treesize of output 29 [2024-10-13 22:25:37,147 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 49 treesize of output 47 [2024-10-13 22:25:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:25:37,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:25:37,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852534727] [2024-10-13 22:25:37,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 22:25:37,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708831562] [2024-10-13 22:25:37,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708831562] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:25:37,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 22:25:37,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2024-10-13 22:25:37,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403335880] [2024-10-13 22:25:37,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 22:25:37,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-13 22:25:37,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:25:37,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-13 22:25:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-10-13 22:25:37,594 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 20 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:25:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:25:38,322 INFO L93 Difference]: Finished difference Result 91 states and 117 transitions. [2024-10-13 22:25:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 22:25:38,323 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 20 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2024-10-13 22:25:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:25:38,324 INFO L225 Difference]: With dead ends: 91 [2024-10-13 22:25:38,324 INFO L226 Difference]: Without dead ends: 67 [2024-10-13 22:25:38,325 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2024-10-13 22:25:38,329 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 111 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 22:25:38,330 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 223 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 22:25:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-13 22:25:38,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 53. [2024-10-13 22:25:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-13 22:25:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-10-13 22:25:38,349 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 26 [2024-10-13 22:25:38,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:25:38,350 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-10-13 22:25:38,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 20 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:25:38,350 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-10-13 22:25:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-13 22:25:38,351 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:25:38,351 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:25:38,369 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 22:25:38,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:38,552 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:25:38,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:25:38,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1673359161, now seen corresponding path program 2 times [2024-10-13 22:25:38,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:25:38,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929518046] [2024-10-13 22:25:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:38,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:25:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:38,678 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:25:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:38,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-13 22:25:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:25:38,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:25:38,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929518046] [2024-10-13 22:25:38,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929518046] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:25:38,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308894986] [2024-10-13 22:25:38,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:25:38,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:38,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:25:38,696 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 22:25:38,697 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 22:25:38,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:25:38,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:25:38,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 22:25:38,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:25:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:25:38,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:25:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:25:38,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308894986] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:25:38,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:25:38,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-13 22:25:38,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766306793] [2024-10-13 22:25:38,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:25:38,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 22:25:38,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:25:38,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 22:25:38,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-13 22:25:38,880 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:25:39,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:25:39,107 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2024-10-13 22:25:39,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 22:25:39,107 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-10-13 22:25:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:25:39,108 INFO L225 Difference]: With dead ends: 84 [2024-10-13 22:25:39,108 INFO L226 Difference]: Without dead ends: 67 [2024-10-13 22:25:39,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-10-13 22:25:39,113 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:25:39,113 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 105 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:25:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-13 22:25:39,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2024-10-13 22:25:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-13 22:25:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-10-13 22:25:39,129 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 27 [2024-10-13 22:25:39,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:25:39,130 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-10-13 22:25:39,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:25:39,130 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-10-13 22:25:39,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-13 22:25:39,133 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:25:39,133 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:25:39,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 22:25:39,333 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,SelfDestructingSolverStorable5 [2024-10-13 22:25:39,334 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:25:39,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:25:39,335 INFO L85 PathProgramCache]: Analyzing trace with hash -307985526, now seen corresponding path program 3 times [2024-10-13 22:25:39,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:25:39,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175336736] [2024-10-13 22:25:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:39,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:25:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:25:39,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447880208] [2024-10-13 22:25:39,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:25:39,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:39,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:25:39,371 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 22:25:39,374 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 22:25:39,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 22:25:39,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:25:39,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-13 22:25:39,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:25:39,507 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 22:25:39,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 22:25:39,565 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 19 treesize of output 18 [2024-10-13 22:25:39,574 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 19 treesize of output 18 [2024-10-13 22:25:40,106 INFO L349 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2024-10-13 22:25:40,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 68 [2024-10-13 22:25:40,167 INFO L349 Elim1Store]: treesize reduction 80, result has 36.0 percent of original size [2024-10-13 22:25:40,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 66 [2024-10-13 22:25:40,976 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:40,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 117 [2024-10-13 22:25:40,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:40,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 86 [2024-10-13 22:25:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:25:41,149 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:25:41,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:25:41,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175336736] [2024-10-13 22:25:41,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 22:25:41,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447880208] [2024-10-13 22:25:41,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447880208] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:25:41,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:25:41,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-13 22:25:41,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328453224] [2024-10-13 22:25:41,518 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-13 22:25:41,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 22:25:41,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:25:41,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 22:25:41,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-10-13 22:25:41,520 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:41,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:25:41,921 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2024-10-13 22:25:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-13 22:25:41,922 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-10-13 22:25:41,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:25:41,924 INFO L225 Difference]: With dead ends: 81 [2024-10-13 22:25:41,924 INFO L226 Difference]: Without dead ends: 77 [2024-10-13 22:25:41,924 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2024-10-13 22:25:41,925 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:25:41,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 167 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:25:41,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-13 22:25:41,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2024-10-13 22:25:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 58 states have internal predecessors, (71), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-13 22:25:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-10-13 22:25:41,946 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 28 [2024-10-13 22:25:41,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:25:41,947 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-10-13 22:25:41,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-10-13 22:25:41,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-13 22:25:41,949 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:25:41,949 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:25:41,967 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 22:25:42,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:42,150 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:25:42,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:25:42,150 INFO L85 PathProgramCache]: Analyzing trace with hash 393079052, now seen corresponding path program 1 times [2024-10-13 22:25:42,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:25:42,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750483940] [2024-10-13 22:25:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:42,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:25:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:25:42,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470974239] [2024-10-13 22:25:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:42,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:42,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:25:42,188 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 22:25:42,190 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 22:25:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:42,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-13 22:25:42,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:25:42,301 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 22:25:42,309 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 22:25:42,339 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 19 treesize of output 18 [2024-10-13 22:25:42,351 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 19 treesize of output 18 [2024-10-13 22:25:42,723 INFO L349 Elim1Store]: treesize reduction 80, result has 36.0 percent of original size [2024-10-13 22:25:42,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 66 [2024-10-13 22:25:42,771 INFO L349 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2024-10-13 22:25:42,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 68 [2024-10-13 22:25:43,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:43,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 109 [2024-10-13 22:25:43,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:43,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 80 [2024-10-13 22:25:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:25:43,429 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:25:44,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:25:44,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750483940] [2024-10-13 22:25:44,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 22:25:44,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470974239] [2024-10-13 22:25:44,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470974239] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:25:44,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:25:44,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-13 22:25:44,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575468239] [2024-10-13 22:25:44,148 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-13 22:25:44,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 22:25:44,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:25:44,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 22:25:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2024-10-13 22:25:44,150 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:44,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:25:44,390 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2024-10-13 22:25:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-13 22:25:44,391 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-10-13 22:25:44,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:25:44,392 INFO L225 Difference]: With dead ends: 85 [2024-10-13 22:25:44,392 INFO L226 Difference]: Without dead ends: 81 [2024-10-13 22:25:44,393 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-10-13 22:25:44,393 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 17 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:25:44,394 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 170 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:25:44,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-13 22:25:44,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2024-10-13 22:25:44,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 58 states have internal predecessors, (71), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-13 22:25:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-10-13 22:25:44,405 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 28 [2024-10-13 22:25:44,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:25:44,406 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-10-13 22:25:44,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-10-13 22:25:44,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-13 22:25:44,407 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:25:44,407 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:25:44,420 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 22:25:44,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:44,607 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:25:44,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:25:44,608 INFO L85 PathProgramCache]: Analyzing trace with hash -931075801, now seen corresponding path program 4 times [2024-10-13 22:25:44,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:25:44,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543040240] [2024-10-13 22:25:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:44,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:25:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:44,716 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:25:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:44,719 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-13 22:25:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:25:44,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:25:44,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543040240] [2024-10-13 22:25:44,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543040240] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:25:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982856148] [2024-10-13 22:25:44,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:25:44,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:44,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:25:44,726 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 22:25:44,728 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 22:25:44,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:25:44,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:25:44,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:25:44,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:25:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:25:44,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:25:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:25:44,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982856148] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:25:44,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:25:44,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-13 22:25:44,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172605537] [2024-10-13 22:25:44,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:25:44,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 22:25:44,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:25:44,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 22:25:44,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:25:44,925 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:25:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:25:45,101 INFO L93 Difference]: Finished difference Result 178 states and 224 transitions. [2024-10-13 22:25:45,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 22:25:45,102 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2024-10-13 22:25:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:25:45,103 INFO L225 Difference]: With dead ends: 178 [2024-10-13 22:25:45,103 INFO L226 Difference]: Without dead ends: 134 [2024-10-13 22:25:45,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 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 22:25:45,105 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:25:45,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 116 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:25:45,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-13 22:25:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 120. [2024-10-13 22:25:45,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 100 states have (on average 1.25) internal successors, (125), 100 states have internal predecessors, (125), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-13 22:25:45,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 151 transitions. [2024-10-13 22:25:45,137 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 151 transitions. Word has length 29 [2024-10-13 22:25:45,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:25:45,137 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 151 transitions. [2024-10-13 22:25:45,137 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:25:45,137 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 151 transitions. [2024-10-13 22:25:45,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-13 22:25:45,138 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:25:45,138 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:25:45,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 22:25:45,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:45,339 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:25:45,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:25:45,340 INFO L85 PathProgramCache]: Analyzing trace with hash -970695505, now seen corresponding path program 5 times [2024-10-13 22:25:45,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:25:45,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247084423] [2024-10-13 22:25:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:45,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:25:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:25:45,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027819864] [2024-10-13 22:25:45,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:25:45,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:45,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:25:45,376 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 22:25:45,380 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 22:25:45,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 22:25:45,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:25:45,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-10-13 22:25:45,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:25:45,509 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 22:25:45,516 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 22:25:45,542 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 19 treesize of output 18 [2024-10-13 22:25:45,548 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 19 treesize of output 18 [2024-10-13 22:25:45,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:45,592 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 26 treesize of output 28 [2024-10-13 22:25:45,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:45,604 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 26 treesize of output 28 [2024-10-13 22:25:46,077 INFO L349 Elim1Store]: treesize reduction 132, result has 33.7 percent of original size [2024-10-13 22:25:46,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 96 [2024-10-13 22:25:46,151 INFO L349 Elim1Store]: treesize reduction 120, result has 35.8 percent of original size [2024-10-13 22:25:46,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 94 [2024-10-13 22:25:47,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:47,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 178 [2024-10-13 22:25:47,135 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:47,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 157 treesize of output 123 [2024-10-13 22:25:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:25:47,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:25:47,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:25:47,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247084423] [2024-10-13 22:25:47,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 22:25:47,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027819864] [2024-10-13 22:25:47,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027819864] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:25:47,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:25:47,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-10-13 22:25:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809020265] [2024-10-13 22:25:47,864 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-13 22:25:47,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 22:25:47,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:25:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 22:25:47,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2024-10-13 22:25:47,865 INFO L87 Difference]: Start difference. First operand 120 states and 151 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:48,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:25:48,619 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2024-10-13 22:25:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-13 22:25:48,620 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-10-13 22:25:48,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:25:48,621 INFO L225 Difference]: With dead ends: 136 [2024-10-13 22:25:48,621 INFO L226 Difference]: Without dead ends: 132 [2024-10-13 22:25:48,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2024-10-13 22:25:48,622 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:25:48,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 179 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:25:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-10-13 22:25:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2024-10-13 22:25:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 105 states have internal predecessors, (131), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-13 22:25:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 157 transitions. [2024-10-13 22:25:48,642 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 157 transitions. Word has length 30 [2024-10-13 22:25:48,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:25:48,642 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 157 transitions. [2024-10-13 22:25:48,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 157 transitions. [2024-10-13 22:25:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-13 22:25:48,644 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:25:48,644 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:25:48,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 22:25:48,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:48,845 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:25:48,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:25:48,845 INFO L85 PathProgramCache]: Analyzing trace with hash -712530067, now seen corresponding path program 2 times [2024-10-13 22:25:48,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:25:48,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086336816] [2024-10-13 22:25:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:48,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:25:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:25:48,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057792172] [2024-10-13 22:25:48,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:25:48,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:48,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:25:48,891 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 22:25:48,892 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 22:25:48,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:25:48,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:25:48,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-10-13 22:25:48,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:25:49,008 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 22:25:49,018 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 22:25:49,050 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 19 treesize of output 18 [2024-10-13 22:25:49,063 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 19 treesize of output 18 [2024-10-13 22:25:49,104 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:49,105 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 26 treesize of output 28 [2024-10-13 22:25:49,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:49,117 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 26 treesize of output 28 [2024-10-13 22:25:49,554 INFO L349 Elim1Store]: treesize reduction 120, result has 35.8 percent of original size [2024-10-13 22:25:49,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 94 [2024-10-13 22:25:49,621 INFO L349 Elim1Store]: treesize reduction 132, result has 33.7 percent of original size [2024-10-13 22:25:49,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 96 [2024-10-13 22:25:50,637 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:50,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 219 treesize of output 185 [2024-10-13 22:25:50,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:50,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 136 [2024-10-13 22:25:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:25:51,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:25:56,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:25:56,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086336816] [2024-10-13 22:25:56,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 22:25:56,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057792172] [2024-10-13 22:25:56,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057792172] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:25:56,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:25:56,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-13 22:25:56,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828593019] [2024-10-13 22:25:56,464 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-13 22:25:56,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 22:25:56,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:25:56,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 22:25:56,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2024-10-13 22:25:56,465 INFO L87 Difference]: Start difference. First operand 125 states and 157 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:25:57,202 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2024-10-13 22:25:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 22:25:57,202 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-10-13 22:25:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:25:57,203 INFO L225 Difference]: With dead ends: 140 [2024-10-13 22:25:57,203 INFO L226 Difference]: Without dead ends: 136 [2024-10-13 22:25:57,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2024-10-13 22:25:57,204 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 29 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:25:57,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 177 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:25:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-10-13 22:25:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 121. [2024-10-13 22:25:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 101 states have (on average 1.2475247524752475) internal successors, (126), 101 states have internal predecessors, (126), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-13 22:25:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 152 transitions. [2024-10-13 22:25:57,237 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 152 transitions. Word has length 30 [2024-10-13 22:25:57,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:25:57,238 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 152 transitions. [2024-10-13 22:25:57,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:25:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 152 transitions. [2024-10-13 22:25:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-13 22:25:57,241 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:25:57,242 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:25:57,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 22:25:57,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:57,443 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:25:57,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:25:57,443 INFO L85 PathProgramCache]: Analyzing trace with hash -248670, now seen corresponding path program 6 times [2024-10-13 22:25:57,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:25:57,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479185272] [2024-10-13 22:25:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:57,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:25:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:57,589 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:25:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:57,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-13 22:25:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:25:57,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:25:57,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479185272] [2024-10-13 22:25:57,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479185272] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:25:57,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319315301] [2024-10-13 22:25:57,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:25:57,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:57,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:25:57,597 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 22:25:57,598 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 22:25:57,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-13 22:25:57,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:25:57,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 22:25:57,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:25:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:25:57,773 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:25:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:25:57,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319315301] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:25:57,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:25:57,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-13 22:25:57,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247120141] [2024-10-13 22:25:57,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:25:57,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 22:25:57,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:25:57,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 22:25:57,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-13 22:25:57,844 INFO L87 Difference]: Start difference. First operand 121 states and 152 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:25:58,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:25:58,156 INFO L93 Difference]: Finished difference Result 288 states and 373 transitions. [2024-10-13 22:25:58,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 22:25:58,158 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-10-13 22:25:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:25:58,160 INFO L225 Difference]: With dead ends: 288 [2024-10-13 22:25:58,160 INFO L226 Difference]: Without dead ends: 205 [2024-10-13 22:25:58,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-10-13 22:25:58,161 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 130 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:25:58,163 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 160 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:25:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-10-13 22:25:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 183. [2024-10-13 22:25:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 153 states have (on average 1.2745098039215685) internal successors, (195), 153 states have internal predecessors, (195), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-10-13 22:25:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 237 transitions. [2024-10-13 22:25:58,197 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 237 transitions. Word has length 31 [2024-10-13 22:25:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:25:58,198 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 237 transitions. [2024-10-13 22:25:58,198 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:25:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 237 transitions. [2024-10-13 22:25:58,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-13 22:25:58,199 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:25:58,199 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:25:58,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 22:25:58,399 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,SelfDestructingSolverStorable11 [2024-10-13 22:25:58,400 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:25:58,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:25:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash 579921450, now seen corresponding path program 7 times [2024-10-13 22:25:58,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:25:58,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059971190] [2024-10-13 22:25:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:25:58,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:25:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:25:58,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206963751] [2024-10-13 22:25:58,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 22:25:58,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:25:58,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:25:58,426 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 22:25:58,427 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 22:25:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:25:58,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-10-13 22:25:58,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:25:58,543 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 22:25:58,548 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 22:25:58,585 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 19 treesize of output 18 [2024-10-13 22:25:58,598 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 19 treesize of output 18 [2024-10-13 22:25:58,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:58,634 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 26 treesize of output 28 [2024-10-13 22:25:58,651 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:58,651 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 26 treesize of output 28 [2024-10-13 22:25:58,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:58,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-10-13 22:25:58,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:25:58,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-10-13 22:25:59,283 INFO L349 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2024-10-13 22:25:59,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 122 [2024-10-13 22:25:59,372 INFO L349 Elim1Store]: treesize reduction 176, result has 33.6 percent of original size [2024-10-13 22:25:59,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 124 [2024-10-13 22:26:01,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:26:01,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 325 treesize of output 263 [2024-10-13 22:26:01,165 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:26:01,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 236 treesize of output 182 [2024-10-13 22:26:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:26:02,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:26:21,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:26:21,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059971190] [2024-10-13 22:26:21,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 22:26:21,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206963751] [2024-10-13 22:26:21,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206963751] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:26:21,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:26:21,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-10-13 22:26:21,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739168428] [2024-10-13 22:26:21,717 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-13 22:26:21,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 22:26:21,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:26:21,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 22:26:21,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=539, Unknown=2, NotChecked=0, Total=650 [2024-10-13 22:26:21,718 INFO L87 Difference]: Start difference. First operand 183 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:26:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:26:22,116 INFO L93 Difference]: Finished difference Result 200 states and 257 transitions. [2024-10-13 22:26:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 22:26:22,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2024-10-13 22:26:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:26:22,118 INFO L225 Difference]: With dead ends: 200 [2024-10-13 22:26:22,118 INFO L226 Difference]: Without dead ends: 196 [2024-10-13 22:26:22,119 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=109, Invalid=539, Unknown=2, NotChecked=0, Total=650 [2024-10-13 22:26:22,119 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 22:26:22,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 179 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 22:26:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-10-13 22:26:22,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 188. [2024-10-13 22:26:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 158 states have (on average 1.2721518987341771) internal successors, (201), 158 states have internal predecessors, (201), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-10-13 22:26:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 243 transitions. [2024-10-13 22:26:22,155 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 243 transitions. Word has length 32 [2024-10-13 22:26:22,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:26:22,155 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 243 transitions. [2024-10-13 22:26:22,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:26:22,156 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 243 transitions. [2024-10-13 22:26:22,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-13 22:26:22,156 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:26:22,157 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:26:22,174 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 22:26:22,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 22:26:22,361 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:26:22,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:26:22,361 INFO L85 PathProgramCache]: Analyzing trace with hash -6884564, now seen corresponding path program 3 times [2024-10-13 22:26:22,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:26:22,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912306462] [2024-10-13 22:26:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:26:22,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:26:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:26:22,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108324896] [2024-10-13 22:26:22,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:26:22,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:26:22,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:26:22,438 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 22:26:22,442 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 22:26:22,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-13 22:26:22,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:26:22,534 WARN L253 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-10-13 22:26:22,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:26:22,578 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 22:26:22,582 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 22:26:22,610 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 19 treesize of output 18 [2024-10-13 22:26:22,618 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 19 treesize of output 18 [2024-10-13 22:26:22,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:26:22,659 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 26 treesize of output 28 [2024-10-13 22:26:22,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:26:22,677 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 26 treesize of output 28 [2024-10-13 22:26:22,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:22,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:22,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:22,730 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:26:22,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 40 [2024-10-13 22:26:22,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:22,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:22,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:22,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:26:22,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 40 [2024-10-13 22:26:23,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:23,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:23,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:23,449 INFO L349 Elim1Store]: treesize reduction 174, result has 36.3 percent of original size [2024-10-13 22:26:23,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 78 treesize of output 132 [2024-10-13 22:26:23,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:23,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:23,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:23,619 INFO L349 Elim1Store]: treesize reduction 190, result has 34.3 percent of original size [2024-10-13 22:26:23,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 78 treesize of output 134 [2024-10-13 22:26:25,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:25,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:25,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:25,655 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:26:25,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 366 treesize of output 314 [2024-10-13 22:26:25,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:25,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:25,700 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:26:25,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 299 treesize of output 215 [2024-10-13 22:26:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:26:27,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:26:34,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:26:34,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912306462] [2024-10-13 22:26:34,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 22:26:34,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108324896] [2024-10-13 22:26:34,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108324896] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:26:34,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:26:34,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-10-13 22:26:34,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203361180] [2024-10-13 22:26:34,375 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-13 22:26:34,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-13 22:26:34,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:26:34,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-13 22:26:34,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=891, Unknown=1, NotChecked=0, Total=1056 [2024-10-13 22:26:34,377 INFO L87 Difference]: Start difference. First operand 188 states and 243 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:26:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:26:35,298 INFO L93 Difference]: Finished difference Result 201 states and 258 transitions. [2024-10-13 22:26:35,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 22:26:35,299 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2024-10-13 22:26:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:26:35,300 INFO L225 Difference]: With dead ends: 201 [2024-10-13 22:26:35,300 INFO L226 Difference]: Without dead ends: 197 [2024-10-13 22:26:35,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=223, Invalid=1258, Unknown=1, NotChecked=0, Total=1482 [2024-10-13 22:26:35,301 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-13 22:26:35,301 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 304 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-13 22:26:35,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-10-13 22:26:35,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 184. [2024-10-13 22:26:35,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 154 states have (on average 1.2727272727272727) internal successors, (196), 154 states have internal predecessors, (196), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-10-13 22:26:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2024-10-13 22:26:35,339 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 238 transitions. Word has length 32 [2024-10-13 22:26:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:26:35,339 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 238 transitions. [2024-10-13 22:26:35,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:26:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 238 transitions. [2024-10-13 22:26:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-13 22:26:35,340 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:26:35,340 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:26:35,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-13 22:26:35,541 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,SelfDestructingSolverStorable13 [2024-10-13 22:26:35,541 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:26:35,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:26:35,542 INFO L85 PathProgramCache]: Analyzing trace with hash 824236679, now seen corresponding path program 8 times [2024-10-13 22:26:35,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:26:35,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436094124] [2024-10-13 22:26:35,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:26:35,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:26:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:26:35,722 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:26:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:26:35,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-13 22:26:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:26:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:26:35,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:26:35,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436094124] [2024-10-13 22:26:35,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436094124] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:26:35,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050087085] [2024-10-13 22:26:35,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:26:35,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:26:35,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:26:35,730 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 22:26:35,731 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 22:26:35,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:26:35,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:26:35,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 22:26:35,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:26:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:26:35,907 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:26:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:26:35,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050087085] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:26:35,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:26:35,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-10-13 22:26:35,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91348183] [2024-10-13 22:26:35,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:26:35,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 22:26:35,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:26:35,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 22:26:35,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-10-13 22:26:35,992 INFO L87 Difference]: Start difference. First operand 184 states and 238 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:26:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:26:36,362 INFO L93 Difference]: Finished difference Result 425 states and 563 transitions. [2024-10-13 22:26:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 22:26:36,363 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-10-13 22:26:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:26:36,364 INFO L225 Difference]: With dead ends: 425 [2024-10-13 22:26:36,364 INFO L226 Difference]: Without dead ends: 291 [2024-10-13 22:26:36,365 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 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 22:26:36,366 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 182 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:26:36,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 170 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:26:36,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2024-10-13 22:26:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 258. [2024-10-13 22:26:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 216 states have (on average 1.2916666666666667) internal successors, (279), 216 states have internal predecessors, (279), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-10-13 22:26:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 341 transitions. [2024-10-13 22:26:36,411 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 341 transitions. Word has length 33 [2024-10-13 22:26:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:26:36,412 INFO L471 AbstractCegarLoop]: Abstraction has 258 states and 341 transitions. [2024-10-13 22:26:36,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:26:36,412 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 341 transitions. [2024-10-13 22:26:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-13 22:26:36,413 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:26:36,413 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:26:36,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-13 22:26:36,614 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,SelfDestructingSolverStorable14 [2024-10-13 22:26:36,614 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:26:36,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:26:36,615 INFO L85 PathProgramCache]: Analyzing trace with hash 21973519, now seen corresponding path program 9 times [2024-10-13 22:26:36,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:26:36,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223151014] [2024-10-13 22:26:36,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:26:36,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:26:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:26:36,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268264232] [2024-10-13 22:26:36,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:26:36,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:26:36,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:26:36,676 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 22:26:36,678 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 22:26:36,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-13 22:26:36,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:26:36,789 WARN L253 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-10-13 22:26:36,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:26:36,827 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 22:26:36,838 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 22:26:36,865 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 19 treesize of output 18 [2024-10-13 22:26:36,871 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 19 treesize of output 18 [2024-10-13 22:26:36,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:26:36,922 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 26 treesize of output 28 [2024-10-13 22:26:36,936 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:26:36,936 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 26 treesize of output 28 [2024-10-13 22:26:36,999 INFO L349 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2024-10-13 22:26:36,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 42 [2024-10-13 22:26:37,032 INFO L349 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2024-10-13 22:26:37,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 42 [2024-10-13 22:26:37,127 INFO L349 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2024-10-13 22:26:37,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 46 treesize of output 54 [2024-10-13 22:26:37,161 INFO L349 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2024-10-13 22:26:37,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 46 treesize of output 54 [2024-10-13 22:26:38,016 INFO L349 Elim1Store]: treesize reduction 488, result has 21.2 percent of original size [2024-10-13 22:26:38,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 100 treesize of output 172 [2024-10-13 22:26:38,212 INFO L349 Elim1Store]: treesize reduction 468, result has 21.9 percent of original size [2024-10-13 22:26:38,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 100 treesize of output 170 [2024-10-13 22:26:42,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:42,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:42,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:42,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:42,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:42,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:42,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:42,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:26:42,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 513 treesize of output 451 [2024-10-13 22:26:42,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:42,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:42,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:42,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:42,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:42,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:42,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:26:42,414 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:26:42,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 442 treesize of output 304 [2024-10-13 22:26:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:26:51,941 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:27:00,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:27:00,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223151014] [2024-10-13 22:27:00,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 22:27:00,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268264232] [2024-10-13 22:27:00,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268264232] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:27:00,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:27:00,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-10-13 22:27:00,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963228039] [2024-10-13 22:27:00,574 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-13 22:27:00,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-13 22:27:00,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:27:00,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-13 22:27:00,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1070, Unknown=2, NotChecked=0, Total=1260 [2024-10-13 22:27:00,575 INFO L87 Difference]: Start difference. First operand 258 states and 341 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:27:01,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:27:01,526 INFO L93 Difference]: Finished difference Result 288 states and 378 transitions. [2024-10-13 22:27:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 22:27:01,527 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2024-10-13 22:27:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:27:01,529 INFO L225 Difference]: With dead ends: 288 [2024-10-13 22:27:01,529 INFO L226 Difference]: Without dead ends: 284 [2024-10-13 22:27:01,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=233, Invalid=1405, Unknown=2, NotChecked=0, Total=1640 [2024-10-13 22:27:01,531 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-13 22:27:01,531 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 201 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-13 22:27:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-10-13 22:27:01,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 263. [2024-10-13 22:27:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 221 states have (on average 1.2895927601809956) internal successors, (285), 221 states have internal predecessors, (285), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-10-13 22:27:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 347 transitions. [2024-10-13 22:27:01,591 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 347 transitions. Word has length 34 [2024-10-13 22:27:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:27:01,592 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 347 transitions. [2024-10-13 22:27:01,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:27:01,592 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 347 transitions. [2024-10-13 22:27:01,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-13 22:27:01,593 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:27:01,593 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:27:01,606 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 22:27:01,793 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,SelfDestructingSolverStorable15 [2024-10-13 22:27:01,794 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:27:01,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:27:01,794 INFO L85 PathProgramCache]: Analyzing trace with hash -989143731, now seen corresponding path program 4 times [2024-10-13 22:27:01,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:27:01,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424545079] [2024-10-13 22:27:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:27:01,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:27:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:27:01,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977871813] [2024-10-13 22:27:01,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:27:01,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:27:01,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:27:01,845 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 22:27:01,847 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 22:27:02,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:27:02,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:27:02,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-10-13 22:27:02,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:27:02,076 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 22:27:02,082 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 22:27:02,119 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 19 treesize of output 18 [2024-10-13 22:27:02,132 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 19 treesize of output 18 [2024-10-13 22:27:02,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:27:02,167 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 26 treesize of output 28 [2024-10-13 22:27:02,177 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:27:02,177 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 26 treesize of output 28 [2024-10-13 22:27:02,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:27:02,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-10-13 22:27:02,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:27:02,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-10-13 22:27:02,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:27:02,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2024-10-13 22:27:02,356 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:27:02,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2024-10-13 22:27:02,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:27:02,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:27:02,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:27:02,843 INFO L349 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2024-10-13 22:27:02,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 53 treesize of output 82 [2024-10-13 22:27:02,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:27:02,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:27:02,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:27:02,878 INFO L349 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2024-10-13 22:27:02,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 53 treesize of output 80 [2024-10-13 22:27:04,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:27:04,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 170 treesize of output 176 [2024-10-13 22:27:04,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:27:04,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 135 treesize of output 145 [2024-10-13 22:27:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:27:04,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:27:04,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:27:04,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424545079] [2024-10-13 22:27:04,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 22:27:04,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977871813] [2024-10-13 22:27:04,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977871813] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:27:04,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:27:04,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-10-13 22:27:04,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350437477] [2024-10-13 22:27:04,851 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-13 22:27:04,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 22:27:04,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:27:04,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 22:27:04,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2024-10-13 22:27:04,852 INFO L87 Difference]: Start difference. First operand 263 states and 347 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:27:05,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:27:05,498 INFO L93 Difference]: Finished difference Result 295 states and 384 transitions. [2024-10-13 22:27:05,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-13 22:27:05,498 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2024-10-13 22:27:05,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:27:05,500 INFO L225 Difference]: With dead ends: 295 [2024-10-13 22:27:05,500 INFO L226 Difference]: Without dead ends: 291 [2024-10-13 22:27:05,500 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2024-10-13 22:27:05,501 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 33 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 22:27:05,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 201 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 22:27:05,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2024-10-13 22:27:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 272. [2024-10-13 22:27:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 228 states have (on average 1.2894736842105263) internal successors, (294), 228 states have internal predecessors, (294), 32 states have call successors, (32), 11 states have call predecessors, (32), 11 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-10-13 22:27:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 358 transitions. [2024-10-13 22:27:05,559 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 358 transitions. Word has length 34 [2024-10-13 22:27:05,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:27:05,559 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 358 transitions. [2024-10-13 22:27:05,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 22:27:05,560 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 358 transitions. [2024-10-13 22:27:05,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-13 22:27:05,561 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:27:05,561 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:27:05,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-13 22:27:05,761 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,SelfDestructingSolverStorable16 [2024-10-13 22:27:05,761 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:27:05,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:27:05,762 INFO L85 PathProgramCache]: Analyzing trace with hash 707720002, now seen corresponding path program 10 times [2024-10-13 22:27:05,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:27:05,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246200547] [2024-10-13 22:27:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:27:05,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:27:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:27:06,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:27:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:27:06,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-13 22:27:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:27:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:27:06,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:27:06,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246200547] [2024-10-13 22:27:06,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246200547] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:27:06,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659936039] [2024-10-13 22:27:06,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:27:06,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:27:06,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:27:06,022 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 22:27:06,023 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 22:27:06,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:27:06,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:27:06,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 22:27:06,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:27:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:27:06,277 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:27:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:27:06,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659936039] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:27:06,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:27:06,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-13 22:27:06,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785457224] [2024-10-13 22:27:06,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:27:06,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-13 22:27:06,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:27:06,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-13 22:27:06,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-10-13 22:27:06,368 INFO L87 Difference]: Start difference. First operand 272 states and 358 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:27:06,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:27:06,776 INFO L93 Difference]: Finished difference Result 598 states and 803 transitions. [2024-10-13 22:27:06,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-13 22:27:06,776 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-10-13 22:27:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:27:06,780 INFO L225 Difference]: With dead ends: 598 [2024-10-13 22:27:06,780 INFO L226 Difference]: Without dead ends: 401 [2024-10-13 22:27:06,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-10-13 22:27:06,782 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 247 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:27:06,783 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 169 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:27:06,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2024-10-13 22:27:06,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 349. [2024-10-13 22:27:06,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 293 states have (on average 1.3037542662116042) internal successors, (382), 293 states have internal predecessors, (382), 43 states have call successors, (43), 12 states have call predecessors, (43), 12 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-10-13 22:27:06,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 468 transitions. [2024-10-13 22:27:06,851 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 468 transitions. Word has length 35 [2024-10-13 22:27:06,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:27:06,851 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 468 transitions. [2024-10-13 22:27:06,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:27:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 468 transitions. [2024-10-13 22:27:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-13 22:27:06,854 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:27:06,855 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:27:06,868 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 22:27:07,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:27:07,055 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:27:07,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:27:07,056 INFO L85 PathProgramCache]: Analyzing trace with hash -89497915, now seen corresponding path program 5 times [2024-10-13 22:27:07,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:27:07,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820489688] [2024-10-13 22:27:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:27:07,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:27:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:27:07,264 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:27:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:27:07,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-13 22:27:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:27:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:27:07,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:27:07,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820489688] [2024-10-13 22:27:07,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820489688] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:27:07,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960863936] [2024-10-13 22:27:07,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:27:07,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:27:07,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:27:07,271 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 22:27:07,276 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 22:27:07,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-13 22:27:07,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:27:07,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 22:27:07,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:27:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:27:07,504 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:27:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:27:07,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960863936] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:27:07,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:27:07,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-13 22:27:07,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630914083] [2024-10-13 22:27:07,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:27:07,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-13 22:27:07,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:27:07,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-13 22:27:07,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-10-13 22:27:07,608 INFO L87 Difference]: Start difference. First operand 349 states and 468 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)