./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --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 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 09:33:30,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 09:33:30,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 09:33:30,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 09:33:30,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 09:33:30,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 09:33:30,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 09:33:30,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 09:33:30,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 09:33:30,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 09:33:30,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 09:33:30,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 09:33:30,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 09:33:30,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 09:33:30,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 09:33:30,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 09:33:30,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 09:33:30,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 09:33:30,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 09:33:30,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 09:33:30,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 09:33:30,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 09:33:30,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 09:33:30,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 09:33:30,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 09:33:30,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 09:33:30,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 09:33:30,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 09:33:30,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 09:33:30,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 09:33:30,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 09:33:30,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 09:33:30,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 09:33:30,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 09:33:30,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 09:33:30,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 09:33:30,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 09:33:30,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 09:33:30,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 09:33:30,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 09:33:30,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 09:33:30,850 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 09:33:30,869 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 09:33:30,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 09:33:30,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 09:33:30,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 09:33:30,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 09:33:30,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 09:33:30,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 09:33:30,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 09:33:30,871 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 09:33:30,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 09:33:30,872 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 09:33:30,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 09:33:30,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 09:33:30,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 09:33:30,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 09:33:30,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 09:33:30,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 09:33:30,873 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 09:33:30,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 09:33:30,873 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 09:33:30,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 09:33:30,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 09:33:30,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 09:33:30,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 09:33:30,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:33:30,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 09:33:30,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 09:33:30,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 09:33:30,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 09:33:30,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 09:33:30,875 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 09:33:30,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 09:33:30,875 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 09:33:30,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 09:33:30,875 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 09:33:30,875 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 [2023-02-15 09:33:31,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 09:33:31,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 09:33:31,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 09:33:31,067 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 09:33:31,067 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 09:33:31,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum1.c [2023-02-15 09:33:32,074 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 09:33:32,242 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 09:33:32,243 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum1.c [2023-02-15 09:33:32,248 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e6266dbd/c49017dbb53d4cb98d6b792bfea19159/FLAG280280bfb [2023-02-15 09:33:32,264 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e6266dbd/c49017dbb53d4cb98d6b792bfea19159 [2023-02-15 09:33:32,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 09:33:32,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 09:33:32,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 09:33:32,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 09:33:32,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 09:33:32,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:33:32" (1/1) ... [2023-02-15 09:33:32,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4105f098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:33:32, skipping insertion in model container [2023-02-15 09:33:32,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:33:32" (1/1) ... [2023-02-15 09:33:32,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 09:33:32,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 09:33:32,384 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum1.c[400,413] [2023-02-15 09:33:32,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:33:32,402 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 09:33:32,409 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum1.c[400,413] [2023-02-15 09:33:32,412 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:33:32,420 INFO L208 MainTranslator]: Completed translation [2023-02-15 09:33:32,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:33:32 WrapperNode [2023-02-15 09:33:32,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 09:33:32,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 09:33:32,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 09:33:32,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 09:33:32,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:33:32" (1/1) ... [2023-02-15 09:33:32,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:33:32" (1/1) ... [2023-02-15 09:33:32,440 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2023-02-15 09:33:32,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 09:33:32,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 09:33:32,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 09:33:32,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 09:33:32,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:33:32" (1/1) ... [2023-02-15 09:33:32,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:33:32" (1/1) ... [2023-02-15 09:33:32,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:33:32" (1/1) ... [2023-02-15 09:33:32,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:33:32" (1/1) ... [2023-02-15 09:33:32,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:33:32" (1/1) ... [2023-02-15 09:33:32,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:33:32" (1/1) ... [2023-02-15 09:33:32,459 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:33:32" (1/1) ... [2023-02-15 09:33:32,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:33:32" (1/1) ... [2023-02-15 09:33:32,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 09:33:32,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 09:33:32,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 09:33:32,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 09:33:32,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:33:32" (1/1) ... [2023-02-15 09:33:32,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:33:32,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:33:32,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 09:33:32,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 09:33:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 09:33:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 09:33:32,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 09:33:32,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 09:33:32,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 09:33:32,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 09:33:32,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 09:33:32,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 09:33:32,578 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 09:33:32,579 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 09:33:32,711 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 09:33:32,714 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 09:33:32,715 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 09:33:32,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:33:32 BoogieIcfgContainer [2023-02-15 09:33:32,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 09:33:32,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 09:33:32,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 09:33:32,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 09:33:32,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:33:32" (1/3) ... [2023-02-15 09:33:32,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142565fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:33:32, skipping insertion in model container [2023-02-15 09:33:32,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:33:32" (2/3) ... [2023-02-15 09:33:32,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142565fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:33:32, skipping insertion in model container [2023-02-15 09:33:32,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:33:32" (3/3) ... [2023-02-15 09:33:32,721 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum1.c [2023-02-15 09:33:32,731 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 09:33:32,732 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 09:33:32,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 09:33:32,762 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@60e41404, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 09:33:32,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 09:33:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 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) [2023-02-15 09:33:32,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 09:33:32,769 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:32,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:32,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:32,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:32,772 INFO L85 PathProgramCache]: Analyzing trace with hash -718163050, now seen corresponding path program 1 times [2023-02-15 09:33:32,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:32,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235095193] [2023-02-15 09:33:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:32,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:33:32,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:32,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235095193] [2023-02-15 09:33:32,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235095193] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:33:32,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:33:32,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 09:33:32,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592679786] [2023-02-15 09:33:32,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:33:32,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 09:33:32,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:32,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 09:33:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 09:33:32,919 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-02-15 09:33:32,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:33:32,934 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2023-02-15 09:33:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 09:33:32,936 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2023-02-15 09:33:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:33:32,941 INFO L225 Difference]: With dead ends: 35 [2023-02-15 09:33:32,942 INFO L226 Difference]: Without dead ends: 15 [2023-02-15 09:33:32,944 INFO L412 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 [2023-02-15 09:33:32,949 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:33:32,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:33:32,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-15 09:33:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-15 09:33:32,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:33:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-15 09:33:32,969 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2023-02-15 09:33:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:33:32,969 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-15 09:33:32,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-02-15 09:33:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-15 09:33:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 09:33:32,970 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:32,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:32,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 09:33:32,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:32,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:32,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1709876828, now seen corresponding path program 1 times [2023-02-15 09:33:32,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:32,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120514770] [2023-02-15 09:33:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:32,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:33:33,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:33,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120514770] [2023-02-15 09:33:33,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120514770] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:33:33,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:33:33,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 09:33:33,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990414763] [2023-02-15 09:33:33,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:33:33,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 09:33:33,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:33,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 09:33:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:33:33,057 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-02-15 09:33:33,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:33:33,086 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-02-15 09:33:33,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 09:33:33,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2023-02-15 09:33:33,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:33:33,087 INFO L225 Difference]: With dead ends: 27 [2023-02-15 09:33:33,087 INFO L226 Difference]: Without dead ends: 17 [2023-02-15 09:33:33,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:33:33,096 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:33:33,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:33:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-15 09:33:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-02-15 09:33:33,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2023-02-15 09:33:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-02-15 09:33:33,100 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2023-02-15 09:33:33,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:33:33,100 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-02-15 09:33:33,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-02-15 09:33:33,100 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-02-15 09:33:33,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 09:33:33,101 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:33,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:33,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 09:33:33,101 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:33,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:33,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2117745282, now seen corresponding path program 1 times [2023-02-15 09:33:33,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:33,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820090211] [2023-02-15 09:33:33,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:33,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 09:33:33,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:33,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820090211] [2023-02-15 09:33:33,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820090211] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:33:33,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:33:33,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 09:33:33,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306964568] [2023-02-15 09:33:33,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:33:33,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 09:33:33,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:33,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 09:33:33,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 09:33:33,168 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2023-02-15 09:33:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:33:33,190 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-02-15 09:33:33,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 09:33:33,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2023-02-15 09:33:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:33:33,191 INFO L225 Difference]: With dead ends: 27 [2023-02-15 09:33:33,191 INFO L226 Difference]: Without dead ends: 20 [2023-02-15 09:33:33,191 INFO L412 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 [2023-02-15 09:33:33,192 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:33:33,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:33:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-15 09:33:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2023-02-15 09:33:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:33:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-02-15 09:33:33,196 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2023-02-15 09:33:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:33:33,196 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-02-15 09:33:33,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2023-02-15 09:33:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-02-15 09:33:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 09:33:33,197 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:33,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:33,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 09:33:33,197 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:33,198 INFO L85 PathProgramCache]: Analyzing trace with hash -350467326, now seen corresponding path program 1 times [2023-02-15 09:33:33,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:33,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576666646] [2023-02-15 09:33:33,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:33,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:33:33,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:33,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576666646] [2023-02-15 09:33:33,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576666646] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:33:33,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703052637] [2023-02-15 09:33:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:33,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:33,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:33:33,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:33:33,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 09:33:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:33,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 09:33:33,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:33:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:33:33,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:33:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:33:33,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703052637] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:33:33,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:33:33,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 09:33:33,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883486932] [2023-02-15 09:33:33,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:33:33,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 09:33:33,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:33,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 09:33:33,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:33:33,416 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-02-15 09:33:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:33:33,447 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-02-15 09:33:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 09:33:33,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-15 09:33:33,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:33:33,448 INFO L225 Difference]: With dead ends: 33 [2023-02-15 09:33:33,448 INFO L226 Difference]: Without dead ends: 21 [2023-02-15 09:33:33,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:33:33,450 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:33:33,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 29 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:33:33,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-15 09:33:33,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-02-15 09:33:33,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2023-02-15 09:33:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-02-15 09:33:33,458 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2023-02-15 09:33:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:33:33,458 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-02-15 09:33:33,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-02-15 09:33:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-02-15 09:33:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 09:33:33,459 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:33,460 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:33,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 09:33:33,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:33,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:33,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:33,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1584924836, now seen corresponding path program 2 times [2023-02-15 09:33:33,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:33,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085093768] [2023-02-15 09:33:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:33,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 09:33:33,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:33,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085093768] [2023-02-15 09:33:33,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085093768] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:33:33,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265407210] [2023-02-15 09:33:33,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:33:33,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:33,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:33:33,790 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:33:33,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 09:33:33,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:33:33,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:33:33,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 09:33:33,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:33:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 09:33:33,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:33:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 09:33:33,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265407210] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:33:33,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:33:33,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-15 09:33:33,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067511032] [2023-02-15 09:33:33,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:33:33,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 09:33:33,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:33,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 09:33:33,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-15 09:33:33,929 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2023-02-15 09:33:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:33:33,958 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-02-15 09:33:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 09:33:33,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 [2023-02-15 09:33:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:33:33,959 INFO L225 Difference]: With dead ends: 34 [2023-02-15 09:33:33,959 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 09:33:33,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-02-15 09:33:33,960 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:33:33,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 13 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:33:33,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 09:33:33,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-02-15 09:33:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:33:33,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-02-15 09:33:33,963 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2023-02-15 09:33:33,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:33:33,964 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-02-15 09:33:33,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2023-02-15 09:33:33,964 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-02-15 09:33:33,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 09:33:33,964 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:33,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:33,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 09:33:34,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:34,169 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:34,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:34,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1965660968, now seen corresponding path program 3 times [2023-02-15 09:33:34,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:34,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141341520] [2023-02-15 09:33:34,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:34,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:33:34,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:34,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141341520] [2023-02-15 09:33:34,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141341520] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:33:34,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160195420] [2023-02-15 09:33:34,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:33:34,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:34,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:33:34,951 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:33:34,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 09:33:35,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 09:33:35,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:33:35,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 09:33:35,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:33:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:33:35,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:33:35,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:33:35,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 61 [2023-02-15 09:33:35,902 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2023-02-15 09:33:35,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 19 [2023-02-15 09:33:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:33:36,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160195420] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:33:36,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:33:36,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 38 [2023-02-15 09:33:36,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616650267] [2023-02-15 09:33:36,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:33:36,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 09:33:36,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:36,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 09:33:36,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 09:33:36,125 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 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) [2023-02-15 09:33:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:33:36,839 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-02-15 09:33:36,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 09:33:36,839 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 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 [2023-02-15 09:33:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:33:36,840 INFO L225 Difference]: With dead ends: 49 [2023-02-15 09:33:36,840 INFO L226 Difference]: Without dead ends: 45 [2023-02-15 09:33:36,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=338, Invalid=2632, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 09:33:36,841 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:33:36,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 58 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 09:33:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-15 09:33:36,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2023-02-15 09:33:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 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) [2023-02-15 09:33:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-02-15 09:33:36,846 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2023-02-15 09:33:36,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:33:36,846 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-02-15 09:33:36,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 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) [2023-02-15 09:33:36,847 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-02-15 09:33:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 09:33:36,847 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:36,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:36,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 09:33:37,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:37,048 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:37,048 INFO L85 PathProgramCache]: Analyzing trace with hash -732186678, now seen corresponding path program 4 times [2023-02-15 09:33:37,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:37,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455286164] [2023-02-15 09:33:37,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:37,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 09:33:37,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:37,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455286164] [2023-02-15 09:33:37,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455286164] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:33:37,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767652670] [2023-02-15 09:33:37,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:33:37,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:37,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:33:37,127 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:33:37,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 09:33:37,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:33:37,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:33:37,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:33:37,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:33:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 09:33:37,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:33:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 09:33:37,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767652670] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:33:37,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:33:37,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-15 09:33:37,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692598587] [2023-02-15 09:33:37,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:33:37,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 09:33:37,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 09:33:37,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-15 09:33:37,301 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:33:37,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:33:37,421 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2023-02-15 09:33:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 09:33:37,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-15 09:33:37,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:33:37,423 INFO L225 Difference]: With dead ends: 67 [2023-02-15 09:33:37,424 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 09:33:37,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-02-15 09:33:37,425 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 58 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:33:37,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 44 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:33:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 09:33:37,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2023-02-15 09:33:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 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) [2023-02-15 09:33:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-02-15 09:33:37,434 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2023-02-15 09:33:37,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:33:37,434 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-02-15 09:33:37,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:33:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-02-15 09:33:37,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 09:33:37,435 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:37,435 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:37,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 09:33:37,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:37,640 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:37,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:37,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1031419092, now seen corresponding path program 5 times [2023-02-15 09:33:37,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:37,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921716623] [2023-02-15 09:33:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:37,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 09:33:37,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:37,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921716623] [2023-02-15 09:33:37,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921716623] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:33:37,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70200681] [2023-02-15 09:33:37,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:33:37,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:37,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:33:37,736 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:33:37,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 09:33:37,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 09:33:37,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:33:37,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:33:37,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:33:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 09:33:37,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:33:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 09:33:37,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70200681] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:33:37,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:33:37,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-15 09:33:37,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92540544] [2023-02-15 09:33:37,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:33:37,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 09:33:37,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:37,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 09:33:37,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-02-15 09:33:37,916 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:33:37,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:33:37,997 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2023-02-15 09:33:37,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 09:33:37,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 09:33:37,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:33:38,000 INFO L225 Difference]: With dead ends: 36 [2023-02-15 09:33:38,000 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 09:33:38,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-15 09:33:38,002 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:33:38,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 21 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:33:38,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 09:33:38,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-02-15 09:33:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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) [2023-02-15 09:33:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-02-15 09:33:38,008 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2023-02-15 09:33:38,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:33:38,008 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-02-15 09:33:38,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:33:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-02-15 09:33:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 09:33:38,009 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:38,009 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:38,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 09:33:38,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:38,215 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash 996931278, now seen corresponding path program 6 times [2023-02-15 09:33:38,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:38,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857050642] [2023-02-15 09:33:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:38,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:33:39,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:39,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857050642] [2023-02-15 09:33:39,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857050642] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:33:39,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730053077] [2023-02-15 09:33:39,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 09:33:39,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:39,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:33:39,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:33:39,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 09:33:39,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 09:33:39,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:33:39,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 09:33:39,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:33:39,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 09:33:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:33:39,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:33:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 09:33:39,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730053077] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:33:39,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:33:39,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 15] total 43 [2023-02-15 09:33:39,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755697091] [2023-02-15 09:33:39,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:33:39,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 09:33:39,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:39,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 09:33:39,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 09:33:39,776 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:33:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:33:40,388 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2023-02-15 09:33:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 09:33:40,388 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-15 09:33:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:33:40,391 INFO L225 Difference]: With dead ends: 47 [2023-02-15 09:33:40,391 INFO L226 Difference]: Without dead ends: 43 [2023-02-15 09:33:40,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 09:33:40,395 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 09:33:40,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 104 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 09:33:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-15 09:33:40,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2023-02-15 09:33:40,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 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) [2023-02-15 09:33:40,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-02-15 09:33:40,404 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2023-02-15 09:33:40,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:33:40,405 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-02-15 09:33:40,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:33:40,405 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-02-15 09:33:40,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 09:33:40,408 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:40,408 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:40,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 09:33:40,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:40,627 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:40,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:40,628 INFO L85 PathProgramCache]: Analyzing trace with hash 326484464, now seen corresponding path program 7 times [2023-02-15 09:33:40,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:40,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886278589] [2023-02-15 09:33:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:40,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 09:33:40,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:40,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886278589] [2023-02-15 09:33:40,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886278589] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:33:40,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771879152] [2023-02-15 09:33:40,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 09:33:40,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:40,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:33:40,731 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:33:40,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 09:33:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:40,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 09:33:40,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:33:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 09:33:40,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:33:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 09:33:40,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771879152] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:33:40,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:33:40,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-15 09:33:40,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079307023] [2023-02-15 09:33:40,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:33:40,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 09:33:40,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:40,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 09:33:40,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-02-15 09:33:40,902 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2023-02-15 09:33:40,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:33:40,994 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2023-02-15 09:33:40,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 09:33:40,995 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) Word has length 31 [2023-02-15 09:33:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:33:40,995 INFO L225 Difference]: With dead ends: 68 [2023-02-15 09:33:40,995 INFO L226 Difference]: Without dead ends: 38 [2023-02-15 09:33:40,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2023-02-15 09:33:40,996 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:33:40,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 52 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:33:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-15 09:33:40,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-02-15 09:33:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 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) [2023-02-15 09:33:40,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-02-15 09:33:40,999 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 31 [2023-02-15 09:33:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:33:40,999 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-02-15 09:33:40,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2023-02-15 09:33:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-02-15 09:33:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 09:33:41,000 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:41,000 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:41,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 09:33:41,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:41,207 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:41,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:41,207 INFO L85 PathProgramCache]: Analyzing trace with hash -438567918, now seen corresponding path program 8 times [2023-02-15 09:33:41,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:41,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865067284] [2023-02-15 09:33:41,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:41,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 09:33:41,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:41,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865067284] [2023-02-15 09:33:41,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865067284] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:33:41,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390061389] [2023-02-15 09:33:41,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:33:41,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:41,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:33:41,298 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:33:41,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 09:33:41,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:33:41,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:33:41,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 09:33:41,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:33:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 09:33:41,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:33:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 09:33:41,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390061389] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:33:41,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:33:41,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-15 09:33:41,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166586959] [2023-02-15 09:33:41,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:33:41,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 09:33:41,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:41,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 09:33:41,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-02-15 09:33:41,449 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2023-02-15 09:33:41,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:33:41,530 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2023-02-15 09:33:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 09:33:41,530 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) Word has length 33 [2023-02-15 09:33:41,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:33:41,531 INFO L225 Difference]: With dead ends: 52 [2023-02-15 09:33:41,531 INFO L226 Difference]: Without dead ends: 38 [2023-02-15 09:33:41,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2023-02-15 09:33:41,531 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:33:41,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 21 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:33:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-15 09:33:41,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-02-15 09:33:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 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) [2023-02-15 09:33:41,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-02-15 09:33:41,535 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2023-02-15 09:33:41,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:33:41,535 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-02-15 09:33:41,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2023-02-15 09:33:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-02-15 09:33:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 09:33:41,536 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:41,536 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:41,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 09:33:41,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 09:33:41,740 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:41,740 INFO L85 PathProgramCache]: Analyzing trace with hash -827015692, now seen corresponding path program 9 times [2023-02-15 09:33:41,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:41,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438549608] [2023-02-15 09:33:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:41,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:33:42,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:42,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438549608] [2023-02-15 09:33:42,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438549608] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:33:42,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103480588] [2023-02-15 09:33:42,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:33:42,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:42,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:33:42,808 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:33:42,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 09:33:42,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 09:33:42,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:33:42,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-15 09:33:42,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:33:43,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:33:43,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:33:43,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 39 [2023-02-15 09:33:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 09:33:43,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:33:45,724 INFO L321 Elim1Store]: treesize reduction 146, result has 39.4 percent of original size [2023-02-15 09:33:45,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 74 treesize of output 107 [2023-02-15 09:33:45,829 INFO L321 Elim1Store]: treesize reduction 224, result has 7.1 percent of original size [2023-02-15 09:33:45,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 31 [2023-02-15 09:33:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 09:33:46,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103480588] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:33:46,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:33:46,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 70 [2023-02-15 09:33:46,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829149163] [2023-02-15 09:33:46,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:33:46,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-02-15 09:33:46,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:46,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-02-15 09:33:46,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=4404, Unknown=0, NotChecked=0, Total=4830 [2023-02-15 09:33:46,060 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 70 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 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) [2023-02-15 09:33:50,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:33:50,847 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2023-02-15 09:33:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-15 09:33:50,848 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 09:33:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:33:50,848 INFO L225 Difference]: With dead ends: 55 [2023-02-15 09:33:50,848 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 09:33:50,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2417 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=883, Invalid=8623, Unknown=0, NotChecked=0, Total=9506 [2023-02-15 09:33:50,850 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 53 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 09:33:50,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 85 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 09:33:50,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 09:33:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2023-02-15 09:33:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 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) [2023-02-15 09:33:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-02-15 09:33:50,855 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2023-02-15 09:33:50,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:33:50,855 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-02-15 09:33:50,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 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) [2023-02-15 09:33:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-02-15 09:33:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 09:33:50,856 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:50,856 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:50,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 09:33:51,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:51,060 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:51,061 INFO L85 PathProgramCache]: Analyzing trace with hash -139896938, now seen corresponding path program 10 times [2023-02-15 09:33:51,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:51,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356417359] [2023-02-15 09:33:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:51,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 09:33:51,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:51,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356417359] [2023-02-15 09:33:51,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356417359] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:33:51,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509074192] [2023-02-15 09:33:51,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:33:51,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:51,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:33:51,160 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:33:51,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 09:33:51,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:33:51,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:33:51,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 09:33:51,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:33:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 09:33:51,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:33:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 09:33:51,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509074192] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:33:51,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:33:51,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-02-15 09:33:51,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473791187] [2023-02-15 09:33:51,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:33:51,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 09:33:51,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:51,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 09:33:51,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-02-15 09:33:51,446 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 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) [2023-02-15 09:33:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:33:51,637 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2023-02-15 09:33:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 09:33:51,637 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-15 09:33:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:33:51,637 INFO L225 Difference]: With dead ends: 95 [2023-02-15 09:33:51,637 INFO L226 Difference]: Without dead ends: 49 [2023-02-15 09:33:51,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 09:33:51,638 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 75 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:33:51,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 53 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:33:51,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-15 09:33:51,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2023-02-15 09:33:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:33:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-02-15 09:33:51,642 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2023-02-15 09:33:51,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:33:51,642 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-02-15 09:33:51,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 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) [2023-02-15 09:33:51,643 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-02-15 09:33:51,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 09:33:51,643 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:51,643 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:51,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 09:33:51,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 09:33:51,844 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:51,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:51,844 INFO L85 PathProgramCache]: Analyzing trace with hash 38479864, now seen corresponding path program 11 times [2023-02-15 09:33:51,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:51,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584317610] [2023-02-15 09:33:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:51,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 09:33:51,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:51,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584317610] [2023-02-15 09:33:51,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584317610] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:33:51,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781975429] [2023-02-15 09:33:51,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:33:51,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:51,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:33:51,966 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:33:51,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 09:33:52,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 09:33:52,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:33:52,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 09:33:52,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:33:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 09:33:52,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:33:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 09:33:52,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781975429] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:33:52,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:33:52,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-02-15 09:33:52,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660416752] [2023-02-15 09:33:52,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:33:52,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 09:33:52,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:52,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 09:33:52,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-02-15 09:33:52,224 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 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) [2023-02-15 09:33:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:33:52,368 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2023-02-15 09:33:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 09:33:52,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 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 39 [2023-02-15 09:33:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:33:52,369 INFO L225 Difference]: With dead ends: 48 [2023-02-15 09:33:52,369 INFO L226 Difference]: Without dead ends: 44 [2023-02-15 09:33:52,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2023-02-15 09:33:52,370 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 129 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:33:52,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 28 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:33:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-15 09:33:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-02-15 09:33:52,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 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) [2023-02-15 09:33:52,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-02-15 09:33:52,374 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2023-02-15 09:33:52,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:33:52,374 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-02-15 09:33:52,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 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) [2023-02-15 09:33:52,374 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-02-15 09:33:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 09:33:52,374 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:33:52,375 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:33:52,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 09:33:52,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 09:33:52,580 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:33:52,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:33:52,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1622323046, now seen corresponding path program 12 times [2023-02-15 09:33:52,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:33:52,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235949248] [2023-02-15 09:33:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:33:52,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:33:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:33:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:33:54,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:33:54,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235949248] [2023-02-15 09:33:54,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235949248] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:33:54,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702620556] [2023-02-15 09:33:54,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 09:33:54,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:33:54,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:33:54,114 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:33:54,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 09:33:54,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-02-15 09:33:54,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:33:54,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-15 09:33:54,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:33:54,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 09:33:55,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:33:55,365 INFO L350 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 17 treesize of output 18 [2023-02-15 09:33:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 09:33:55,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:33:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 09:33:59,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702620556] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:33:59,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:33:59,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 27] total 80 [2023-02-15 09:33:59,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690897590] [2023-02-15 09:33:59,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:33:59,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-02-15 09:33:59,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:33:59,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-02-15 09:33:59,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=5949, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 09:33:59,578 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 80 states, 80 states have (on average 1.2875) internal successors, (103), 80 states have internal predecessors, (103), 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) [2023-02-15 09:34:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:34:03,326 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2023-02-15 09:34:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 09:34:03,327 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2875) internal successors, (103), 80 states have internal predecessors, (103), 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 41 [2023-02-15 09:34:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:34:03,327 INFO L225 Difference]: With dead ends: 63 [2023-02-15 09:34:03,327 INFO L226 Difference]: Without dead ends: 59 [2023-02-15 09:34:03,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2846 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=831, Invalid=12509, Unknown=0, NotChecked=0, Total=13340 [2023-02-15 09:34:03,330 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:34:03,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 117 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 09:34:03,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-15 09:34:03,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2023-02-15 09:34:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:34:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-02-15 09:34:03,338 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2023-02-15 09:34:03,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:34:03,339 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-02-15 09:34:03,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2875) internal successors, (103), 80 states have internal predecessors, (103), 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) [2023-02-15 09:34:03,339 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-02-15 09:34:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 09:34:03,340 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:34:03,340 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:34:03,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-15 09:34:03,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 09:34:03,544 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:34:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:34:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash 73914556, now seen corresponding path program 13 times [2023-02-15 09:34:03,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:34:03,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361348281] [2023-02-15 09:34:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:34:03,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:34:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:34:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 09:34:03,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:34:03,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361348281] [2023-02-15 09:34:03,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361348281] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:34:03,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758886467] [2023-02-15 09:34:03,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 09:34:03,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:34:03,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:34:03,669 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:34:03,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 09:34:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:34:03,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 09:34:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:34:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 09:34:03,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:34:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 09:34:03,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758886467] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:34:03,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:34:03,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-02-15 09:34:03,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113488721] [2023-02-15 09:34:03,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:34:03,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 09:34:03,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:34:03,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 09:34:03,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-02-15 09:34:03,861 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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) [2023-02-15 09:34:03,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:34:03,962 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2023-02-15 09:34:03,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 09:34:03,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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 43 [2023-02-15 09:34:03,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:34:03,963 INFO L225 Difference]: With dead ends: 92 [2023-02-15 09:34:03,963 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 09:34:03,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 66 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2023-02-15 09:34:03,964 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:34:03,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 50 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:34:03,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 09:34:03,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-02-15 09:34:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 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) [2023-02-15 09:34:03,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2023-02-15 09:34:03,989 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 43 [2023-02-15 09:34:03,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:34:03,990 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2023-02-15 09:34:03,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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) [2023-02-15 09:34:03,990 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2023-02-15 09:34:03,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 09:34:03,992 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:34:03,992 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:34:03,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 09:34:04,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 09:34:04,196 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:34:04,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:34:04,197 INFO L85 PathProgramCache]: Analyzing trace with hash -894570530, now seen corresponding path program 14 times [2023-02-15 09:34:04,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:34:04,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675680677] [2023-02-15 09:34:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:34:04,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:34:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:34:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 09:34:04,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:34:04,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675680677] [2023-02-15 09:34:04,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675680677] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:34:04,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382080786] [2023-02-15 09:34:04,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:34:04,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:34:04,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:34:04,310 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:34:04,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 09:34:04,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:34:04,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:34:04,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 09:34:04,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:34:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 09:34:04,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:34:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 09:34:04,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382080786] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:34:04,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:34:04,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-02-15 09:34:04,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950159302] [2023-02-15 09:34:04,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:34:04,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 09:34:04,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:34:04,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 09:34:04,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-02-15 09:34:04,526 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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) [2023-02-15 09:34:04,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:34:04,614 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2023-02-15 09:34:04,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 09:34:04,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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 45 [2023-02-15 09:34:04,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:34:04,615 INFO L225 Difference]: With dead ends: 68 [2023-02-15 09:34:04,615 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 09:34:04,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 70 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2023-02-15 09:34:04,616 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:34:04,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 24 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:34:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 09:34:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2023-02-15 09:34:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:34:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-02-15 09:34:04,622 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2023-02-15 09:34:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:34:04,622 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-02-15 09:34:04,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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) [2023-02-15 09:34:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-02-15 09:34:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 09:34:04,623 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:34:04,623 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:34:04,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-15 09:34:04,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:34:04,827 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:34:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:34:04,828 INFO L85 PathProgramCache]: Analyzing trace with hash 49745600, now seen corresponding path program 15 times [2023-02-15 09:34:04,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:34:04,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46336612] [2023-02-15 09:34:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:34:04,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:34:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:34:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:34:06,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:34:06,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46336612] [2023-02-15 09:34:06,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46336612] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:34:06,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015819689] [2023-02-15 09:34:06,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:34:06,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:34:06,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:34:06,683 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:34:06,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 09:34:06,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-15 09:34:06,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:34:06,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-15 09:34:06,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:34:06,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 09:34:09,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:34:10,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:34:10,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:34:10,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:34:10,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:34:10,024 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:34:10,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 50 treesize of output 87 [2023-02-15 09:34:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 11 proven. 72 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 09:34:10,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:34:13,932 INFO L350 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 219 treesize of output 195 [2023-02-15 09:34:14,187 INFO L321 Elim1Store]: treesize reduction 144, result has 52.2 percent of original size [2023-02-15 09:34:14,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 5733 treesize of output 3842