./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina4.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 933eff495d93b07d12af9180ab5b75cc35fb173187f8af9883307194e1e7fea3 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 22:26:44,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 22:26:44,655 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 22:26:44,661 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 22:26:44,663 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 22:26:44,700 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 22:26:44,700 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 22:26:44,701 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 22:26:44,702 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 22:26:44,703 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 22:26:44,703 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 22:26:44,704 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 22:26:44,704 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 22:26:44,705 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 22:26:44,706 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 22:26:44,707 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 22:26:44,708 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 22:26:44,708 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 22:26:44,708 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 22:26:44,708 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 22:26:44,709 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 22:26:44,710 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 22:26:44,710 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 22:26:44,711 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 22:26:44,711 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 22:26:44,711 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 22:26:44,712 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 22:26:44,712 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 22:26:44,713 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 22:26:44,713 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 22:26:44,713 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 22:26:44,716 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 22:26:44,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:26:44,722 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 22:26:44,722 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 22:26:44,723 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 22:26:44,723 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 22:26:44,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 22:26:44,723 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 22:26:44,723 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 22:26:44,724 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 22:26:44,724 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 22:26:44,724 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 933eff495d93b07d12af9180ab5b75cc35fb173187f8af9883307194e1e7fea3 [2024-10-10 22:26:44,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 22:26:44,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 22:26:45,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 22:26:45,004 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 22:26:45,005 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 22:26:45,006 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina4.c [2024-10-10 22:26:46,430 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 22:26:46,628 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 22:26:46,629 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina4.c [2024-10-10 22:26:46,635 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/7b825403e/eb8d04543a3e40e8800609e33650ad93/FLAG8cc2be8ae [2024-10-10 22:26:46,651 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/7b825403e/eb8d04543a3e40e8800609e33650ad93 [2024-10-10 22:26:46,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 22:26:46,656 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 22:26:46,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 22:26:46,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 22:26:46,665 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 22:26:46,665 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:26:46" (1/1) ... [2024-10-10 22:26:46,666 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b9a22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46, skipping insertion in model container [2024-10-10 22:26:46,666 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:26:46" (1/1) ... [2024-10-10 22:26:46,686 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 22:26:46,835 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina4.c[588,601] [2024-10-10 22:26:46,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:26:46,871 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 22:26:46,882 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina4.c[588,601] [2024-10-10 22:26:46,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:26:46,908 INFO L204 MainTranslator]: Completed translation [2024-10-10 22:26:46,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46 WrapperNode [2024-10-10 22:26:46,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 22:26:46,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 22:26:46,910 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 22:26:46,910 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 22:26:46,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46" (1/1) ... [2024-10-10 22:26:46,922 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46" (1/1) ... [2024-10-10 22:26:46,939 INFO L138 Inliner]: procedures = 17, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 106 [2024-10-10 22:26:46,939 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 22:26:46,940 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 22:26:46,940 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 22:26:46,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 22:26:46,950 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46" (1/1) ... [2024-10-10 22:26:46,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46" (1/1) ... [2024-10-10 22:26:46,953 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46" (1/1) ... [2024-10-10 22:26:46,974 INFO L175 MemorySlicer]: Split 21 memory accesses to 5 slices as follows [2, 8, 4, 5, 2]. 38 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0]. The 5 writes are split as follows [0, 0, 2, 2, 1]. [2024-10-10 22:26:46,975 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46" (1/1) ... [2024-10-10 22:26:46,975 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46" (1/1) ... [2024-10-10 22:26:46,981 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46" (1/1) ... [2024-10-10 22:26:46,987 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46" (1/1) ... [2024-10-10 22:26:46,988 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46" (1/1) ... [2024-10-10 22:26:46,989 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46" (1/1) ... [2024-10-10 22:26:46,992 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 22:26:46,993 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 22:26:46,993 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 22:26:46,993 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 22:26:46,994 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46" (1/1) ... [2024-10-10 22:26:46,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:26:47,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:26:47,033 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 22:26:47,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 22:26:47,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 22:26:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 22:26:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 22:26:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-10 22:26:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-10 22:26:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-10 22:26:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 22:26:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 22:26:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 22:26:47,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-10 22:26:47,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-10 22:26:47,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-10 22:26:47,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-10 22:26:47,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 22:26:47,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 22:26:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 22:26:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 22:26:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-10 22:26:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-10 22:26:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-10 22:26:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 22:26:47,196 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 22:26:47,201 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 22:26:47,395 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-10-10 22:26:47,395 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 22:26:47,426 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 22:26:47,426 INFO L314 CfgBuilder]: Removed 5 assume(true) statements. [2024-10-10 22:26:47,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:26:47 BoogieIcfgContainer [2024-10-10 22:26:47,427 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 22:26:47,432 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 22:26:47,433 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 22:26:47,436 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 22:26:47,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 10:26:46" (1/3) ... [2024-10-10 22:26:47,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4735a94d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:26:47, skipping insertion in model container [2024-10-10 22:26:47,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:26:46" (2/3) ... [2024-10-10 22:26:47,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4735a94d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:26:47, skipping insertion in model container [2024-10-10 22:26:47,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:26:47" (3/3) ... [2024-10-10 22:26:47,439 INFO L112 eAbstractionObserver]: Analyzing ICFG sina4.c [2024-10-10 22:26:47,456 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 22:26:47,457 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 22:26:47,525 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 22:26:47,532 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;@a04aef3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 22:26:47,533 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 22:26:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:47,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-10 22:26:47,545 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:26:47,546 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:26:47,546 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:26:47,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:26:47,552 INFO L85 PathProgramCache]: Analyzing trace with hash -270928915, now seen corresponding path program 1 times [2024-10-10 22:26:47,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:26:47,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430463596] [2024-10-10 22:26:47,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:26:47,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:26:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:26:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:26:47,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:26:47,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430463596] [2024-10-10 22:26:47,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430463596] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:26:47,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:26:47,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-10 22:26:47,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860824801] [2024-10-10 22:26:47,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:26:47,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-10 22:26:47,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:26:47,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-10 22:26:47,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 22:26:47,777 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:47,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:26:47,820 INFO L93 Difference]: Finished difference Result 37 states and 59 transitions. [2024-10-10 22:26:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-10 22:26:47,824 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-10 22:26:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:26:47,832 INFO L225 Difference]: With dead ends: 37 [2024-10-10 22:26:47,832 INFO L226 Difference]: Without dead ends: 17 [2024-10-10 22:26:47,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 22:26:47,843 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:26:47,845 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:26:47,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-10 22:26:47,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-10-10 22:26:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:47,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2024-10-10 22:26:47,876 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 15 [2024-10-10 22:26:47,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:26:47,877 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2024-10-10 22:26:47,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:47,877 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2024-10-10 22:26:47,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-10 22:26:47,878 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:26:47,878 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:26:47,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 22:26:47,879 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:26:47,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:26:47,880 INFO L85 PathProgramCache]: Analyzing trace with hash -863276055, now seen corresponding path program 1 times [2024-10-10 22:26:47,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:26:47,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080792757] [2024-10-10 22:26:47,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:26:47,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:26:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:26:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:26:48,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:26:48,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080792757] [2024-10-10 22:26:48,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080792757] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:26:48,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:26:48,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:26:48,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49833036] [2024-10-10 22:26:48,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:26:48,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:26:48,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:26:48,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:26:48,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:26:48,153 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:48,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:26:48,219 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2024-10-10 22:26:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:26:48,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-10 22:26:48,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:26:48,221 INFO L225 Difference]: With dead ends: 38 [2024-10-10 22:26:48,221 INFO L226 Difference]: Without dead ends: 26 [2024-10-10 22:26:48,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:26:48,223 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:26:48,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 13 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:26:48,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-10 22:26:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2024-10-10 22:26:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-10-10 22:26:48,236 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2024-10-10 22:26:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:26:48,236 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-10-10 22:26:48,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-10-10 22:26:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-10 22:26:48,237 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:26:48,238 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:26:48,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-10 22:26:48,238 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:26:48,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:26:48,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1570117358, now seen corresponding path program 1 times [2024-10-10 22:26:48,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:26:48,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396038254] [2024-10-10 22:26:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:26:48,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:26:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:26:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:26:49,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:26:49,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396038254] [2024-10-10 22:26:49,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396038254] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:26:49,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400430557] [2024-10-10 22:26:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:26:49,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:26:49,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:26:49,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:26:49,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 22:26:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:26:49,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-10 22:26:49,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:26:49,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:26:49,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:26:49,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:26:50,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:26:50,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:26:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:26:50,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:26:50,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2024-10-10 22:26:50,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2024-10-10 22:26:50,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2024-10-10 22:26:50,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2024-10-10 22:26:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:26:50,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400430557] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:26:50,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:26:50,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2024-10-10 22:26:50,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686946046] [2024-10-10 22:26:50,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:26:50,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-10 22:26:50,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:26:50,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-10 22:26:50,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2024-10-10 22:26:50,389 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:26:50,921 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2024-10-10 22:26:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-10 22:26:50,921 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-10 22:26:50,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:26:50,922 INFO L225 Difference]: With dead ends: 50 [2024-10-10 22:26:50,922 INFO L226 Difference]: Without dead ends: 48 [2024-10-10 22:26:50,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2024-10-10 22:26:50,924 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 86 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:26:50,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 125 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-10 22:26:50,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-10 22:26:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2024-10-10 22:26:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2024-10-10 22:26:50,933 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 19 [2024-10-10 22:26:50,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:26:50,934 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2024-10-10 22:26:50,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2024-10-10 22:26:50,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-10 22:26:50,935 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:26:50,935 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:26:50,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-10 22:26:51,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:26:51,140 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:26:51,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:26:51,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1447203495, now seen corresponding path program 2 times [2024-10-10 22:26:51,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:26:51,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303556407] [2024-10-10 22:26:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:26:51,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:26:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:26:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:26:51,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:26:51,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303556407] [2024-10-10 22:26:51,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303556407] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:26:51,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761240822] [2024-10-10 22:26:51,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:26:51,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:26:51,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:26:51,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:26:51,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 22:26:51,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:26:51,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:26:51,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 22:26:51,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:26:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:26:51,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:26:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:26:51,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761240822] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:26:51,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:26:51,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-10 22:26:51,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465925840] [2024-10-10 22:26:51,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:26:51,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-10 22:26:51,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:26:51,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-10 22:26:51,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-10 22:26:51,385 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:51,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:26:51,498 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2024-10-10 22:26:51,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-10 22:26:51,498 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-10 22:26:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:26:51,499 INFO L225 Difference]: With dead ends: 80 [2024-10-10 22:26:51,499 INFO L226 Difference]: Without dead ends: 46 [2024-10-10 22:26:51,500 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-10-10 22:26:51,500 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:26:51,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 37 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:26:51,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-10 22:26:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2024-10-10 22:26:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-10-10 22:26:51,513 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2024-10-10 22:26:51,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:26:51,514 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-10-10 22:26:51,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-10-10 22:26:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-10 22:26:51,515 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:26:51,515 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:26:51,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-10 22:26:51,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:26:51,716 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:26:51,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:26:51,717 INFO L85 PathProgramCache]: Analyzing trace with hash 792290998, now seen corresponding path program 3 times [2024-10-10 22:26:51,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:26:51,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554825743] [2024-10-10 22:26:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:26:51,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:26:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:26:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:26:51,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:26:51,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554825743] [2024-10-10 22:26:51,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554825743] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:26:51,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001823537] [2024-10-10 22:26:51,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:26:51,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:26:51,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:26:51,809 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:26:51,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 22:26:51,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-10 22:26:51,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:26:51,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 22:26:51,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:26:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:26:51,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:26:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:26:51,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001823537] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:26:51,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:26:51,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-10 22:26:51,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488390796] [2024-10-10 22:26:51,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:26:51,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-10 22:26:51,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:26:51,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-10 22:26:51,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-10 22:26:51,974 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:52,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:26:52,092 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2024-10-10 22:26:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-10 22:26:52,093 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-10 22:26:52,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:26:52,093 INFO L225 Difference]: With dead ends: 46 [2024-10-10 22:26:52,093 INFO L226 Difference]: Without dead ends: 35 [2024-10-10 22:26:52,094 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:26:52,095 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:26:52,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 37 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:26:52,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-10 22:26:52,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2024-10-10 22:26:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:52,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-10 22:26:52,101 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2024-10-10 22:26:52,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:26:52,102 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-10 22:26:52,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-10 22:26:52,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-10 22:26:52,103 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:26:52,103 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:26:52,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-10 22:26:52,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:26:52,307 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:26:52,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:26:52,307 INFO L85 PathProgramCache]: Analyzing trace with hash -35180535, now seen corresponding path program 4 times [2024-10-10 22:26:52,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:26:52,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897180890] [2024-10-10 22:26:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:26:52,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:26:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:26:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:26:53,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:26:53,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897180890] [2024-10-10 22:26:53,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897180890] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:26:53,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448530010] [2024-10-10 22:26:53,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:26:53,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:26:53,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:26:53,699 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:26:53,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 22:26:53,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:26:53,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:26:53,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-10-10 22:26:53,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:26:53,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:26:53,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:26:53,869 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-10 22:26:53,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2024-10-10 22:26:54,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:26:54,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-10-10 22:26:54,384 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:26:54,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-10-10 22:26:54,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:54,473 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2024-10-10 22:26:54,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 25 [2024-10-10 22:26:54,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:26:54,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:54,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-10 22:26:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:26:54,767 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:26:54,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2024-10-10 22:26:54,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 126 [2024-10-10 22:26:55,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-10-10 22:26:55,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 85 [2024-10-10 22:26:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:26:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448530010] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:26:55,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:26:55,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2024-10-10 22:26:55,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976262792] [2024-10-10 22:26:55,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:26:55,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-10 22:26:55,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:26:55,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-10 22:26:55,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2035, Unknown=0, NotChecked=0, Total=2256 [2024-10-10 22:26:55,745 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 48 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:01,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:27:01,719 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2024-10-10 22:27:01,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-10 22:27:01,721 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-10-10 22:27:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:27:01,722 INFO L225 Difference]: With dead ends: 97 [2024-10-10 22:27:01,722 INFO L226 Difference]: Without dead ends: 95 [2024-10-10 22:27:01,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=728, Invalid=5592, Unknown=0, NotChecked=0, Total=6320 [2024-10-10 22:27:01,727 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 260 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 157 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-10-10 22:27:01,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 342 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 994 Invalid, 2 Unknown, 0 Unchecked, 2.6s Time] [2024-10-10 22:27:01,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-10 22:27:01,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 48. [2024-10-10 22:27:01,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2024-10-10 22:27:01,754 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 23 [2024-10-10 22:27:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:27:01,755 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2024-10-10 22:27:01,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2024-10-10 22:27:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-10 22:27:01,756 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:27:01,756 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:27:01,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-10 22:27:01,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-10 22:27:01,957 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:27:01,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:27:01,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1437770799, now seen corresponding path program 5 times [2024-10-10 22:27:01,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:27:01,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262043670] [2024-10-10 22:27:01,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:27:01,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:27:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:27:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:27:02,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:27:02,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262043670] [2024-10-10 22:27:02,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262043670] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:27:02,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880495601] [2024-10-10 22:27:02,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:27:02,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:02,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:27:02,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:27:02,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 22:27:02,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-10 22:27:02,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:27:02,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-10 22:27:02,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:27:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:27:02,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:27:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:27:02,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880495601] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:27:02,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:27:02,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-10 22:27:02,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846595629] [2024-10-10 22:27:02,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:27:02,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 22:27:02,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:27:02,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 22:27:02,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:27:02,316 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:27:02,582 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2024-10-10 22:27:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-10 22:27:02,583 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-10 22:27:02,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:27:02,583 INFO L225 Difference]: With dead ends: 107 [2024-10-10 22:27:02,583 INFO L226 Difference]: Without dead ends: 86 [2024-10-10 22:27:02,584 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-10-10 22:27:02,585 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:27:02,585 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 117 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:27:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-10 22:27:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2024-10-10 22:27:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-10-10 22:27:02,609 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 24 [2024-10-10 22:27:02,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:27:02,609 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-10-10 22:27:02,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:02,609 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-10-10 22:27:02,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-10 22:27:02,610 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:27:02,610 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:27:02,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-10 22:27:02,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:02,811 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:27:02,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:27:02,812 INFO L85 PathProgramCache]: Analyzing trace with hash -86066566, now seen corresponding path program 1 times [2024-10-10 22:27:02,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:27:02,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797065761] [2024-10-10 22:27:02,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:27:02,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:27:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:27:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:04,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:27:04,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797065761] [2024-10-10 22:27:04,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797065761] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:27:04,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088800239] [2024-10-10 22:27:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:27:04,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:04,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:27:04,226 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:27:04,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 22:27:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:27:04,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-10-10 22:27:04,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:27:04,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:04,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:04,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:27:04,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:04,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:04,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:04,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2024-10-10 22:27:04,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:04,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:04,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:27:04,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2024-10-10 22:27:04,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2024-10-10 22:27:05,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-10-10 22:27:05,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:05,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 331 treesize of output 307 [2024-10-10 22:27:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:05,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088800239] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:27:05,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:27:05,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2024-10-10 22:27:05,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063952798] [2024-10-10 22:27:05,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:27:05,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-10 22:27:05,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:27:05,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-10 22:27:05,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2024-10-10 22:27:05,388 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:07,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:27:07,065 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2024-10-10 22:27:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-10 22:27:07,065 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-10 22:27:07,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:27:07,066 INFO L225 Difference]: With dead ends: 121 [2024-10-10 22:27:07,066 INFO L226 Difference]: Without dead ends: 119 [2024-10-10 22:27:07,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=462, Invalid=3570, Unknown=0, NotChecked=0, Total=4032 [2024-10-10 22:27:07,068 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 106 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-10 22:27:07,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 370 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-10 22:27:07,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-10-10 22:27:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 69. [2024-10-10 22:27:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 68 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2024-10-10 22:27:07,094 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 26 [2024-10-10 22:27:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:27:07,094 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2024-10-10 22:27:07,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2024-10-10 22:27:07,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-10 22:27:07,095 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:27:07,095 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:27:07,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-10 22:27:07,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-10 22:27:07,300 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:27:07,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:27:07,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1608315314, now seen corresponding path program 6 times [2024-10-10 22:27:07,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:27:07,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368929583] [2024-10-10 22:27:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:27:07,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:27:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:27:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:09,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:27:09,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368929583] [2024-10-10 22:27:09,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368929583] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:27:09,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503736767] [2024-10-10 22:27:09,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:27:09,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:09,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:27:09,090 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:27:09,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 22:27:09,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-10 22:27:09,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:27:09,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-10 22:27:09,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:27:09,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:09,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:09,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:27:09,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:09,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-10 22:27:09,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:09,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:09,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:09,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:09,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-10-10 22:27:09,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:27:09,674 INFO L349 Elim1Store]: treesize reduction 36, result has 39.0 percent of original size [2024-10-10 22:27:09,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 39 [2024-10-10 22:27:09,754 INFO L349 Elim1Store]: treesize reduction 62, result has 29.5 percent of original size [2024-10-10 22:27:09,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 44 [2024-10-10 22:27:09,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:09,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:27:09,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:27:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:10,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:27:10,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2024-10-10 22:27:10,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 142 [2024-10-10 22:27:20,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 136 [2024-10-10 22:27:20,819 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:20,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21754 treesize of output 20474 [2024-10-10 22:27:20,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2024-10-10 22:27:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:20,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503736767] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:27:20,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:27:20,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 57 [2024-10-10 22:27:20,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878375699] [2024-10-10 22:27:20,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:27:20,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-10-10 22:27:20,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:27:20,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-10-10 22:27:20,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2932, Unknown=2, NotChecked=0, Total=3192 [2024-10-10 22:27:20,959 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 57 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:26,651 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int#3| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse4 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse7 (* 8 |c_ULTIMATE.start_main_~i~0#1|)) (.cse8 (= c_~N~0 3)) (.cse9 (select .cse2 0)) (.cse11 (select (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse0 (+ .cse9 .cse11)) (.cse1 (not .cse8)) (.cse5 (let ((.cse10 (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse2 .cse10 (+ (select .cse2 .cse10) .cse11)))) (.cse6 (< .cse4 c_~N~0)) (.cse3 (< 3 c_~N~0))) (and (or (= .cse0 4) .cse1) (or (= (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ c_~N~0 1)) .cse3) (forall ((|v_ULTIMATE.start_main_~i~0#1_170| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_170| .cse4) (forall ((|v_ULTIMATE.start_main_~i~0#1_169| Int)) (or (forall ((v_ArrVal_387 Int) (v_ArrVal_385 Int)) (< (select (store (store .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_170|)) v_ArrVal_385) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_169|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_387) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ 3 |v_ULTIMATE.start_main_~i~0#1_169|))) (< 2 |v_ULTIMATE.start_main_~i~0#1_169|) (< |v_ULTIMATE.start_main_~i~0#1_169| (+ |v_ULTIMATE.start_main_~i~0#1_170| 1)))))) (or (= .cse0 3) (< |c_ULTIMATE.start_main_~i~0#1| 2) .cse1) (not (= |c_ULTIMATE.start_main_~i~0#1| 0)) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (or .cse6 (= (select .cse2 .cse7) 1)) (<= 3 c_~N~0) (forall ((|v_ULTIMATE.start_main_~i~0#1_170| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_170| .cse4) (forall ((|v_ULTIMATE.start_main_~i~0#1_169| Int)) (or (< 2 |v_ULTIMATE.start_main_~i~0#1_169|) (< |v_ULTIMATE.start_main_~i~0#1_169| (+ |v_ULTIMATE.start_main_~i~0#1_170| 1)) (forall ((v_ArrVal_387 Int) (v_ArrVal_385 Int)) (< 3 (select (store (store .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_170|)) v_ArrVal_385) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_169|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_387) |c_ULTIMATE.start_main_~a~0#1.offset|))))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (or .cse6 (forall ((v_ArrVal_394 Int)) (= (+ c_~N~0 2) (select (store (select |c_#memory_int#4| |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse7 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_394) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (or (and (<= |c_ULTIMATE.start_main_~i~0#1| 1) (or (not (= |c_ULTIMATE.start_main_~i~0#1| 1)) .cse3)) (and .cse8 (= .cse9 4))))))) is different from false [2024-10-10 22:27:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:27:30,061 INFO L93 Difference]: Finished difference Result 192 states and 225 transitions. [2024-10-10 22:27:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-10-10 22:27:30,061 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-10 22:27:30,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:27:30,062 INFO L225 Difference]: With dead ends: 192 [2024-10-10 22:27:30,062 INFO L226 Difference]: Without dead ends: 176 [2024-10-10 22:27:30,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=952, Invalid=9351, Unknown=3, NotChecked=200, Total=10506 [2024-10-10 22:27:30,065 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 271 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:27:30,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 501 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1575 Invalid, 0 Unknown, 53 Unchecked, 1.3s Time] [2024-10-10 22:27:30,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-10-10 22:27:30,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 88. [2024-10-10 22:27:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 87 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:30,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2024-10-10 22:27:30,100 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 27 [2024-10-10 22:27:30,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:27:30,108 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2024-10-10 22:27:30,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:30,108 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2024-10-10 22:27:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-10 22:27:30,109 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:27:30,109 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:27:30,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-10 22:27:30,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:30,310 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:27:30,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:27:30,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1746261413, now seen corresponding path program 7 times [2024-10-10 22:27:30,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:27:30,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612302565] [2024-10-10 22:27:30,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:27:30,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:27:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:27:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-10 22:27:30,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:27:30,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612302565] [2024-10-10 22:27:30,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612302565] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:27:30,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668855950] [2024-10-10 22:27:30,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 22:27:30,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:30,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:27:30,418 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:27:30,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-10 22:27:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:27:30,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-10 22:27:30,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:27:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-10 22:27:30,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:27:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-10 22:27:30,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668855950] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:27:30,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:27:30,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-10 22:27:30,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269504433] [2024-10-10 22:27:30,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:27:30,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 22:27:30,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:27:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 22:27:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:27:30,605 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:27:30,756 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2024-10-10 22:27:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-10 22:27:30,757 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-10-10 22:27:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:27:30,758 INFO L225 Difference]: With dead ends: 139 [2024-10-10 22:27:30,758 INFO L226 Difference]: Without dead ends: 71 [2024-10-10 22:27:30,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-10-10 22:27:30,759 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:27:30,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:27:30,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-10 22:27:30,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2024-10-10 22:27:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2024-10-10 22:27:30,782 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 28 [2024-10-10 22:27:30,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:27:30,782 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2024-10-10 22:27:30,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2024-10-10 22:27:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-10 22:27:30,784 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:27:30,784 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:27:30,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-10 22:27:30,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-10 22:27:30,985 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:27:30,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:27:30,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1232846792, now seen corresponding path program 8 times [2024-10-10 22:27:30,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:27:30,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214688554] [2024-10-10 22:27:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:27:30,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:27:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:27:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-10 22:27:31,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:27:31,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214688554] [2024-10-10 22:27:31,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214688554] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:27:31,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846241322] [2024-10-10 22:27:31,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:27:31,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:31,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:27:31,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:27:31,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-10 22:27:31,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:27:31,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:27:31,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-10 22:27:31,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:27:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-10 22:27:31,300 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:27:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-10 22:27:31,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846241322] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:27:31,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:27:31,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-10 22:27:31,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680177946] [2024-10-10 22:27:31,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:27:31,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-10 22:27:31,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:27:31,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-10 22:27:31,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-10 22:27:31,362 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:31,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:27:31,556 INFO L93 Difference]: Finished difference Result 142 states and 165 transitions. [2024-10-10 22:27:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-10 22:27:31,556 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-10-10 22:27:31,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:27:31,557 INFO L225 Difference]: With dead ends: 142 [2024-10-10 22:27:31,558 INFO L226 Difference]: Without dead ends: 103 [2024-10-10 22:27:31,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-10-10 22:27:31,558 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 96 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:27:31,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 68 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:27:31,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-10 22:27:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2024-10-10 22:27:31,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2024-10-10 22:27:31,592 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 29 [2024-10-10 22:27:31,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:27:31,592 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2024-10-10 22:27:31,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:31,593 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2024-10-10 22:27:31,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-10 22:27:31,595 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:27:31,595 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:27:31,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-10 22:27:31,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:31,796 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:27:31,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:27:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1338866197, now seen corresponding path program 2 times [2024-10-10 22:27:31,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:27:31,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256038843] [2024-10-10 22:27:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:27:31,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:27:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:27:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:33,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:27:33,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256038843] [2024-10-10 22:27:33,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256038843] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:27:33,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855935314] [2024-10-10 22:27:33,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:27:33,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:33,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:27:33,379 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:27:33,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-10 22:27:33,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:27:33,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:27:33,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-10-10 22:27:33,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:27:33,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:33,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:33,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:27:33,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:33,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-10 22:27:33,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:33,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:33,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:33,949 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:33,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 24 [2024-10-10 22:27:34,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:34,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-10-10 22:27:34,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:27:34,059 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2024-10-10 22:27:34,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 25 [2024-10-10 22:27:34,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:34,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:27:34,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-10 22:27:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:34,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:27:34,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2024-10-10 22:27:34,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2024-10-10 22:27:35,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 136 [2024-10-10 22:27:35,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:35,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 10456 treesize of output 9816 [2024-10-10 22:27:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:35,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855935314] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:27:35,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:27:35,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 56 [2024-10-10 22:27:35,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517483494] [2024-10-10 22:27:35,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:27:35,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-10-10 22:27:35,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:27:35,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-10-10 22:27:35,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2839, Unknown=0, NotChecked=0, Total=3080 [2024-10-10 22:27:35,316 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 56 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:36,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:27:36,657 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2024-10-10 22:27:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-10 22:27:36,658 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 56 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-10-10 22:27:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:27:36,659 INFO L225 Difference]: With dead ends: 95 [2024-10-10 22:27:36,659 INFO L226 Difference]: Without dead ends: 93 [2024-10-10 22:27:36,660 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=405, Invalid=4287, Unknown=0, NotChecked=0, Total=4692 [2024-10-10 22:27:36,661 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-10 22:27:36,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 243 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-10 22:27:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-10 22:27:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2024-10-10 22:27:36,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.160919540229885) internal successors, (101), 87 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2024-10-10 22:27:36,710 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 30 [2024-10-10 22:27:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:27:36,711 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2024-10-10 22:27:36,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 56 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:36,711 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2024-10-10 22:27:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-10 22:27:36,712 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:27:36,712 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:27:36,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-10 22:27:36,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-10 22:27:36,913 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:27:36,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:27:36,913 INFO L85 PathProgramCache]: Analyzing trace with hash -762141898, now seen corresponding path program 9 times [2024-10-10 22:27:36,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:27:36,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653874960] [2024-10-10 22:27:36,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:27:36,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:27:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:27:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-10 22:27:37,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:27:37,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653874960] [2024-10-10 22:27:37,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653874960] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:27:37,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829732951] [2024-10-10 22:27:37,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:27:37,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:37,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:27:37,042 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:27:37,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-10 22:27:37,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-10 22:27:37,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:27:37,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-10 22:27:37,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:27:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-10 22:27:37,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:27:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-10 22:27:37,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829732951] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:27:37,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:27:37,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-10 22:27:37,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919476818] [2024-10-10 22:27:37,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:27:37,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-10 22:27:37,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:27:37,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-10 22:27:37,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-10 22:27:37,283 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:27:37,552 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2024-10-10 22:27:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-10 22:27:37,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-10-10 22:27:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:27:37,553 INFO L225 Difference]: With dead ends: 115 [2024-10-10 22:27:37,553 INFO L226 Difference]: Without dead ends: 91 [2024-10-10 22:27:37,555 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2024-10-10 22:27:37,555 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:27:37,556 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 124 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:27:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-10 22:27:37,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2024-10-10 22:27:37,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2024-10-10 22:27:37,584 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 30 [2024-10-10 22:27:37,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:27:37,585 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2024-10-10 22:27:37,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:37,585 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2024-10-10 22:27:37,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-10 22:27:37,586 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:27:37,586 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:27:37,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-10 22:27:37,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-10 22:27:37,787 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:27:37,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:27:37,787 INFO L85 PathProgramCache]: Analyzing trace with hash -828005335, now seen corresponding path program 10 times [2024-10-10 22:27:37,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:27:37,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100014535] [2024-10-10 22:27:37,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:27:37,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:27:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:27:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:39,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:27:39,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100014535] [2024-10-10 22:27:39,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100014535] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:27:39,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659141745] [2024-10-10 22:27:39,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:27:39,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:39,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:27:39,755 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:27:39,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-10 22:27:39,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:27:39,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:27:39,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-10-10 22:27:39,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:27:39,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:39,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:39,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:27:39,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:39,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-10 22:27:40,006 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:40,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-10-10 22:27:40,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:40,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:40,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:40,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:40,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:40,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-10-10 22:27:40,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:40,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 34 [2024-10-10 22:27:40,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:40,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 24 [2024-10-10 22:27:40,580 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:40,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2024-10-10 22:27:40,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:40,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:27:40,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:27:40,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:27:40,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-10 22:27:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:40,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:27:41,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2024-10-10 22:27:41,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 126 [2024-10-10 22:27:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:27:41,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659141745] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:27:41,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:27:41,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 25] total 66 [2024-10-10 22:27:41,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509169209] [2024-10-10 22:27:41,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:27:41,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-10 22:27:41,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:27:41,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-10 22:27:41,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=3804, Unknown=0, NotChecked=0, Total=4290 [2024-10-10 22:27:41,926 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 66 states, 66 states have (on average 1.196969696969697) internal successors, (79), 66 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:45,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:27:45,334 INFO L93 Difference]: Finished difference Result 176 states and 208 transitions. [2024-10-10 22:27:45,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-10-10 22:27:45,334 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.196969696969697) internal successors, (79), 66 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-10-10 22:27:45,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:27:45,335 INFO L225 Difference]: With dead ends: 176 [2024-10-10 22:27:45,335 INFO L226 Difference]: Without dead ends: 158 [2024-10-10 22:27:45,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3293 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1299, Invalid=9413, Unknown=0, NotChecked=0, Total=10712 [2024-10-10 22:27:45,338 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 235 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:27:45,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 546 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-10 22:27:45,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-10-10 22:27:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2024-10-10 22:27:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2181818181818183) internal successors, (134), 110 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:45,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2024-10-10 22:27:45,382 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 31 [2024-10-10 22:27:45,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:27:45,382 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2024-10-10 22:27:45,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.196969696969697) internal successors, (79), 66 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:45,383 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2024-10-10 22:27:45,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-10 22:27:45,383 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:27:45,383 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:27:45,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-10 22:27:45,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-10 22:27:45,584 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:27:45,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:27:45,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1193171730, now seen corresponding path program 3 times [2024-10-10 22:27:45,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:27:45,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104577547] [2024-10-10 22:27:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:27:45,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:27:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:27:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:47,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:27:47,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104577547] [2024-10-10 22:27:47,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104577547] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:27:47,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541113411] [2024-10-10 22:27:47,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:27:47,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:47,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:27:47,007 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:27:47,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-10 22:27:47,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-10 22:27:47,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:27:47,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-10-10 22:27:47,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:27:47,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:47,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:47,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:27:47,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:47,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-10 22:27:47,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:47,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:47,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-10-10 22:27:47,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:47,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 24 [2024-10-10 22:27:47,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:47,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2024-10-10 22:27:47,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:27:47,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:27:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:47,847 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:27:48,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2024-10-10 22:27:48,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2024-10-10 22:27:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:48,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541113411] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:27:48,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:27:48,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 26] total 58 [2024-10-10 22:27:48,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567361745] [2024-10-10 22:27:48,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:27:48,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-10-10 22:27:48,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:27:48,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-10-10 22:27:48,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=2925, Unknown=0, NotChecked=0, Total=3306 [2024-10-10 22:27:48,670 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 58 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 58 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:27:50,621 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2024-10-10 22:27:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-10-10 22:27:50,622 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 58 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-10-10 22:27:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:27:50,623 INFO L225 Difference]: With dead ends: 136 [2024-10-10 22:27:50,623 INFO L226 Difference]: Without dead ends: 110 [2024-10-10 22:27:50,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=942, Invalid=7068, Unknown=0, NotChecked=0, Total=8010 [2024-10-10 22:27:50,625 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 110 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-10 22:27:50,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 186 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-10 22:27:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-10-10 22:27:50,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2024-10-10 22:27:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 86 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2024-10-10 22:27:50,660 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 33 [2024-10-10 22:27:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:27:50,660 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2024-10-10 22:27:50,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 58 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:50,661 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2024-10-10 22:27:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-10 22:27:50,661 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:27:50,661 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:27:50,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-10 22:27:50,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:50,862 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:27:50,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:27:50,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1282247175, now seen corresponding path program 11 times [2024-10-10 22:27:50,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:27:50,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837727289] [2024-10-10 22:27:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:27:50,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:27:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:27:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 22:27:51,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:27:51,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837727289] [2024-10-10 22:27:51,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837727289] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:27:51,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326979207] [2024-10-10 22:27:51,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:27:51,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:51,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:27:51,038 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:27:51,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-10 22:27:51,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-10 22:27:51,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:27:51,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-10 22:27:51,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:27:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 22:27:51,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:27:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 22:27:51,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326979207] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:27:51,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:27:51,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2024-10-10 22:27:51,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449657394] [2024-10-10 22:27:51,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:27:51,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-10 22:27:51,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:27:51,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-10 22:27:51,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2024-10-10 22:27:51,705 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:52,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:27:52,151 INFO L93 Difference]: Finished difference Result 160 states and 189 transitions. [2024-10-10 22:27:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-10 22:27:52,152 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-10-10 22:27:52,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:27:52,153 INFO L225 Difference]: With dead ends: 160 [2024-10-10 22:27:52,153 INFO L226 Difference]: Without dead ends: 109 [2024-10-10 22:27:52,153 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=1882, Unknown=0, NotChecked=0, Total=2256 [2024-10-10 22:27:52,154 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 236 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:27:52,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 242 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:27:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-10-10 22:27:52,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 67. [2024-10-10 22:27:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2024-10-10 22:27:52,186 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 33 [2024-10-10 22:27:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:27:52,186 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2024-10-10 22:27:52,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:27:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2024-10-10 22:27:52,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-10 22:27:52,187 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:27:52,187 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:27:52,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-10 22:27:52,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-10 22:27:52,388 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:27:52,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:27:52,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1104522662, now seen corresponding path program 4 times [2024-10-10 22:27:52,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:27:52,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056662289] [2024-10-10 22:27:52,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:27:52,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:27:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:27:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:27:54,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:27:54,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056662289] [2024-10-10 22:27:54,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056662289] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:27:54,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855220946] [2024-10-10 22:27:54,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:27:54,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:27:54,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:27:54,113 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:27:54,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-10 22:27:54,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:27:54,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:27:54,221 WARN L253 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-10-10 22:27:54,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:27:54,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-10 22:27:54,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2024-10-10 22:27:54,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:54,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 31 [2024-10-10 22:27:54,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:54,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 48 treesize of output 31 [2024-10-10 22:27:54,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:54,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 29 [2024-10-10 22:27:54,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2024-10-10 22:27:54,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:54,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 20 [2024-10-10 22:27:54,731 INFO L349 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2024-10-10 22:27:54,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 20 [2024-10-10 22:27:54,779 INFO L349 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2024-10-10 22:27:54,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 20 [2024-10-10 22:27:54,864 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 17 treesize of output 13 [2024-10-10 22:27:54,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:54,908 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 48 treesize of output 28 [2024-10-10 22:27:54,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2024-10-10 22:27:54,959 INFO L349 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2024-10-10 22:27:54,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 20 [2024-10-10 22:27:55,023 INFO L349 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2024-10-10 22:27:55,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 20 [2024-10-10 22:27:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:27:55,305 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:27:59,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 118 [2024-10-10 22:27:59,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:27:59,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1120 treesize of output 1108 [2024-10-10 22:28:06,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 122