./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-multidimensional/copy-partial-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-23 19:54:39,321 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-23 19:54:39,369 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-23 19:54:39,372 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-23 19:54:39,373 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-23 19:54:39,390 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-23 19:54:39,391 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-23 19:54:39,391 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-23 19:54:39,392 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-23 19:54:39,392 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-23 19:54:39,392 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-23 19:54:39,393 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-23 19:54:39,393 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-23 19:54:39,393 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-23 19:54:39,393 INFO L153 SettingsManager]: * Use SBE=true [2024-10-23 19:54:39,394 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-23 19:54:39,395 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-23 19:54:39,396 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-23 19:54:39,396 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-23 19:54:39,396 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-23 19:54:39,396 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-23 19:54:39,397 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-23 19:54:39,399 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-23 19:54:39,400 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-23 19:54:39,400 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-23 19:54:39,400 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-23 19:54:39,400 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-23 19:54:39,400 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-23 19:54:39,401 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-23 19:54:39,401 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-23 19:54:39,401 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-23 19:54:39,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-23 19:54:39,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:54:39,401 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-23 19:54:39,402 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-23 19:54:39,402 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-23 19:54:39,402 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-23 19:54:39,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-23 19:54:39,402 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-23 19:54:39,402 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-23 19:54:39,402 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-23 19:54:39,403 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-23 19:54:39,403 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee [2024-10-23 19:54:39,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-23 19:54:39,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-23 19:54:39,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-23 19:54:39,615 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-23 19:54:39,615 INFO L274 PluginConnector]: CDTParser initialized [2024-10-23 19:54:39,616 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2024-10-23 19:54:40,802 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-23 19:54:40,942 INFO L384 CDTParser]: Found 1 translation units. [2024-10-23 19:54:40,943 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2024-10-23 19:54:40,950 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aeaf1518/5f69ce8a17e7499095fdad2bef0359c2/FLAG65ec17352 [2024-10-23 19:54:41,362 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aeaf1518/5f69ce8a17e7499095fdad2bef0359c2 [2024-10-23 19:54:41,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-23 19:54:41,366 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-23 19:54:41,368 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-23 19:54:41,368 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-23 19:54:41,372 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-23 19:54:41,372 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:54:41" (1/1) ... [2024-10-23 19:54:41,373 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a983130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41, skipping insertion in model container [2024-10-23 19:54:41,373 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:54:41" (1/1) ... [2024-10-23 19:54:41,388 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-23 19:54:41,510 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-multidimensional/copy-partial-2-n-u.c[416,429] [2024-10-23 19:54:41,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:54:41,529 INFO L200 MainTranslator]: Completed pre-run [2024-10-23 19:54:41,536 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-multidimensional/copy-partial-2-n-u.c[416,429] [2024-10-23 19:54:41,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:54:41,554 INFO L204 MainTranslator]: Completed translation [2024-10-23 19:54:41,555 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41 WrapperNode [2024-10-23 19:54:41,555 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-23 19:54:41,555 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-23 19:54:41,556 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-23 19:54:41,556 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-23 19:54:41,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41" (1/1) ... [2024-10-23 19:54:41,565 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41" (1/1) ... [2024-10-23 19:54:41,578 INFO L138 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2024-10-23 19:54:41,578 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-23 19:54:41,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-23 19:54:41,579 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-23 19:54:41,579 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-23 19:54:41,596 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41" (1/1) ... [2024-10-23 19:54:41,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41" (1/1) ... [2024-10-23 19:54:41,600 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41" (1/1) ... [2024-10-23 19:54:41,608 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 3, 2]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-10-23 19:54:41,609 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41" (1/1) ... [2024-10-23 19:54:41,609 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41" (1/1) ... [2024-10-23 19:54:41,613 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41" (1/1) ... [2024-10-23 19:54:41,615 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41" (1/1) ... [2024-10-23 19:54:41,616 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41" (1/1) ... [2024-10-23 19:54:41,617 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41" (1/1) ... [2024-10-23 19:54:41,618 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-23 19:54:41,619 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-23 19:54:41,619 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-23 19:54:41,619 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-23 19:54:41,627 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41" (1/1) ... [2024-10-23 19:54:41,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:54:41,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:41,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-23 19:54:41,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-23 19:54:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-23 19:54:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-23 19:54:41,688 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-23 19:54:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-23 19:54:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-23 19:54:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-23 19:54:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-23 19:54:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-23 19:54:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-23 19:54:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-23 19:54:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-23 19:54:41,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-23 19:54:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-23 19:54:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-23 19:54:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-23 19:54:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-23 19:54:41,744 INFO L238 CfgBuilder]: Building ICFG [2024-10-23 19:54:41,746 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-23 19:54:41,882 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2024-10-23 19:54:41,882 INFO L287 CfgBuilder]: Performing block encoding [2024-10-23 19:54:41,916 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-23 19:54:41,916 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-23 19:54:41,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:54:41 BoogieIcfgContainer [2024-10-23 19:54:41,917 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-23 19:54:41,918 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-23 19:54:41,918 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-23 19:54:41,921 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-23 19:54:41,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:54:41" (1/3) ... [2024-10-23 19:54:41,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56363303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:54:41, skipping insertion in model container [2024-10-23 19:54:41,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:41" (2/3) ... [2024-10-23 19:54:41,923 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56363303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:54:41, skipping insertion in model container [2024-10-23 19:54:41,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:54:41" (3/3) ... [2024-10-23 19:54:41,924 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2024-10-23 19:54:41,937 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-23 19:54:41,937 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-23 19:54:41,986 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-23 19:54:41,992 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;@2f4acdea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-23 19:54:41,992 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-23 19:54:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:54:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-23 19:54:42,000 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:42,001 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:42,001 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:42,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash -863536884, now seen corresponding path program 1 times [2024-10-23 19:54:42,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:42,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225352823] [2024-10-23 19:54:42,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:42,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,141 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:54:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:54:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-23 19:54:42,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:42,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225352823] [2024-10-23 19:54:42,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225352823] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:54:42,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:54:42,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-23 19:54:42,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258160156] [2024-10-23 19:54:42,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:54:42,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-23 19:54:42,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:42,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-23 19:54:42,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-23 19:54:42,178 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:54:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:42,201 INFO L93 Difference]: Finished difference Result 48 states and 77 transitions. [2024-10-23 19:54:42,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-23 19:54:42,203 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-10-23 19:54:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:42,208 INFO L225 Difference]: With dead ends: 48 [2024-10-23 19:54:42,208 INFO L226 Difference]: Without dead ends: 23 [2024-10-23 19:54:42,209 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-23 19:54:42,212 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:42,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:54:42,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-23 19:54:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-23 19:54:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:54:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2024-10-23 19:54:42,237 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 20 [2024-10-23 19:54:42,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:42,237 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2024-10-23 19:54:42,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:54:42,238 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2024-10-23 19:54:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-23 19:54:42,239 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:42,239 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:42,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-23 19:54:42,239 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:42,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2101247948, now seen corresponding path program 1 times [2024-10-23 19:54:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:42,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880565437] [2024-10-23 19:54:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:54:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,385 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:54:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-23 19:54:42,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:42,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880565437] [2024-10-23 19:54:42,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880565437] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:54:42,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:54:42,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-23 19:54:42,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341428812] [2024-10-23 19:54:42,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:54:42,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 19:54:42,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:42,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 19:54:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:54:42,405 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-23 19:54:42,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:42,459 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2024-10-23 19:54:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 19:54:42,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-10-23 19:54:42,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:42,460 INFO L225 Difference]: With dead ends: 38 [2024-10-23 19:54:42,460 INFO L226 Difference]: Without dead ends: 26 [2024-10-23 19:54:42,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:54:42,462 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:42,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 56 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:54:42,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-23 19:54:42,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-10-23 19:54:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:54:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-10-23 19:54:42,469 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 20 [2024-10-23 19:54:42,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:42,470 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-10-23 19:54:42,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-23 19:54:42,470 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-10-23 19:54:42,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-23 19:54:42,471 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:42,471 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:42,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-23 19:54:42,471 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:42,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1303690610, now seen corresponding path program 1 times [2024-10-23 19:54:42,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:42,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95920532] [2024-10-23 19:54:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:42,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:54:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:54:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-23 19:54:42,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:42,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95920532] [2024-10-23 19:54:42,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95920532] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:54:42,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:54:42,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-23 19:54:42,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609715740] [2024-10-23 19:54:42,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:54:42,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 19:54:42,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:42,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 19:54:42,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:54:42,603 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-23 19:54:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:42,636 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-10-23 19:54:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 19:54:42,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-10-23 19:54:42,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:42,637 INFO L225 Difference]: With dead ends: 46 [2024-10-23 19:54:42,637 INFO L226 Difference]: Without dead ends: 31 [2024-10-23 19:54:42,637 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:54:42,638 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:42,638 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:54:42,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-23 19:54:42,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2024-10-23 19:54:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:54:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-10-23 19:54:42,642 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2024-10-23 19:54:42,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:42,643 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-10-23 19:54:42,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-23 19:54:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-10-23 19:54:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-23 19:54:42,645 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:42,645 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:42,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-23 19:54:42,645 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:42,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:42,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1074082683, now seen corresponding path program 1 times [2024-10-23 19:54:42,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:42,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482848040] [2024-10-23 19:54:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:42,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:54:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,717 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:54:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:54:42,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:42,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482848040] [2024-10-23 19:54:42,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482848040] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:54:42,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:54:42,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-23 19:54:42,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166853818] [2024-10-23 19:54:42,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:54:42,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 19:54:42,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:42,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 19:54:42,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:54:42,724 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-23 19:54:42,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:42,766 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-10-23 19:54:42,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 19:54:42,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-10-23 19:54:42,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:42,767 INFO L225 Difference]: With dead ends: 46 [2024-10-23 19:54:42,769 INFO L226 Difference]: Without dead ends: 38 [2024-10-23 19:54:42,769 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:54:42,771 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:42,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:54:42,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-23 19:54:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2024-10-23 19:54:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:54:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-10-23 19:54:42,778 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 24 [2024-10-23 19:54:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:42,778 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-10-23 19:54:42,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-23 19:54:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-10-23 19:54:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-23 19:54:42,779 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:42,779 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:42,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-23 19:54:42,781 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:42,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1191025207, now seen corresponding path program 1 times [2024-10-23 19:54:42,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:42,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382002190] [2024-10-23 19:54:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:42,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:54:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,831 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:54:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:54:42,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:42,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382002190] [2024-10-23 19:54:42,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382002190] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:54:42,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:54:42,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-23 19:54:42,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25129196] [2024-10-23 19:54:42,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:54:42,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 19:54:42,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:42,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 19:54:42,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:54:42,842 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-23 19:54:42,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:42,874 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2024-10-23 19:54:42,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 19:54:42,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2024-10-23 19:54:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:42,876 INFO L225 Difference]: With dead ends: 43 [2024-10-23 19:54:42,876 INFO L226 Difference]: Without dead ends: 32 [2024-10-23 19:54:42,876 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:54:42,877 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:42,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 38 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:54:42,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-23 19:54:42,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2024-10-23 19:54:42,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:54:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-10-23 19:54:42,886 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 27 [2024-10-23 19:54:42,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:42,886 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-10-23 19:54:42,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-23 19:54:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-10-23 19:54:42,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-23 19:54:42,888 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:42,888 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:42,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-23 19:54:42,889 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:42,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:42,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1250290794, now seen corresponding path program 1 times [2024-10-23 19:54:42,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:42,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308152217] [2024-10-23 19:54:42,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:42,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,966 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:54:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:54:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:54:42,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:42,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308152217] [2024-10-23 19:54:42,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308152217] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:42,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727472150] [2024-10-23 19:54:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:42,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:42,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:42,980 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:42,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-23 19:54:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:43,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 19:54:43,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:54:43,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:54:43,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727472150] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:43,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:43,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-10-23 19:54:43,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649393253] [2024-10-23 19:54:43,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:43,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-23 19:54:43,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:43,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-23 19:54:43,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-10-23 19:54:43,153 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:54:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:43,228 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2024-10-23 19:54:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-23 19:54:43,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-10-23 19:54:43,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:43,229 INFO L225 Difference]: With dead ends: 72 [2024-10-23 19:54:43,229 INFO L226 Difference]: Without dead ends: 53 [2024-10-23 19:54:43,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2024-10-23 19:54:43,230 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 132 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:43,230 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 67 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:54:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-23 19:54:43,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2024-10-23 19:54:43,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:54:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-10-23 19:54:43,240 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 28 [2024-10-23 19:54:43,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:43,240 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-10-23 19:54:43,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:54:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-10-23 19:54:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-23 19:54:43,242 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:43,242 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:43,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-23 19:54:43,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-23 19:54:43,443 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:43,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:43,443 INFO L85 PathProgramCache]: Analyzing trace with hash -328450783, now seen corresponding path program 2 times [2024-10-23 19:54:43,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:43,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301024840] [2024-10-23 19:54:43,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:43,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:43,535 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:54:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:43,538 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:54:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:54:43,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:43,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301024840] [2024-10-23 19:54:43,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301024840] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:43,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374758098] [2024-10-23 19:54:43,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:54:43,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:43,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:43,545 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:43,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-23 19:54:43,603 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:54:43,603 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:43,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-23 19:54:43,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:54:43,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:54:43,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374758098] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:43,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:43,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-10-23 19:54:43,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31868612] [2024-10-23 19:54:43,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:43,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-23 19:54:43,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:43,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-23 19:54:43,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2024-10-23 19:54:43,744 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:54:43,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:43,908 INFO L93 Difference]: Finished difference Result 117 states and 152 transitions. [2024-10-23 19:54:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-23 19:54:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2024-10-23 19:54:43,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:43,911 INFO L225 Difference]: With dead ends: 117 [2024-10-23 19:54:43,911 INFO L226 Difference]: Without dead ends: 95 [2024-10-23 19:54:43,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2024-10-23 19:54:43,912 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 183 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:43,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 132 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:54:43,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-23 19:54:43,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 37. [2024-10-23 19:54:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:54:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-10-23 19:54:43,920 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 31 [2024-10-23 19:54:43,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:43,921 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-10-23 19:54:43,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:54:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-10-23 19:54:43,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-23 19:54:43,922 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:43,922 INFO L215 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:43,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-23 19:54:44,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-23 19:54:44,123 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:44,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1039517825, now seen corresponding path program 3 times [2024-10-23 19:54:44,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:44,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995900902] [2024-10-23 19:54:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:44,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:44,333 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:54:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:44,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:54:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:54:44,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:44,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995900902] [2024-10-23 19:54:44,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995900902] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:44,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493536894] [2024-10-23 19:54:44,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:54:44,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:44,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:44,352 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:44,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-23 19:54:44,412 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-23 19:54:44,412 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:44,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 19:54:44,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-23 19:54:44,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-23 19:54:44,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493536894] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:44,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:44,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2024-10-23 19:54:44,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731816869] [2024-10-23 19:54:44,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:44,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-23 19:54:44,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:44,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-23 19:54:44,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2024-10-23 19:54:44,543 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-23 19:54:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:45,702 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2024-10-23 19:54:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-10-23 19:54:45,703 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2024-10-23 19:54:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:45,704 INFO L225 Difference]: With dead ends: 172 [2024-10-23 19:54:45,704 INFO L226 Difference]: Without dead ends: 144 [2024-10-23 19:54:45,706 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1913, Invalid=4249, Unknown=0, NotChecked=0, Total=6162 [2024-10-23 19:54:45,707 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 292 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:45,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 138 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:54:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-10-23 19:54:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 80. [2024-10-23 19:54:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:54:45,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2024-10-23 19:54:45,722 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 37 [2024-10-23 19:54:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:45,722 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2024-10-23 19:54:45,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-23 19:54:45,722 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2024-10-23 19:54:45,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-10-23 19:54:45,723 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:45,724 INFO L215 NwaCegarLoop]: trace histogram [44, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:45,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-23 19:54:45,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:45,925 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:45,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:45,925 INFO L85 PathProgramCache]: Analyzing trace with hash -226571017, now seen corresponding path program 4 times [2024-10-23 19:54:45,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:45,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441133778] [2024-10-23 19:54:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:45,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:46,285 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:54:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:46,288 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:54:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 436 proven. 66 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2024-10-23 19:54:46,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:46,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441133778] [2024-10-23 19:54:46,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441133778] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:46,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614792231] [2024-10-23 19:54:46,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 19:54:46,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:46,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:46,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:46,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-23 19:54:46,367 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 19:54:46,367 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:46,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-23 19:54:46,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:46,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-23 19:54:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1148 trivial. 0 not checked. [2024-10-23 19:54:46,511 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:46,589 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2024-10-23 19:54:46,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2024-10-23 19:54:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1148 trivial. 0 not checked. [2024-10-23 19:54:46,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614792231] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:46,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:46,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 23 [2024-10-23 19:54:46,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370874559] [2024-10-23 19:54:46,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:46,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-23 19:54:46,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:46,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-23 19:54:46,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2024-10-23 19:54:46,623 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:54:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:47,970 INFO L93 Difference]: Finished difference Result 292 states and 359 transitions. [2024-10-23 19:54:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-10-23 19:54:47,970 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 80 [2024-10-23 19:54:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:47,971 INFO L225 Difference]: With dead ends: 292 [2024-10-23 19:54:47,971 INFO L226 Difference]: Without dead ends: 233 [2024-10-23 19:54:47,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2168 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1876, Invalid=5434, Unknown=0, NotChecked=0, Total=7310 [2024-10-23 19:54:47,974 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 630 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:47,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 175 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 19:54:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-10-23 19:54:47,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 87. [2024-10-23 19:54:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.108433734939759) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:54:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2024-10-23 19:54:47,993 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 80 [2024-10-23 19:54:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:47,993 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2024-10-23 19:54:47,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:54:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2024-10-23 19:54:47,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-10-23 19:54:47,995 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:47,995 INFO L215 NwaCegarLoop]: trace histogram [48, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:48,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-23 19:54:48,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:48,196 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:48,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:48,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1852789383, now seen corresponding path program 1 times [2024-10-23 19:54:48,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:48,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714017050] [2024-10-23 19:54:48,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:48,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:48,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:54:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:48,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:54:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 511 proven. 78 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2024-10-23 19:54:48,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:48,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714017050] [2024-10-23 19:54:48,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714017050] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:48,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123477676] [2024-10-23 19:54:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:48,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:48,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:48,571 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:48,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-23 19:54:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:48,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-23 19:54:48,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 511 proven. 78 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2024-10-23 19:54:48,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 511 proven. 78 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2024-10-23 19:54:49,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123477676] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:49,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:49,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2024-10-23 19:54:49,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505106218] [2024-10-23 19:54:49,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:49,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-23 19:54:49,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:49,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-23 19:54:49,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=1019, Unknown=0, NotChecked=0, Total=1806 [2024-10-23 19:54:49,126 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 43 states have internal predecessors, (67), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:54:49,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:49,562 INFO L93 Difference]: Finished difference Result 362 states and 484 transitions. [2024-10-23 19:54:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-23 19:54:49,562 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 43 states have internal predecessors, (67), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 87 [2024-10-23 19:54:49,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:49,563 INFO L225 Difference]: With dead ends: 362 [2024-10-23 19:54:49,564 INFO L226 Difference]: Without dead ends: 297 [2024-10-23 19:54:49,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1190, Invalid=1890, Unknown=0, NotChecked=0, Total=3080 [2024-10-23 19:54:49,565 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 533 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:49,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 199 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 19:54:49,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-10-23 19:54:49,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 143. [2024-10-23 19:54:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 139 states have (on average 1.064748201438849) internal successors, (148), 139 states have internal predecessors, (148), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:54:49,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2024-10-23 19:54:49,587 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 87 [2024-10-23 19:54:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:49,587 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2024-10-23 19:54:49,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 43 states have internal predecessors, (67), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:54:49,588 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2024-10-23 19:54:49,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-10-23 19:54:49,589 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:49,589 INFO L215 NwaCegarLoop]: trace histogram [104, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:49,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-23 19:54:49,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-23 19:54:49,794 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:49,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:49,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1966440569, now seen corresponding path program 2 times [2024-10-23 19:54:49,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:49,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887496034] [2024-10-23 19:54:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:49,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:50,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:54:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:50,833 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:54:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5802 backedges. 2191 proven. 351 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2024-10-23 19:54:50,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:50,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887496034] [2024-10-23 19:54:50,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887496034] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:50,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200654466] [2024-10-23 19:54:50,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:54:50,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:50,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:50,838 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:50,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-23 19:54:51,066 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:54:51,066 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:51,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-23 19:54:51,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5802 backedges. 2191 proven. 351 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2024-10-23 19:54:51,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5802 backedges. 2191 proven. 351 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2024-10-23 19:54:52,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200654466] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:52,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:52,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 85 [2024-10-23 19:54:52,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94137374] [2024-10-23 19:54:52,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:52,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-10-23 19:54:52,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:52,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-10-23 19:54:52,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3139, Invalid=4001, Unknown=0, NotChecked=0, Total=7140 [2024-10-23 19:54:52,267 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 85 states, 85 states have (on average 1.2823529411764707) internal successors, (109), 85 states have internal predecessors, (109), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:54:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:53,676 INFO L93 Difference]: Finished difference Result 684 states and 918 transitions. [2024-10-23 19:54:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-10-23 19:54:53,677 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.2823529411764707) internal successors, (109), 85 states have internal predecessors, (109), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 143 [2024-10-23 19:54:53,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:53,679 INFO L225 Difference]: With dead ends: 684 [2024-10-23 19:54:53,679 INFO L226 Difference]: Without dead ends: 577 [2024-10-23 19:54:53,681 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4425 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4732, Invalid=7700, Unknown=0, NotChecked=0, Total=12432 [2024-10-23 19:54:53,682 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1538 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1538 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:53,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1538 Valid, 319 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-23 19:54:53,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2024-10-23 19:54:53,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 255. [2024-10-23 19:54:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 251 states have (on average 1.0358565737051793) internal successors, (260), 251 states have internal predecessors, (260), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:54:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 264 transitions. [2024-10-23 19:54:53,714 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 264 transitions. Word has length 143 [2024-10-23 19:54:53,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:53,714 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 264 transitions. [2024-10-23 19:54:53,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.2823529411764707) internal successors, (109), 85 states have internal predecessors, (109), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:54:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 264 transitions. [2024-10-23 19:54:53,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2024-10-23 19:54:53,716 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:53,716 INFO L215 NwaCegarLoop]: trace histogram [216, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:53,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-23 19:54:53,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:53,917 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:53,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:53,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2135390599, now seen corresponding path program 3 times [2024-10-23 19:54:53,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:53,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531958545] [2024-10-23 19:54:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:53,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:57,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:54:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:57,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:54:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 24114 backedges. 9079 proven. 1485 refuted. 0 times theorem prover too weak. 13550 trivial. 0 not checked. [2024-10-23 19:54:57,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531958545] [2024-10-23 19:54:57,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531958545] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020811004] [2024-10-23 19:54:57,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:54:57,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:57,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:57,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:57,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-23 19:54:57,366 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-23 19:54:57,366 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:57,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 19:54:57,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 24114 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24113 trivial. 0 not checked. [2024-10-23 19:54:57,601 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24114 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24113 trivial. 0 not checked. [2024-10-23 19:54:57,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020811004] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:57,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:57,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 5, 5] total 64 [2024-10-23 19:54:57,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238402266] [2024-10-23 19:54:57,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:57,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-10-23 19:54:57,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:57,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-10-23 19:54:57,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1622, Invalid=2410, Unknown=0, NotChecked=0, Total=4032 [2024-10-23 19:54:57,833 INFO L87 Difference]: Start difference. First operand 255 states and 264 transitions. Second operand has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-23 19:55:13,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:55:13,193 INFO L93 Difference]: Finished difference Result 1851 states and 2314 transitions. [2024-10-23 19:55:13,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 282 states. [2024-10-23 19:55:13,194 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 255 [2024-10-23 19:55:13,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:55:13,198 INFO L225 Difference]: With dead ends: 1851 [2024-10-23 19:55:13,198 INFO L226 Difference]: Without dead ends: 1660 [2024-10-23 19:55:13,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39340 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=34942, Invalid=83050, Unknown=0, NotChecked=0, Total=117992 [2024-10-23 19:55:13,206 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 10598 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 1705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10598 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1705 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-23 19:55:13,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10598 Valid, 232 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1705 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-23 19:55:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2024-10-23 19:55:13,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 271. [2024-10-23 19:55:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 267 states have (on average 1.0449438202247192) internal successors, (279), 267 states have internal predecessors, (279), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:55:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 283 transitions. [2024-10-23 19:55:13,252 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 283 transitions. Word has length 255 [2024-10-23 19:55:13,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:55:13,252 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 283 transitions. [2024-10-23 19:55:13,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-23 19:55:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 283 transitions. [2024-10-23 19:55:13,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2024-10-23 19:55:13,254 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:55:13,254 INFO L215 NwaCegarLoop]: trace histogram [220, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:55:13,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-23 19:55:13,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:55:13,455 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:55:13,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:55:13,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1769418320, now seen corresponding path program 4 times [2024-10-23 19:55:13,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:55:13,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799974214] [2024-10-23 19:55:13,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:55:13,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:55:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:55:16,426 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:55:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:55:16,428 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:55:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:55:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 25042 backedges. 9412 proven. 1540 refuted. 0 times theorem prover too weak. 14090 trivial. 0 not checked. [2024-10-23 19:55:16,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:55:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799974214] [2024-10-23 19:55:16,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799974214] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:55:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505730287] [2024-10-23 19:55:16,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 19:55:16,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:55:16,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:55:16,437 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:55:16,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-23 19:55:16,732 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 19:55:16,732 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:55:16,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-23 19:55:16,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:55:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 25042 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 25020 trivial. 0 not checked. [2024-10-23 19:55:16,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:55:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 25042 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 25020 trivial. 0 not checked. [2024-10-23 19:55:17,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505730287] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:55:17,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:55:17,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 7, 7] total 66 [2024-10-23 19:55:17,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058823120] [2024-10-23 19:55:17,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:55:17,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-23 19:55:17,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:55:17,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-23 19:55:17,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1680, Invalid=2610, Unknown=0, NotChecked=0, Total=4290 [2024-10-23 19:55:17,003 INFO L87 Difference]: Start difference. First operand 271 states and 283 transitions. Second operand has 66 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 66 states have internal predecessors, (108), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:55:19,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:55:19,749 INFO L93 Difference]: Finished difference Result 1006 states and 1312 transitions. [2024-10-23 19:55:19,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-10-23 19:55:19,749 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 66 states have internal predecessors, (108), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 271 [2024-10-23 19:55:19,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:55:19,752 INFO L225 Difference]: With dead ends: 1006 [2024-10-23 19:55:19,752 INFO L226 Difference]: Without dead ends: 800 [2024-10-23 19:55:19,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 593 SyntacticMatches, 3 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5170, Invalid=10082, Unknown=0, NotChecked=0, Total=15252 [2024-10-23 19:55:19,753 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1329 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-23 19:55:19,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1329 Valid, 356 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-23 19:55:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2024-10-23 19:55:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 306. [2024-10-23 19:55:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 302 states have (on average 1.0662251655629138) internal successors, (322), 302 states have internal predecessors, (322), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:55:19,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 326 transitions. [2024-10-23 19:55:19,821 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 326 transitions. Word has length 271 [2024-10-23 19:55:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:55:19,821 INFO L471 AbstractCegarLoop]: Abstraction has 306 states and 326 transitions. [2024-10-23 19:55:19,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 66 states have internal predecessors, (108), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:55:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 326 transitions. [2024-10-23 19:55:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2024-10-23 19:55:19,822 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:55:19,823 INFO L215 NwaCegarLoop]: trace histogram [224, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:55:19,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-23 19:55:20,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-23 19:55:20,024 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:55:20,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:55:20,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2044755355, now seen corresponding path program 1 times [2024-10-23 19:55:20,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:55:20,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420457551] [2024-10-23 19:55:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:55:20,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:55:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:55:23,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:55:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:55:23,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:55:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:55:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25947 backedges. 9751 proven. 1596 refuted. 0 times theorem prover too weak. 14600 trivial. 0 not checked. [2024-10-23 19:55:23,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:55:23,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420457551] [2024-10-23 19:55:23,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420457551] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:55:23,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131884232] [2024-10-23 19:55:23,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:55:23,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:55:23,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:55:23,158 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:55:23,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-23 19:55:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:55:23,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-23 19:55:23,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:55:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25947 backedges. 9751 proven. 1596 refuted. 0 times theorem prover too weak. 14600 trivial. 0 not checked. [2024-10-23 19:55:24,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:55:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25947 backedges. 9751 proven. 1596 refuted. 0 times theorem prover too weak. 14600 trivial. 0 not checked. [2024-10-23 19:55:27,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131884232] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:55:27,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:55:27,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 175 [2024-10-23 19:55:27,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815685058] [2024-10-23 19:55:27,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:55:27,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2024-10-23 19:55:27,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:55:27,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2024-10-23 19:55:27,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13459, Invalid=16991, Unknown=0, NotChecked=0, Total=30450 [2024-10-23 19:55:27,954 INFO L87 Difference]: Start difference. First operand 306 states and 326 transitions. Second operand has 175 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 175 states have internal predecessors, (201), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:55:36,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:55:36,927 INFO L93 Difference]: Finished difference Result 1792 states and 2621 transitions. [2024-10-23 19:55:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2024-10-23 19:55:36,927 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 175 states have internal predecessors, (201), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 278 [2024-10-23 19:55:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:55:36,932 INFO L225 Difference]: With dead ends: 1792 [2024-10-23 19:55:36,932 INFO L226 Difference]: Without dead ends: 1552 [2024-10-23 19:55:36,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19605 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=20242, Invalid=33350, Unknown=0, NotChecked=0, Total=53592 [2024-10-23 19:55:36,935 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2801 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2801 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-23 19:55:36,935 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2801 Valid, 532 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1043 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-23 19:55:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2024-10-23 19:55:37,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 538. [2024-10-23 19:55:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 534 states have (on average 1.0374531835205993) internal successors, (554), 534 states have internal predecessors, (554), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:55:37,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 558 transitions. [2024-10-23 19:55:37,028 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 558 transitions. Word has length 278 [2024-10-23 19:55:37,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:55:37,029 INFO L471 AbstractCegarLoop]: Abstraction has 538 states and 558 transitions. [2024-10-23 19:55:37,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 175 states have internal predecessors, (201), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:55:37,029 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 558 transitions. [2024-10-23 19:55:37,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2024-10-23 19:55:37,031 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:55:37,031 INFO L215 NwaCegarLoop]: trace histogram [456, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:55:37,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-23 19:55:37,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-23 19:55:37,232 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:55:37,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:55:37,232 INFO L85 PathProgramCache]: Analyzing trace with hash 362258789, now seen corresponding path program 2 times [2024-10-23 19:55:37,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:55:37,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421085904] [2024-10-23 19:55:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:55:37,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:55:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:55:48,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 19:55:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:55:48,608 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-23 19:55:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:55:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 105639 backedges. 39679 proven. 6555 refuted. 0 times theorem prover too weak. 59405 trivial. 0 not checked. [2024-10-23 19:55:48,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:55:48,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421085904] [2024-10-23 19:55:48,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421085904] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:55:48,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897704607] [2024-10-23 19:55:48,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:55:48,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:55:48,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:55:48,617 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:55:48,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-23 19:55:49,409 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:55:49,409 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:55:49,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 4296 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-10-23 19:55:49,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:55:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 105639 backedges. 39679 proven. 6555 refuted. 0 times theorem prover too weak. 59405 trivial. 0 not checked. [2024-10-23 19:55:53,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:56:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 105639 backedges. 39679 proven. 6555 refuted. 0 times theorem prover too weak. 59405 trivial. 0 not checked. [2024-10-23 19:56:05,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897704607] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:56:05,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:56:05,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118, 118] total 349 [2024-10-23 19:56:05,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689418489] [2024-10-23 19:56:05,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:56:05,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 349 states [2024-10-23 19:56:05,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:56:05,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 349 interpolants. [2024-10-23 19:56:05,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53827, Invalid=67625, Unknown=0, NotChecked=0, Total=121452 [2024-10-23 19:56:05,634 INFO L87 Difference]: Start difference. First operand 538 states and 558 transitions. Second operand has 349 states, 349 states have (on average 1.0744985673352436) internal successors, (375), 349 states have internal predecessors, (375), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)