./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-crafted/bor1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor1.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 dc029b09d1398b404e1aee83359480f2bc7a4040f694547fb82d365d81b9786a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 22:05:50,598 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 22:05:50,653 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 22:05:50,660 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 22:05:50,660 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 22:05:50,692 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 22:05:50,694 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 22:05:50,694 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 22:05:50,695 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 22:05:50,695 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 22:05:50,695 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 22:05:50,696 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 22:05:50,696 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 22:05:50,707 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 22:05:50,707 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 22:05:50,707 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 22:05:50,708 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 22:05:50,708 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 22:05:50,708 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 22:05:50,708 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 22:05:50,711 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 22:05:50,712 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 22:05:50,712 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 22:05:50,712 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 22:05:50,713 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 22:05:50,713 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 22:05:50,713 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 22:05:50,713 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 22:05:50,714 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 22:05:50,714 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 22:05:50,715 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 22:05:50,715 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 22:05:50,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:05:50,715 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 22:05:50,715 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 22:05:50,715 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 22:05:50,715 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 22:05:50,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 22:05:50,716 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 22:05:50,716 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 22:05:50,716 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 22:05:50,716 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 22:05:50,716 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc029b09d1398b404e1aee83359480f2bc7a4040f694547fb82d365d81b9786a [2024-10-10 22:05:50,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 22:05:50,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 22:05:50,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 22:05:50,956 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 22:05:50,956 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 22:05:50,957 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor1.i [2024-10-10 22:05:52,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 22:05:52,492 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 22:05:52,493 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor1.i [2024-10-10 22:05:52,502 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/0a8891e6b/0f462affe8284b8d8c423991c5a5c1d5/FLAGb64851c97 [2024-10-10 22:05:52,895 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/0a8891e6b/0f462affe8284b8d8c423991c5a5c1d5 [2024-10-10 22:05:52,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 22:05:52,898 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 22:05:52,907 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 22:05:52,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 22:05:52,911 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 22:05:52,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:05:52" (1/1) ... [2024-10-10 22:05:52,915 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@789a1128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:52, skipping insertion in model container [2024-10-10 22:05:52,915 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:05:52" (1/1) ... [2024-10-10 22:05:52,951 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 22:05:53,106 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-crafted/bor1.i[1285,1298] [2024-10-10 22:05:53,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:05:53,123 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 22:05:53,143 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-crafted/bor1.i[1285,1298] [2024-10-10 22:05:53,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:05:53,159 INFO L204 MainTranslator]: Completed translation [2024-10-10 22:05:53,160 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:53 WrapperNode [2024-10-10 22:05:53,160 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 22:05:53,161 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 22:05:53,162 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 22:05:53,162 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 22:05:53,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:53" (1/1) ... [2024-10-10 22:05:53,173 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:53" (1/1) ... [2024-10-10 22:05:53,190 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2024-10-10 22:05:53,191 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 22:05:53,192 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 22:05:53,192 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 22:05:53,193 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 22:05:53,201 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:53" (1/1) ... [2024-10-10 22:05:53,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:53" (1/1) ... [2024-10-10 22:05:53,207 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:53" (1/1) ... [2024-10-10 22:05:53,225 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 7, 11]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 5 writes are split as follows [0, 0, 5]. [2024-10-10 22:05:53,226 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:53" (1/1) ... [2024-10-10 22:05:53,226 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:53" (1/1) ... [2024-10-10 22:05:53,231 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:53" (1/1) ... [2024-10-10 22:05:53,233 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:53" (1/1) ... [2024-10-10 22:05:53,234 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:53" (1/1) ... [2024-10-10 22:05:53,235 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:53" (1/1) ... [2024-10-10 22:05:53,236 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 22:05:53,237 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 22:05:53,237 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 22:05:53,238 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 22:05:53,238 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:53" (1/1) ... [2024-10-10 22:05:53,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:05:53,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:53,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 22:05:53,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 22:05:53,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 22:05:53,320 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2024-10-10 22:05:53,320 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2024-10-10 22:05:53,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 22:05:53,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 22:05:53,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-10 22:05:53,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 22:05:53,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 22:05:53,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 22:05:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-10 22:05:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 22:05:53,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 22:05:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 22:05:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 22:05:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-10 22:05:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 22:05:53,405 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 22:05:53,407 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 22:05:53,611 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-10-10 22:05:53,611 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 22:05:53,657 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 22:05:53,657 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-10 22:05:53,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:05:53 BoogieIcfgContainer [2024-10-10 22:05:53,658 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 22:05:53,660 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 22:05:53,660 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 22:05:53,662 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 22:05:53,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 10:05:52" (1/3) ... [2024-10-10 22:05:53,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747f042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:05:53, skipping insertion in model container [2024-10-10 22:05:53,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:53" (2/3) ... [2024-10-10 22:05:53,665 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747f042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:05:53, skipping insertion in model container [2024-10-10 22:05:53,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:05:53" (3/3) ... [2024-10-10 22:05:53,667 INFO L112 eAbstractionObserver]: Analyzing ICFG bor1.i [2024-10-10 22:05:53,681 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 22:05:53,681 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 22:05:53,743 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 22:05:53,751 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;@702849b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 22:05:53,751 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 22:05:53,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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) [2024-10-10 22:05:53,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-10 22:05:53,763 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:53,764 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:53,765 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:53,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:53,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1288412435, now seen corresponding path program 1 times [2024-10-10 22:05:53,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:53,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614082688] [2024-10-10 22:05:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:53,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:54,069 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-10 22:05:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:54,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-10 22:05:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:54,120 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-10 22:05:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:05:54,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:54,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614082688] [2024-10-10 22:05:54,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614082688] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:54,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439908813] [2024-10-10 22:05:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:54,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:54,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:54,149 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:05:54,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 22:05:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:54,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 22:05:54,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-10 22:05:54,267 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 22:05:54,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439908813] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:05:54,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:05:54,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-10-10 22:05:54,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770028455] [2024-10-10 22:05:54,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:05:54,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:05:54,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:05:54,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:05:54,299 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-10 22:05:54,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:54,339 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2024-10-10 22:05:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:05:54,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-10-10 22:05:54,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:54,347 INFO L225 Difference]: With dead ends: 47 [2024-10-10 22:05:54,348 INFO L226 Difference]: Without dead ends: 23 [2024-10-10 22:05:54,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:05:54,358 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:54,361 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-10 22:05:54,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-10 22:05:54,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2024-10-10 22:05:54,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2024-10-10 22:05:54,416 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 25 [2024-10-10 22:05:54,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:54,416 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2024-10-10 22:05:54,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-10 22:05:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2024-10-10 22:05:54,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-10 22:05:54,421 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:54,422 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:54,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-10 22:05:54,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-10 22:05:54,623 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:54,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:54,624 INFO L85 PathProgramCache]: Analyzing trace with hash 794330975, now seen corresponding path program 1 times [2024-10-10 22:05:54,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:54,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328781856] [2024-10-10 22:05:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:54,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:54,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 22:05:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:54,841 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-10 22:05:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:54,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-10 22:05:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:05:54,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:54,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328781856] [2024-10-10 22:05:54,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328781856] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:54,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227688846] [2024-10-10 22:05:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:54,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:54,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:54,864 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:05:54,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 22:05:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:54,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 22:05:54,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-10 22:05:54,939 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 22:05:54,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227688846] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:05:54,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:05:54,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2024-10-10 22:05:54,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050540137] [2024-10-10 22:05:54,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:05:54,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:05:54,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:54,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:05:54,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:05:54,941 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:05:54,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:54,956 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2024-10-10 22:05:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:05:54,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-10-10 22:05:54,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:54,958 INFO L225 Difference]: With dead ends: 46 [2024-10-10 22:05:54,958 INFO L226 Difference]: Without dead ends: 28 [2024-10-10 22:05:54,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:05:54,959 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:54,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 42 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-10 22:05:54,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2024-10-10 22:05:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2024-10-10 22:05:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-10-10 22:05:54,963 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 26 [2024-10-10 22:05:54,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:54,965 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-10-10 22:05:54,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:05:54,965 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-10-10 22:05:54,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-10 22:05:54,966 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:54,966 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:54,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-10 22:05:55,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:55,167 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:55,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:55,168 INFO L85 PathProgramCache]: Analyzing trace with hash -131171604, now seen corresponding path program 1 times [2024-10-10 22:05:55,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:55,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137819690] [2024-10-10 22:05:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:55,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:55,256 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 22:05:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:55,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:05:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:55,269 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-10 22:05:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-10 22:05:55,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:55,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137819690] [2024-10-10 22:05:55,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137819690] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:55,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976465525] [2024-10-10 22:05:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:55,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:55,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:55,298 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:05:55,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 22:05:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:55,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 22:05:55,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-10 22:05:55,394 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 22:05:55,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976465525] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:05:55,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:05:55,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-10-10 22:05:55,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211602718] [2024-10-10 22:05:55,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:05:55,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:05:55,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:55,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:05:55,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-10 22:05:55,396 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2024-10-10 22:05:55,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:55,416 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2024-10-10 22:05:55,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:05:55,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 [2024-10-10 22:05:55,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:55,417 INFO L225 Difference]: With dead ends: 40 [2024-10-10 22:05:55,417 INFO L226 Difference]: Without dead ends: 25 [2024-10-10 22:05:55,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-10 22:05:55,418 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 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 [2024-10-10 22:05:55,418 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-10 22:05:55,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-10 22:05:55,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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) [2024-10-10 22:05:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-10-10 22:05:55,427 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 35 [2024-10-10 22:05:55,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:55,429 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-10-10 22:05:55,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2024-10-10 22:05:55,429 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-10-10 22:05:55,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-10 22:05:55,430 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:55,430 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:55,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-10 22:05:55,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:55,632 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:55,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:55,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1415382448, now seen corresponding path program 1 times [2024-10-10 22:05:55,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:55,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584091428] [2024-10-10 22:05:55,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:55,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:55,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 22:05:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:55,723 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:05:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:55,730 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-10 22:05:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-10 22:05:55,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:55,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584091428] [2024-10-10 22:05:55,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584091428] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:55,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349750124] [2024-10-10 22:05:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:55,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:55,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:55,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:05:55,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 22:05:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:55,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-10 22:05:55,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-10 22:05:55,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:05:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-10 22:05:55,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349750124] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:05:55,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:05:55,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2024-10-10 22:05:55,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575799429] [2024-10-10 22:05:55,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:05:55,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-10 22:05:55,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:55,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-10 22:05:55,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-10 22:05:55,899 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:05:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:55,936 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2024-10-10 22:05:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-10 22:05:55,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2024-10-10 22:05:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:55,937 INFO L225 Difference]: With dead ends: 59 [2024-10-10 22:05:55,937 INFO L226 Difference]: Without dead ends: 37 [2024-10-10 22:05:55,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-10 22:05:55,939 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:55,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 127 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-10 22:05:55,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2024-10-10 22:05:55,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 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) [2024-10-10 22:05:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-10-10 22:05:55,948 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 36 [2024-10-10 22:05:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:55,948 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-10-10 22:05:55,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:05:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-10-10 22:05:55,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-10 22:05:55,949 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:55,949 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:55,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-10 22:05:56,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:56,150 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:56,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:56,151 INFO L85 PathProgramCache]: Analyzing trace with hash -451932245, now seen corresponding path program 2 times [2024-10-10 22:05:56,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:56,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311339255] [2024-10-10 22:05:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:56,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:56,243 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-10 22:05:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:56,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-10 22:05:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:56,260 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-10 22:05:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-10-10 22:05:56,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:56,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311339255] [2024-10-10 22:05:56,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311339255] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:56,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830665148] [2024-10-10 22:05:56,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:05:56,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:56,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:56,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:05:56,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 22:05:56,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:05:56,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:05:56,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 22:05:56,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-10 22:05:56,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:05:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-10 22:05:56,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830665148] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:05:56,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:05:56,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2024-10-10 22:05:56,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963788142] [2024-10-10 22:05:56,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:05:56,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 22:05:56,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:56,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 22:05:56,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:05:56,475 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-10 22:05:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:56,520 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2024-10-10 22:05:56,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-10 22:05:56,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2024-10-10 22:05:56,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:56,521 INFO L225 Difference]: With dead ends: 67 [2024-10-10 22:05:56,521 INFO L226 Difference]: Without dead ends: 40 [2024-10-10 22:05:56,521 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:05:56,522 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:56,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 147 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:56,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-10 22:05:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-10-10 22:05:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 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) [2024-10-10 22:05:56,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-10-10 22:05:56,526 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 48 [2024-10-10 22:05:56,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:56,527 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-10-10 22:05:56,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-10 22:05:56,527 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-10-10 22:05:56,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-10 22:05:56,528 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:56,528 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:56,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-10 22:05:56,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:56,733 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:56,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:56,734 INFO L85 PathProgramCache]: Analyzing trace with hash -835342797, now seen corresponding path program 3 times [2024-10-10 22:05:56,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:56,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971911887] [2024-10-10 22:05:56,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:56,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:56,802 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:05:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:56,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-10 22:05:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:56,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-10 22:05:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-10 22:05:56,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:56,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971911887] [2024-10-10 22:05:56,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971911887] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:56,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16878849] [2024-10-10 22:05:56,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:05:56,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:56,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:56,836 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:05:56,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 22:05:56,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-10 22:05:56,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:05:56,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-10 22:05:56,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-10 22:05:56,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:05:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-10-10 22:05:56,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16878849] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:05:56,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:05:56,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-10 22:05:56,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36874095] [2024-10-10 22:05:56,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:05:56,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-10 22:05:56,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:56,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-10 22:05:56,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-10 22:05:56,973 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:05:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:57,004 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2024-10-10 22:05:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-10 22:05:57,005 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2024-10-10 22:05:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:57,006 INFO L225 Difference]: With dead ends: 79 [2024-10-10 22:05:57,006 INFO L226 Difference]: Without dead ends: 53 [2024-10-10 22:05:57,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-10 22:05:57,007 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:57,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 86 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:57,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-10 22:05:57,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2024-10-10 22:05:57,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 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) [2024-10-10 22:05:57,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-10-10 22:05:57,025 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 55 [2024-10-10 22:05:57,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:57,026 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-10-10 22:05:57,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:05:57,026 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-10-10 22:05:57,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-10 22:05:57,027 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:57,027 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:57,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-10 22:05:57,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-10 22:05:57,228 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:57,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:57,229 INFO L85 PathProgramCache]: Analyzing trace with hash 976023832, now seen corresponding path program 4 times [2024-10-10 22:05:57,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:57,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452901134] [2024-10-10 22:05:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:57,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:57,498 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:05:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:57,504 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-10 22:05:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:57,513 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-10 22:05:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-10-10 22:05:57,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:57,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452901134] [2024-10-10 22:05:57,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452901134] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:57,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652025455] [2024-10-10 22:05:57,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:05:57,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:57,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:57,524 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:05:57,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 22:05:57,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:05:57,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:05:57,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-10 22:05:57,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2024-10-10 22:05:57,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:05:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-10-10 22:05:57,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652025455] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:05:57,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:05:57,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2024-10-10 22:05:57,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396846079] [2024-10-10 22:05:57,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:05:57,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-10 22:05:57,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:57,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-10 22:05:57,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2024-10-10 22:05:57,756 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:05:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:57,854 INFO L93 Difference]: Finished difference Result 112 states and 150 transitions. [2024-10-10 22:05:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-10 22:05:57,855 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 68 [2024-10-10 22:05:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:57,856 INFO L225 Difference]: With dead ends: 112 [2024-10-10 22:05:57,856 INFO L226 Difference]: Without dead ends: 75 [2024-10-10 22:05:57,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2024-10-10 22:05:57,857 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 60 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:57,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 177 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:05:57,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-10 22:05:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-10-10 22:05:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 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) [2024-10-10 22:05:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2024-10-10 22:05:57,874 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 68 [2024-10-10 22:05:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:57,874 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2024-10-10 22:05:57,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:05:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2024-10-10 22:05:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-10-10 22:05:57,876 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:57,876 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 24, 11, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:57,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-10 22:05:58,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:58,081 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:58,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:58,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1259784799, now seen corresponding path program 5 times [2024-10-10 22:05:58,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:58,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714991538] [2024-10-10 22:05:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:58,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:58,337 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-10 22:05:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:58,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-10 22:05:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:58,354 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-10 22:05:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2024-10-10 22:05:58,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:58,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714991538] [2024-10-10 22:05:58,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714991538] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:58,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437970110] [2024-10-10 22:05:58,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:05:58,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:58,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:58,366 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:05:58,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-10 22:05:58,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-10-10 22:05:58,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:05:58,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-10 22:05:58,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2024-10-10 22:05:58,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:05:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-10-10 22:05:59,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437970110] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:05:59,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:05:59,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2024-10-10 22:05:59,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596479098] [2024-10-10 22:05:59,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:05:59,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-10 22:05:59,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:59,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-10 22:05:59,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2024-10-10 22:05:59,136 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:05:59,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:59,240 INFO L93 Difference]: Finished difference Result 188 states and 261 transitions. [2024-10-10 22:05:59,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-10 22:05:59,241 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 114 [2024-10-10 22:05:59,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:59,242 INFO L225 Difference]: With dead ends: 188 [2024-10-10 22:05:59,243 INFO L226 Difference]: Without dead ends: 126 [2024-10-10 22:05:59,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2024-10-10 22:05:59,259 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 176 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:59,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 212 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:05:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-10 22:05:59,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-10-10 22:05:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.322314049586777) internal successors, (160), 121 states have internal predecessors, (160), 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) [2024-10-10 22:05:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2024-10-10 22:05:59,273 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 114 [2024-10-10 22:05:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:59,273 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2024-10-10 22:05:59,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:05:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2024-10-10 22:05:59,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2024-10-10 22:05:59,275 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:59,275 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 54, 12, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:59,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-10 22:05:59,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-10 22:05:59,478 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:59,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:59,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1716270413, now seen corresponding path program 6 times [2024-10-10 22:05:59,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:59,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229689657] [2024-10-10 22:05:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:59,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:59,874 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-10 22:05:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:59,893 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-10 22:05:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:59,906 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2024-10-10 22:05:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2024-10-10 22:05:59,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:59,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229689657] [2024-10-10 22:05:59,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229689657] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:59,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84298444] [2024-10-10 22:05:59,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:05:59,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:59,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:59,924 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:05:59,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-10 22:06:00,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-10 22:06:00,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:06:00,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-10 22:06:00,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 2024 proven. 21 refuted. 0 times theorem prover too weak. 2521 trivial. 0 not checked. [2024-10-10 22:06:00,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4545 trivial. 0 not checked. [2024-10-10 22:06:00,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84298444] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:00,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:00,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2024-10-10 22:06:00,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92903832] [2024-10-10 22:06:00,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:00,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-10 22:06:00,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:00,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-10 22:06:00,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2024-10-10 22:06:00,439 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:06:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:00,479 INFO L93 Difference]: Finished difference Result 247 states and 335 transitions. [2024-10-10 22:06:00,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-10 22:06:00,479 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 205 [2024-10-10 22:06:00,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:00,480 INFO L225 Difference]: With dead ends: 247 [2024-10-10 22:06:00,480 INFO L226 Difference]: Without dead ends: 135 [2024-10-10 22:06:00,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2024-10-10 22:06:00,482 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:00,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:06:00,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-10 22:06:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-10-10 22:06:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.3) internal successors, (169), 130 states have internal predecessors, (169), 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) [2024-10-10 22:06:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 175 transitions. [2024-10-10 22:06:00,488 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 175 transitions. Word has length 205 [2024-10-10 22:06:00,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:00,489 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 175 transitions. [2024-10-10 22:06:00,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:06:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 175 transitions. [2024-10-10 22:06:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2024-10-10 22:06:00,490 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:00,491 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 54, 14, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:00,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-10 22:06:00,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:00,695 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:00,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:00,695 INFO L85 PathProgramCache]: Analyzing trace with hash -502425857, now seen corresponding path program 7 times [2024-10-10 22:06:00,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:00,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442135149] [2024-10-10 22:06:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:00,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:01,045 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-10 22:06:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:01,058 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-10 22:06:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:01,070 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2024-10-10 22:06:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:06:01,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:01,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442135149] [2024-10-10 22:06:01,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442135149] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:01,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864765229] [2024-10-10 22:06:01,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 22:06:01,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:01,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:01,086 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:06:01,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-10 22:06:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:01,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-10 22:06:01,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:06:01,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:06:01,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864765229] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:01,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:01,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2024-10-10 22:06:01,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578571275] [2024-10-10 22:06:01,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:01,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-10 22:06:01,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:01,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-10 22:06:01,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2024-10-10 22:06:01,558 INFO L87 Difference]: Start difference. First operand 135 states and 175 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:06:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:01,594 INFO L93 Difference]: Finished difference Result 270 states and 364 transitions. [2024-10-10 22:06:01,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-10 22:06:01,595 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 214 [2024-10-10 22:06:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:01,596 INFO L225 Difference]: With dead ends: 270 [2024-10-10 22:06:01,596 INFO L226 Difference]: Without dead ends: 150 [2024-10-10 22:06:01,596 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2024-10-10 22:06:01,597 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:01,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:06:01,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-10-10 22:06:01,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-10-10 22:06:01,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.2689655172413794) internal successors, (184), 145 states have internal predecessors, (184), 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) [2024-10-10 22:06:01,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 190 transitions. [2024-10-10 22:06:01,603 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 190 transitions. Word has length 214 [2024-10-10 22:06:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:01,604 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 190 transitions. [2024-10-10 22:06:01,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:06:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 190 transitions. [2024-10-10 22:06:01,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-10-10 22:06:01,605 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:01,606 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 54, 28, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:01,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-10 22:06:01,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-10 22:06:01,810 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:01,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:01,810 INFO L85 PathProgramCache]: Analyzing trace with hash -970550605, now seen corresponding path program 8 times [2024-10-10 22:06:01,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:01,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649928664] [2024-10-10 22:06:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:01,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:02,674 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-10 22:06:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:02,692 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-10-10 22:06:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:02,705 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2024-10-10 22:06:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:06:02,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:02,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649928664] [2024-10-10 22:06:02,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649928664] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:02,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442864922] [2024-10-10 22:06:02,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:06:02,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:02,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:02,722 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:06:02,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-10 22:06:02,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:06:02,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:06:02,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-10 22:06:02,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:06:02,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:06:03,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442864922] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:03,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:03,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 61 [2024-10-10 22:06:03,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262846804] [2024-10-10 22:06:03,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:03,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-10-10 22:06:03,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:03,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-10-10 22:06:03,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2024-10-10 22:06:03,991 INFO L87 Difference]: Start difference. First operand 150 states and 190 transitions. Second operand has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:06:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:04,069 INFO L93 Difference]: Finished difference Result 300 states and 409 transitions. [2024-10-10 22:06:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-10-10 22:06:04,070 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 229 [2024-10-10 22:06:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:04,071 INFO L225 Difference]: With dead ends: 300 [2024-10-10 22:06:04,071 INFO L226 Difference]: Without dead ends: 180 [2024-10-10 22:06:04,072 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2024-10-10 22:06:04,074 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:04,074 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:06:04,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-10-10 22:06:04,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2024-10-10 22:06:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.2228571428571429) internal successors, (214), 175 states have internal predecessors, (214), 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) [2024-10-10 22:06:04,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 220 transitions. [2024-10-10 22:06:04,090 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 220 transitions. Word has length 229 [2024-10-10 22:06:04,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:04,091 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 220 transitions. [2024-10-10 22:06:04,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:06:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 220 transitions. [2024-10-10 22:06:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2024-10-10 22:06:04,093 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:04,093 INFO L215 NwaCegarLoop]: trace histogram [58, 54, 54, 54, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:04,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-10 22:06:04,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-10 22:06:04,294 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:04,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:04,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1749336371, now seen corresponding path program 9 times [2024-10-10 22:06:04,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:04,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238556297] [2024-10-10 22:06:04,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:04,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:06,665 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-10 22:06:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:06,679 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-10-10 22:06:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:06,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2024-10-10 22:06:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:06:06,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:06,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238556297] [2024-10-10 22:06:06,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238556297] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:06,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991224794] [2024-10-10 22:06:06,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:06:06,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:06,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:06,733 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:06:06,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-10 22:06:07,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-10 22:06:07,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:06:07,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-10 22:06:07,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 2024 proven. 105 refuted. 0 times theorem prover too weak. 4154 trivial. 0 not checked. [2024-10-10 22:06:08,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6178 trivial. 0 not checked. [2024-10-10 22:06:08,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991224794] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:08,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:08,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 17, 17] total 91 [2024-10-10 22:06:08,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98796135] [2024-10-10 22:06:08,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:08,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-10-10 22:06:08,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:08,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-10-10 22:06:08,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2024-10-10 22:06:08,851 INFO L87 Difference]: Start difference. First operand 180 states and 220 transitions. Second operand has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:06:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:08,953 INFO L93 Difference]: Finished difference Result 317 states and 413 transitions. [2024-10-10 22:06:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-10-10 22:06:08,953 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 259 [2024-10-10 22:06:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:08,954 INFO L225 Difference]: With dead ends: 317 [2024-10-10 22:06:08,955 INFO L226 Difference]: Without dead ends: 197 [2024-10-10 22:06:08,957 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2024-10-10 22:06:08,957 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:08,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 272 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:06:08,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-10-10 22:06:08,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2024-10-10 22:06:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.203125) internal successors, (231), 192 states have internal predecessors, (231), 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) [2024-10-10 22:06:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 237 transitions. [2024-10-10 22:06:08,973 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 237 transitions. Word has length 259 [2024-10-10 22:06:08,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:08,974 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 237 transitions. [2024-10-10 22:06:08,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:06:08,974 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 237 transitions. [2024-10-10 22:06:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2024-10-10 22:06:08,976 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:08,976 INFO L215 NwaCegarLoop]: trace histogram [59, 54, 54, 54, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:09,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-10 22:06:09,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:09,178 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:09,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:09,178 INFO L85 PathProgramCache]: Analyzing trace with hash 531745919, now seen corresponding path program 10 times [2024-10-10 22:06:09,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:09,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776685368] [2024-10-10 22:06:09,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:09,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:11,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-10 22:06:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:11,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2024-10-10 22:06:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:11,559 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2024-10-10 22:06:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2024-10-10 22:06:11,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:11,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776685368] [2024-10-10 22:06:11,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776685368] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:11,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797777200] [2024-10-10 22:06:11,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:06:11,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:11,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:11,573 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:06:11,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-10 22:06:11,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:06:11,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:06:11,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-10 22:06:11,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2024-10-10 22:06:12,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2024-10-10 22:06:13,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797777200] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:13,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:13,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 21, 21] total 100 [2024-10-10 22:06:13,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489090748] [2024-10-10 22:06:13,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:13,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-10-10 22:06:13,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:13,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-10-10 22:06:13,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2024-10-10 22:06:13,199 INFO L87 Difference]: Start difference. First operand 197 states and 237 transitions. Second operand has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:06:13,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:13,418 INFO L93 Difference]: Finished difference Result 434 states and 577 transitions. [2024-10-10 22:06:13,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-10-10 22:06:13,424 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 276 [2024-10-10 22:06:13,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:13,425 INFO L225 Difference]: With dead ends: 434 [2024-10-10 22:06:13,425 INFO L226 Difference]: Without dead ends: 298 [2024-10-10 22:06:13,427 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2024-10-10 22:06:13,428 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 608 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:13,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 337 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:06:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-10-10 22:06:13,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2024-10-10 22:06:13,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.2696245733788396) internal successors, (372), 293 states have internal predecessors, (372), 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) [2024-10-10 22:06:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 378 transitions. [2024-10-10 22:06:13,436 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 378 transitions. Word has length 276 [2024-10-10 22:06:13,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:13,436 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 378 transitions. [2024-10-10 22:06:13,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:06:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 378 transitions. [2024-10-10 22:06:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2024-10-10 22:06:13,439 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:13,439 INFO L215 NwaCegarLoop]: trace histogram [114, 114, 114, 60, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:13,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-10 22:06:13,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:13,643 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:13,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:13,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1307286285, now seen corresponding path program 11 times [2024-10-10 22:06:13,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:13,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607560587] [2024-10-10 22:06:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:13,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:16,248 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-10 22:06:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:16,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2024-10-10 22:06:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:16,285 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2024-10-10 22:06:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 20142 trivial. 0 not checked. [2024-10-10 22:06:16,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:16,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607560587] [2024-10-10 22:06:16,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607560587] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:16,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214414146] [2024-10-10 22:06:16,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:06:16,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:16,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:16,310 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:06:16,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process