./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mbpr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-tiling/mbpr5.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 5503daab190ef8b57bdc3b49ed300bfd661cba05f76774439c2c92cf1668f08b --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:21:54,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:21:54,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:21:54,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:21:54,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:21:54,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:21:54,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:21:54,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:21:54,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:21:54,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:21:54,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:21:54,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:21:54,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:21:54,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:21:54,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:21:54,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:21:54,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:21:54,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:21:54,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:21:54,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:21:54,334 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:21:54,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:21:54,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:21:54,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:21:54,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:21:54,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:21:54,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:21:54,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:21:54,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:21:54,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:21:54,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:21:54,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:21:54,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:21:54,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:21:54,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:21:54,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:21:54,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:21:54,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:21:54,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:21:54,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:21:54,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:21:54,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:21:54,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:21:54,363 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:21:54,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:21:54,364 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:21:54,364 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:21:54,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:21:54,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:21:54,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:21:54,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:21:54,365 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:21:54,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:21:54,366 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:21:54,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:21:54,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:21:54,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:21:54,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:21:54,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:21:54,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:21:54,367 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:21:54,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:21:54,368 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:21:54,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:21:54,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:21:54,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:21:54,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:21:54,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:21:54,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:21:54,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:21:54,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:21:54,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:21:54,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:21:54,371 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:21:54,371 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:21:54,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:21:54,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5503daab190ef8b57bdc3b49ed300bfd661cba05f76774439c2c92cf1668f08b [2022-07-11 22:21:54,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:21:54,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:21:54,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:21:54,569 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:21:54,569 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:21:54,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mbpr5.c [2022-07-11 22:21:54,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e87a9405/4fd83ae6bac34833852d508dc5e14adf/FLAGe50fd396f [2022-07-11 22:21:55,004 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:21:55,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr5.c [2022-07-11 22:21:55,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e87a9405/4fd83ae6bac34833852d508dc5e14adf/FLAGe50fd396f [2022-07-11 22:21:55,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e87a9405/4fd83ae6bac34833852d508dc5e14adf [2022-07-11 22:21:55,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:21:55,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:21:55,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:21:55,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:21:55,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:21:55,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:21:55" (1/1) ... [2022-07-11 22:21:55,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b52e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:21:55, skipping insertion in model container [2022-07-11 22:21:55,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:21:55" (1/1) ... [2022-07-11 22:21:55,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:21:55,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:21:55,191 WARN L230 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-tiling/mbpr5.c[396,409] [2022-07-11 22:21:55,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:21:55,241 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:21:55,249 WARN L230 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-tiling/mbpr5.c[396,409] [2022-07-11 22:21:55,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:21:55,283 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:21:55,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:21:55 WrapperNode [2022-07-11 22:21:55,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:21:55,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:21:55,284 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:21:55,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:21:55,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:21:55" (1/1) ... [2022-07-11 22:21:55,296 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:21:55" (1/1) ... [2022-07-11 22:21:55,319 INFO L137 Inliner]: procedures = 15, calls = 64, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 173 [2022-07-11 22:21:55,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:21:55,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:21:55,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:21:55,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:21:55,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:21:55" (1/1) ... [2022-07-11 22:21:55,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:21:55" (1/1) ... [2022-07-11 22:21:55,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:21:55" (1/1) ... [2022-07-11 22:21:55,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:21:55" (1/1) ... [2022-07-11 22:21:55,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:21:55" (1/1) ... [2022-07-11 22:21:55,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:21:55" (1/1) ... [2022-07-11 22:21:55,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:21:55" (1/1) ... [2022-07-11 22:21:55,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:21:55,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:21:55,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:21:55,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:21:55,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:21:55" (1/1) ... [2022-07-11 22:21:55,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:21:55,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:21:55,396 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) [2022-07-11 22:21:55,415 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 [2022-07-11 22:21:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:21:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:21:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 22:21:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:21:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:21:55,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:21:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:21:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 22:21:55,489 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:21:55,490 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:21:55,715 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:21:55,720 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:21:55,720 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-11 22:21:55,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:21:55 BoogieIcfgContainer [2022-07-11 22:21:55,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:21:55,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:21:55,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:21:55,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:21:55,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:21:55" (1/3) ... [2022-07-11 22:21:55,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37dd1fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:21:55, skipping insertion in model container [2022-07-11 22:21:55,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:21:55" (2/3) ... [2022-07-11 22:21:55,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37dd1fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:21:55, skipping insertion in model container [2022-07-11 22:21:55,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:21:55" (3/3) ... [2022-07-11 22:21:55,728 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr5.c [2022-07-11 22:21:55,738 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:21:55,738 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:21:55,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:21:55,780 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3d3a5161, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7659397a [2022-07-11 22:21:55,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:21:55,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 43 states have internal predecessors, (65), 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) [2022-07-11 22:21:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-11 22:21:55,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:21:55,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:21:55,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:21:55,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:21:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1087925893, now seen corresponding path program 1 times [2022-07-11 22:21:55,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:21:55,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204414142] [2022-07-11 22:21:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:21:55,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:21:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:21:55,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:21:55,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204414142] [2022-07-11 22:21:55,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204414142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:21:55,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:21:55,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 22:21:55,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23326986] [2022-07-11 22:21:55,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:21:55,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 22:21:55,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:21:55,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 22:21:55,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:21:55,991 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 43 states have internal predecessors, (65), 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 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:21:56,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:21:56,012 INFO L93 Difference]: Finished difference Result 83 states and 122 transitions. [2022-07-11 22:21:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 22:21:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-11 22:21:56,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:21:56,028 INFO L225 Difference]: With dead ends: 83 [2022-07-11 22:21:56,028 INFO L226 Difference]: Without dead ends: 39 [2022-07-11 22:21:56,031 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 [2022-07-11 22:21:56,036 INFO L413 NwaCegarLoop]: 57 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, 57 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 [2022-07-11 22:21:56,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:21:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-11 22:21:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-11 22:21:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 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) [2022-07-11 22:21:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2022-07-11 22:21:56,068 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 21 [2022-07-11 22:21:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:21:56,068 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2022-07-11 22:21:56,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:21:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2022-07-11 22:21:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-11 22:21:56,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:21:56,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:21:56,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 22:21:56,078 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:21:56,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:21:56,079 INFO L85 PathProgramCache]: Analyzing trace with hash -30028973, now seen corresponding path program 1 times [2022-07-11 22:21:56,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:21:56,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374357051] [2022-07-11 22:21:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:21:56,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:21:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:21:56,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:21:56,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374357051] [2022-07-11 22:21:56,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374357051] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:21:56,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:21:56,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 22:21:56,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947673891] [2022-07-11 22:21:56,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:21:56,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 22:21:56,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:21:56,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 22:21:56,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:21:56,164 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:21:56,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:21:56,195 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-07-11 22:21:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 22:21:56,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-11 22:21:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:21:56,197 INFO L225 Difference]: With dead ends: 48 [2022-07-11 22:21:56,197 INFO L226 Difference]: Without dead ends: 46 [2022-07-11 22:21:56,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:21:56,203 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 9 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:21:56,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 140 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:21:56,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-11 22:21:56,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-07-11 22:21:56,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.3) internal successors, (52), 40 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) [2022-07-11 22:21:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2022-07-11 22:21:56,207 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 21 [2022-07-11 22:21:56,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:21:56,207 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2022-07-11 22:21:56,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:21:56,207 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2022-07-11 22:21:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-11 22:21:56,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:21:56,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:21:56,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 22:21:56,208 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:21:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:21:56,209 INFO L85 PathProgramCache]: Analyzing trace with hash -29969391, now seen corresponding path program 1 times [2022-07-11 22:21:56,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:21:56,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555274090] [2022-07-11 22:21:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:21:56,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:21:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:21:56,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:21:56,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555274090] [2022-07-11 22:21:56,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555274090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:21:56,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:21:56,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 22:21:56,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180954116] [2022-07-11 22:21:56,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:21:56,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 22:21:56,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:21:56,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 22:21:56,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:21:56,383 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:21:56,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:21:56,503 INFO L93 Difference]: Finished difference Result 92 states and 122 transitions. [2022-07-11 22:21:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 22:21:56,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-11 22:21:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:21:56,504 INFO L225 Difference]: With dead ends: 92 [2022-07-11 22:21:56,505 INFO L226 Difference]: Without dead ends: 61 [2022-07-11 22:21:56,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:21:56,507 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:21:56,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 25 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:21:56,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-11 22:21:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2022-07-11 22:21:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 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) [2022-07-11 22:21:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-07-11 22:21:56,513 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2022-07-11 22:21:56,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:21:56,513 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-07-11 22:21:56,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:21:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-07-11 22:21:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-11 22:21:56,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:21:56,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:21:56,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 22:21:56,515 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:21:56,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:21:56,515 INFO L85 PathProgramCache]: Analyzing trace with hash -175217928, now seen corresponding path program 1 times [2022-07-11 22:21:56,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:21:56,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938780257] [2022-07-11 22:21:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:21:56,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:21:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 22:21:56,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:21:56,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938780257] [2022-07-11 22:21:56,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938780257] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:21:56,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:21:56,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:21:56,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671971687] [2022-07-11 22:21:56,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:21:56,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:21:56,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:21:56,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:21:56,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:21:56,668 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 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) [2022-07-11 22:21:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:21:56,692 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-07-11 22:21:56,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:21:56,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 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 41 [2022-07-11 22:21:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:21:56,693 INFO L225 Difference]: With dead ends: 61 [2022-07-11 22:21:56,693 INFO L226 Difference]: Without dead ends: 46 [2022-07-11 22:21:56,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:21:56,695 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 40 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 [2022-07-11 22:21:56,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 40 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:21:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-11 22:21:56,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-11 22:21:56,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 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) [2022-07-11 22:21:56,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-07-11 22:21:56,706 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 41 [2022-07-11 22:21:56,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:21:56,706 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-07-11 22:21:56,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 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) [2022-07-11 22:21:56,707 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-07-11 22:21:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-11 22:21:56,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:21:56,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:21:56,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-11 22:21:56,708 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:21:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:21:56,710 INFO L85 PathProgramCache]: Analyzing trace with hash -568244938, now seen corresponding path program 1 times [2022-07-11 22:21:56,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:21:56,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116839571] [2022-07-11 22:21:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:21:56,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:21:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:21:57,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:21:57,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116839571] [2022-07-11 22:21:57,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116839571] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:21:57,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258503075] [2022-07-11 22:21:57,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:21:57,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:21:57,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:21:57,126 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) [2022-07-11 22:21:57,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:21:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:57,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-11 22:21:57,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:21:57,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:21:57,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2022-07-11 22:21:57,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:21:57,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2022-07-11 22:21:57,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:21:57,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2022-07-11 22:21:57,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:21:57,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2022-07-11 22:21:57,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:21:57,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:21:57,675 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 22:21:57,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 50 [2022-07-11 22:21:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:21:57,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:21:58,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 13 [2022-07-11 22:21:58,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-11 22:21:58,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-07-11 22:21:58,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2022-07-11 22:21:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:21:58,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258503075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:21:58,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:21:58,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11] total 25 [2022-07-11 22:21:58,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463789677] [2022-07-11 22:21:58,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:21:58,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 22:21:58,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:21:58,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 22:21:58,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-07-11 22:21:58,460 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 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) [2022-07-11 22:21:59,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:21:59,686 INFO L93 Difference]: Finished difference Result 225 states and 268 transitions. [2022-07-11 22:21:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-11 22:21:59,686 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 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 [2022-07-11 22:21:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:21:59,687 INFO L225 Difference]: With dead ends: 225 [2022-07-11 22:21:59,688 INFO L226 Difference]: Without dead ends: 186 [2022-07-11 22:21:59,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 83 SyntacticMatches, 12 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=942, Invalid=3348, Unknown=0, NotChecked=0, Total=4290 [2022-07-11 22:21:59,690 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 625 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:21:59,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 140 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 418 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-07-11 22:21:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-11 22:21:59,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 71. [2022-07-11 22:21:59,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 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) [2022-07-11 22:21:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2022-07-11 22:21:59,697 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 41 [2022-07-11 22:21:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:21:59,698 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2022-07-11 22:21:59,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 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) [2022-07-11 22:21:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2022-07-11 22:21:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-11 22:21:59,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:21:59,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:21:59,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 22:21:59,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:21:59,916 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:21:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:21:59,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1692770569, now seen corresponding path program 1 times [2022-07-11 22:21:59,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:21:59,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311680642] [2022-07-11 22:21:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:21:59,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:21:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:22:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:22:00,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:22:00,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311680642] [2022-07-11 22:22:00,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311680642] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:22:00,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572373061] [2022-07-11 22:22:00,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:22:00,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:22:00,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:22:00,132 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) [2022-07-11 22:22:00,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:22:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:22:00,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-11 22:22:00,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:22:00,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:22:00,302 INFO L356 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2022-07-11 22:22:00,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 47 [2022-07-11 22:22:00,358 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:22:00,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:22:00,385 INFO L356 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2022-07-11 22:22:00,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 41 [2022-07-11 22:22:00,411 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:22:00,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:22:00,441 INFO L356 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2022-07-11 22:22:00,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 41 [2022-07-11 22:22:00,471 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:22:00,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:22:00,529 INFO L356 Elim1Store]: treesize reduction 308, result has 10.2 percent of original size [2022-07-11 22:22:00,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 50 [2022-07-11 22:22:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 22:22:00,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:22:01,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-07-11 22:22:01,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-07-11 22:22:01,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 15 [2022-07-11 22:22:01,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:22:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:22:01,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572373061] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:22:01,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:22:01,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 12] total 26 [2022-07-11 22:22:01,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102717177] [2022-07-11 22:22:01,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:22:01,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-11 22:22:01,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:22:01,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-11 22:22:01,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-07-11 22:22:01,197 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 26 states, 26 states have (on average 5.115384615384615) internal successors, (133), 26 states have internal predecessors, (133), 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) [2022-07-11 22:22:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:22:01,790 INFO L93 Difference]: Finished difference Result 172 states and 210 transitions. [2022-07-11 22:22:01,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-11 22:22:01,791 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.115384615384615) internal successors, (133), 26 states have internal predecessors, (133), 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 47 [2022-07-11 22:22:01,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:22:01,792 INFO L225 Difference]: With dead ends: 172 [2022-07-11 22:22:01,792 INFO L226 Difference]: Without dead ends: 114 [2022-07-11 22:22:01,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 83 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2022-07-11 22:22:01,793 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 270 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:22:01,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 105 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 467 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2022-07-11 22:22:01,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-11 22:22:01,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 77. [2022-07-11 22:22:01,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 76 states have internal predecessors, (92), 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) [2022-07-11 22:22:01,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2022-07-11 22:22:01,801 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 47 [2022-07-11 22:22:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:22:01,801 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2022-07-11 22:22:01,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.115384615384615) internal successors, (133), 26 states have internal predecessors, (133), 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) [2022-07-11 22:22:01,801 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2022-07-11 22:22:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-11 22:22:01,802 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:22:01,802 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:22:01,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:22:02,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-11 22:22:02,015 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:22:02,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:22:02,016 INFO L85 PathProgramCache]: Analyzing trace with hash 964465308, now seen corresponding path program 2 times [2022-07-11 22:22:02,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:22:02,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786213872] [2022-07-11 22:22:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:22:02,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:22:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:22:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 22:22:02,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:22:02,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786213872] [2022-07-11 22:22:02,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786213872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:22:02,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852081788] [2022-07-11 22:22:02,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:22:02,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:22:02,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:22:02,231 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) [2022-07-11 22:22:02,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:22:02,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:22:02,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:22:02,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-11 22:22:02,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:22:02,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:22:02,417 INFO L356 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2022-07-11 22:22:02,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 47 [2022-07-11 22:22:02,455 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:22:02,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:22:02,486 INFO L356 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2022-07-11 22:22:02,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 41 [2022-07-11 22:22:02,518 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:22:02,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:22:02,576 INFO L356 Elim1Store]: treesize reduction 308, result has 10.2 percent of original size [2022-07-11 22:22:02,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 50 [2022-07-11 22:22:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 22:22:02,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:22:03,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 15 [2022-07-11 22:22:03,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:22:03,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-07-11 22:22:03,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-07-11 22:22:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:22:03,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852081788] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:22:03,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:22:03,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 13] total 29 [2022-07-11 22:22:03,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592367013] [2022-07-11 22:22:03,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:22:03,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-11 22:22:03,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:22:03,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-11 22:22:03,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-07-11 22:22:03,256 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 29 states, 29 states have (on average 5.206896551724138) internal successors, (151), 29 states have internal predecessors, (151), 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) [2022-07-11 22:22:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:22:04,461 INFO L93 Difference]: Finished difference Result 222 states and 264 transitions. [2022-07-11 22:22:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-11 22:22:04,461 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.206896551724138) internal successors, (151), 29 states have internal predecessors, (151), 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 53 [2022-07-11 22:22:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:22:04,463 INFO L225 Difference]: With dead ends: 222 [2022-07-11 22:22:04,463 INFO L226 Difference]: Without dead ends: 164 [2022-07-11 22:22:04,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 89 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=727, Invalid=2813, Unknown=0, NotChecked=0, Total=3540 [2022-07-11 22:22:04,464 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 351 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:22:04,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 167 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 795 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-07-11 22:22:04,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-11 22:22:04,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 97. [2022-07-11 22:22:04,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1875) internal successors, (114), 96 states have internal predecessors, (114), 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) [2022-07-11 22:22:04,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-07-11 22:22:04,475 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 53 [2022-07-11 22:22:04,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:22:04,475 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-07-11 22:22:04,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.206896551724138) internal successors, (151), 29 states have internal predecessors, (151), 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) [2022-07-11 22:22:04,475 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-07-11 22:22:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 22:22:04,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:22:04,476 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:22:04,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-11 22:22:04,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:22:04,688 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:22:04,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:22:04,688 INFO L85 PathProgramCache]: Analyzing trace with hash -477181457, now seen corresponding path program 3 times [2022-07-11 22:22:04,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:22:04,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696934202] [2022-07-11 22:22:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:22:04,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:22:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:22:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:22:04,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:22:04,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696934202] [2022-07-11 22:22:04,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696934202] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:22:04,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224319940] [2022-07-11 22:22:04,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:22:04,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:22:04,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:22:04,917 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) [2022-07-11 22:22:04,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:22:05,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-11 22:22:05,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:22:05,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-11 22:22:05,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:22:05,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:22:05,275 INFO L356 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2022-07-11 22:22:05,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 47 [2022-07-11 22:22:05,325 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:22:05,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:22:05,357 INFO L356 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2022-07-11 22:22:05,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 41 [2022-07-11 22:22:05,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2022-07-11 22:22:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:22:05,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:22:05,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 15 [2022-07-11 22:22:05,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:22:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 22:22:05,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224319940] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:22:05,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:22:05,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-07-11 22:22:05,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24794600] [2022-07-11 22:22:05,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:22:05,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 22:22:05,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:22:05,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 22:22:05,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-07-11 22:22:05,724 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 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) [2022-07-11 22:22:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:22:06,418 INFO L93 Difference]: Finished difference Result 327 states and 378 transitions. [2022-07-11 22:22:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-11 22:22:06,418 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 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 59 [2022-07-11 22:22:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:22:06,419 INFO L225 Difference]: With dead ends: 327 [2022-07-11 22:22:06,419 INFO L226 Difference]: Without dead ends: 256 [2022-07-11 22:22:06,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 103 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2022-07-11 22:22:06,421 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 172 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:22:06,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 289 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 865 Invalid, 0 Unknown, 96 Unchecked, 0.5s Time] [2022-07-11 22:22:06,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-11 22:22:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 129. [2022-07-11 22:22:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.171875) internal successors, (150), 128 states have internal predecessors, (150), 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) [2022-07-11 22:22:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2022-07-11 22:22:06,444 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 59 [2022-07-11 22:22:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:22:06,446 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2022-07-11 22:22:06,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 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) [2022-07-11 22:22:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2022-07-11 22:22:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-11 22:22:06,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:22:06,451 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:22:06,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 22:22:06,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:22:06,664 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:22:06,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:22:06,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1869859285, now seen corresponding path program 4 times [2022-07-11 22:22:06,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:22:06,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378629428] [2022-07-11 22:22:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:22:06,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:22:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:22:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 22:22:06,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:22:06,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378629428] [2022-07-11 22:22:06,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378629428] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:22:06,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314811144] [2022-07-11 22:22:06,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:22:06,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:22:06,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:22:06,908 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) [2022-07-11 22:22:06,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 22:22:06,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:22:06,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:22:06,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 22:22:06,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:22:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 22:22:07,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:22:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 22:22:07,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314811144] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:22:07,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:22:07,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2022-07-11 22:22:07,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199698001] [2022-07-11 22:22:07,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:22:07,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-11 22:22:07,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:22:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-11 22:22:07,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2022-07-11 22:22:07,611 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 34 states, 34 states have (on average 5.911764705882353) internal successors, (201), 34 states have internal predecessors, (201), 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) [2022-07-11 22:22:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:22:07,971 INFO L93 Difference]: Finished difference Result 355 states and 408 transitions. [2022-07-11 22:22:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 22:22:07,971 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.911764705882353) internal successors, (201), 34 states have internal predecessors, (201), 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 71 [2022-07-11 22:22:07,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:22:07,972 INFO L225 Difference]: With dead ends: 355 [2022-07-11 22:22:07,972 INFO L226 Difference]: Without dead ends: 180 [2022-07-11 22:22:07,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2022-07-11 22:22:07,973 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 350 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:22:07,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 166 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:22:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-11 22:22:07,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 157. [2022-07-11 22:22:07,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1346153846153846) internal successors, (177), 156 states have internal predecessors, (177), 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) [2022-07-11 22:22:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 177 transitions. [2022-07-11 22:22:07,983 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 177 transitions. Word has length 71 [2022-07-11 22:22:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:22:07,983 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 177 transitions. [2022-07-11 22:22:07,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.911764705882353) internal successors, (201), 34 states have internal predecessors, (201), 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) [2022-07-11 22:22:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 177 transitions. [2022-07-11 22:22:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-11 22:22:07,984 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:22:07,984 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:22:08,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 22:22:08,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:22:08,200 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:22:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:22:08,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1263359473, now seen corresponding path program 1 times [2022-07-11 22:22:08,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:22:08,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997505673] [2022-07-11 22:22:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:22:08,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:22:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:22:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-11 22:22:08,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:22:08,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997505673] [2022-07-11 22:22:08,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997505673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:22:08,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:22:08,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:22:08,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573178792] [2022-07-11 22:22:08,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:22:08,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:22:08,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:22:08,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:22:08,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:22:08,247 INFO L87 Difference]: Start difference. First operand 157 states and 177 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2022-07-11 22:22:08,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:22:08,259 INFO L93 Difference]: Finished difference Result 212 states and 240 transitions. [2022-07-11 22:22:08,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:22:08,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 83 [2022-07-11 22:22:08,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:22:08,260 INFO L225 Difference]: With dead ends: 212 [2022-07-11 22:22:08,260 INFO L226 Difference]: Without dead ends: 97 [2022-07-11 22:22:08,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:22:08,261 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:22:08,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 40 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:22:08,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-11 22:22:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2022-07-11 22:22:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.098901098901099) internal successors, (100), 91 states have internal predecessors, (100), 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) [2022-07-11 22:22:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-07-11 22:22:08,270 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 83 [2022-07-11 22:22:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:22:08,271 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-07-11 22:22:08,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2022-07-11 22:22:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-07-11 22:22:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 22:22:08,273 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:22:08,273 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:22:08,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-11 22:22:08,274 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:22:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:22:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2130271302, now seen corresponding path program 5 times [2022-07-11 22:22:08,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:22:08,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920006877] [2022-07-11 22:22:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:22:08,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:22:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:22:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 34 proven. 55 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-11 22:22:08,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:22:08,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920006877] [2022-07-11 22:22:08,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920006877] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:22:08,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175168953] [2022-07-11 22:22:08,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:22:08,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:22:08,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:22:08,470 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) [2022-07-11 22:22:08,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 22:22:55,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-11 22:22:55,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:22:56,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-11 22:22:56,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:22:56,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:22:56,292 INFO L356 Elim1Store]: treesize reduction 534, result has 8.4 percent of original size [2022-07-11 22:22:56,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 64 [2022-07-11 22:22:56,332 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:22:56,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:22:56,382 INFO L356 Elim1Store]: treesize reduction 336, result has 9.9 percent of original size [2022-07-11 22:22:56,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 49 [2022-07-11 22:22:56,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2022-07-11 22:22:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:22:56,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:22:56,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 23 [2022-07-11 22:22:56,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2022-07-11 22:22:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-11 22:22:57,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175168953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:22:57,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:22:57,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 19] total 43 [2022-07-11 22:22:57,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276381734] [2022-07-11 22:22:57,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:22:57,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-11 22:22:57,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:22:57,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-11 22:22:57,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1433, Unknown=0, NotChecked=0, Total=1806 [2022-07-11 22:22:57,102 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 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) [2022-07-11 22:22:57,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:22:57,961 INFO L93 Difference]: Finished difference Result 135 states and 148 transitions. [2022-07-11 22:22:57,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-11 22:22:57,961 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 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 91 [2022-07-11 22:22:57,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:22:57,962 INFO L225 Difference]: With dead ends: 135 [2022-07-11 22:22:57,962 INFO L226 Difference]: Without dead ends: 125 [2022-07-11 22:22:57,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 155 SyntacticMatches, 14 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=678, Invalid=2514, Unknown=0, NotChecked=0, Total=3192 [2022-07-11 22:22:57,963 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 349 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:22:57,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 348 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 972 Invalid, 0 Unknown, 161 Unchecked, 0.4s Time] [2022-07-11 22:22:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-11 22:22:57,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 92. [2022-07-11 22:22:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 91 states have internal predecessors, (99), 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) [2022-07-11 22:22:57,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2022-07-11 22:22:57,970 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 91 [2022-07-11 22:22:57,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:22:57,970 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2022-07-11 22:22:57,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 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) [2022-07-11 22:22:57,970 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2022-07-11 22:22:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 22:22:57,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:22:57,970 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:22:57,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-11 22:22:58,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:22:58,171 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:22:58,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:22:58,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1771668984, now seen corresponding path program 6 times [2022-07-11 22:22:58,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:22:58,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754443218] [2022-07-11 22:22:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:22:58,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:22:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:22:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 96 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 22:22:58,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:22:58,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754443218] [2022-07-11 22:22:58,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754443218] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:22:58,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336787724] [2022-07-11 22:22:58,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:22:58,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:22:58,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:22:58,612 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) [2022-07-11 22:22:58,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 22:23:00,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-11 22:23:00,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:00,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-11 22:23:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:00,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:00,227 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-11 22:23:00,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-11 22:23:00,285 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:23:00,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:23:00,341 INFO L356 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2022-07-11 22:23:00,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 61 [2022-07-11 22:23:00,375 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:00,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:23:00,409 INFO L356 Elim1Store]: treesize reduction 181, result has 13.4 percent of original size [2022-07-11 22:23:00,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 43 [2022-07-11 22:23:00,440 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:23:00,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:23:00,483 INFO L356 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2022-07-11 22:23:00,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 61 [2022-07-11 22:23:00,518 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:00,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:23:00,550 INFO L356 Elim1Store]: treesize reduction 253, result has 10.0 percent of original size [2022-07-11 22:23:00,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 62 treesize of output 40 [2022-07-11 22:23:00,596 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:23:00,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:23:00,639 INFO L356 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2022-07-11 22:23:00,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 61 [2022-07-11 22:23:00,683 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:23:00,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:23:00,747 INFO L356 Elim1Store]: treesize reduction 479, result has 11.5 percent of original size [2022-07-11 22:23:00,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 80 [2022-07-11 22:23:00,833 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:23:00,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:23:00,883 INFO L356 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2022-07-11 22:23:00,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 61 [2022-07-11 22:23:00,916 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:23:00,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:23:00,949 INFO L356 Elim1Store]: treesize reduction 181, result has 13.4 percent of original size [2022-07-11 22:23:00,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 43 [2022-07-11 22:23:01,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2022-07-11 22:23:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:23:01,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:30,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 47 [2022-07-11 22:23:30,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13864 treesize of output 13800 [2022-07-11 22:23:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 22:23:35,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336787724] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:35,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:35,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 22] total 52 [2022-07-11 22:23:35,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18504328] [2022-07-11 22:23:35,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:35,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-11 22:23:35,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:35,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-11 22:23:35,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=2293, Unknown=11, NotChecked=0, Total=2652 [2022-07-11 22:23:35,501 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 52 states, 52 states have (on average 4.923076923076923) internal successors, (256), 52 states have internal predecessors, (256), 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) [2022-07-11 22:23:49,351 WARN L233 SmtUtils]: Spent 9.43s on a formula simplification. DAG size of input: 82 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 22:24:41,162 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (or (let ((.cse0 (div c_~CELLCOUNT~0 5))) (let ((.cse1 (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) .cse0))) (and (<= |c_ULTIMATE.start_main_~i~0#1| .cse0) (or .cse1 (< c_~CELLCOUNT~0 0)) (or .cse1 (not (= (mod c_~CELLCOUNT~0 5) 0)))))) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select .cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)))) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select .cse2 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20))) (forall ((|v_ULTIMATE.start_main_~i~0#1_184| Int) (v_ArrVal_933 Int) (v_ArrVal_932 Int) (v_ArrVal_931 Int) (v_ArrVal_930 Int)) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select (let ((.cse3 (* 20 |v_ULTIMATE.start_main_~i~0#1_184|))) (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (- 20) .cse3 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_933) (+ (- 16) .cse3 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_932) (+ .cse3 (- 12) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_931) (+ (- 4) .cse3 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_930)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20))) (not (<= |v_ULTIMATE.start_main_~i~0#1_184| 1)) (<= (+ 2 |v_ULTIMATE.start_main_~i~0#1_184|) (div c_~CELLCOUNT~0 5)))))) is different from false [2022-07-11 22:24:45,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:24:45,383 INFO L93 Difference]: Finished difference Result 320 states and 347 transitions. [2022-07-11 22:24:45,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-11 22:24:45,384 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.923076923076923) internal successors, (256), 52 states have internal predecessors, (256), 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 91 [2022-07-11 22:24:45,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:24:45,385 INFO L225 Difference]: With dead ends: 320 [2022-07-11 22:24:45,385 INFO L226 Difference]: Without dead ends: 310 [2022-07-11 22:24:45,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 164 SyntacticMatches, 56 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4003 ImplicationChecksByTransitivity, 98.6s TimeCoverageRelationStatistics Valid=1328, Invalid=8518, Unknown=58, NotChecked=196, Total=10100 [2022-07-11 22:24:45,387 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 687 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 2422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 677 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 22:24:45,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 546 Invalid, 2422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 1362 Invalid, 0 Unknown, 677 Unchecked, 0.7s Time] [2022-07-11 22:24:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-07-11 22:24:45,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 173. [2022-07-11 22:24:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0872093023255813) internal successors, (187), 172 states have internal predecessors, (187), 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) [2022-07-11 22:24:45,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 187 transitions. [2022-07-11 22:24:45,401 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 187 transitions. Word has length 91 [2022-07-11 22:24:45,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:24:45,402 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 187 transitions. [2022-07-11 22:24:45,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.923076923076923) internal successors, (256), 52 states have internal predecessors, (256), 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) [2022-07-11 22:24:45,402 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 187 transitions. [2022-07-11 22:24:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-11 22:24:45,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:24:45,403 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:24:45,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 22:24:45,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:24:45,609 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:24:45,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:24:45,609 INFO L85 PathProgramCache]: Analyzing trace with hash 463915083, now seen corresponding path program 7 times [2022-07-11 22:24:45,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:24:45,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024895988] [2022-07-11 22:24:45,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:24:45,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:24:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 131 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 22:24:46,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:24:46,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024895988] [2022-07-11 22:24:46,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024895988] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:24:46,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871194894] [2022-07-11 22:24:46,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:24:46,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:24:46,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:24:46,527 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) [2022-07-11 22:24:46,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 22:24:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:46,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-11 22:24:46,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:24:46,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:24:46,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 49 [2022-07-11 22:24:46,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:24:46,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 61 [2022-07-11 22:24:46,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:24:46,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2022-07-11 22:24:46,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:24:46,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:46,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 61 [2022-07-11 22:24:47,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:24:47,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2022-07-11 22:24:47,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:24:47,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 61 [2022-07-11 22:24:47,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:24:47,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:47,155 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 22:24:47,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 52 [2022-07-11 22:24:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 126 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 22:24:47,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:24:49,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-07-11 22:24:49,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-07-11 22:24:49,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 15 [2022-07-11 22:24:49,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:24:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 22:24:49,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871194894] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:24:49,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:24:49,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 22] total 58 [2022-07-11 22:24:49,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578992527] [2022-07-11 22:24:49,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:24:49,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-11 22:24:49,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:24:49,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-11 22:24:49,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2022-07-11 22:24:49,321 INFO L87 Difference]: Start difference. First operand 173 states and 187 transitions. Second operand has 58 states, 58 states have (on average 4.706896551724138) internal successors, (273), 58 states have internal predecessors, (273), 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) [2022-07-11 22:25:02,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:02,326 INFO L93 Difference]: Finished difference Result 865 states and 958 transitions. [2022-07-11 22:25:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-07-11 22:25:02,326 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.706896551724138) internal successors, (273), 58 states have internal predecessors, (273), 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 97 [2022-07-11 22:25:02,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:02,329 INFO L225 Difference]: With dead ends: 865 [2022-07-11 22:25:02,329 INFO L226 Difference]: Without dead ends: 855 [2022-07-11 22:25:02,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 242 SyntacticMatches, 19 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23200 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=6073, Invalid=54197, Unknown=0, NotChecked=0, Total=60270 [2022-07-11 22:25:02,335 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1665 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 4505 mSolverCounterSat, 1391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 7011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1391 IncrementalHoareTripleChecker+Valid, 4505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1115 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:02,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1665 Valid, 777 Invalid, 7011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1391 Valid, 4505 Invalid, 0 Unknown, 1115 Unchecked, 2.6s Time] [2022-07-11 22:25:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-07-11 22:25:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 410. [2022-07-11 22:25:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.097799511002445) internal successors, (449), 409 states have internal predecessors, (449), 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) [2022-07-11 22:25:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 449 transitions. [2022-07-11 22:25:02,374 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 449 transitions. Word has length 97 [2022-07-11 22:25:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:02,374 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 449 transitions. [2022-07-11 22:25:02,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.706896551724138) internal successors, (273), 58 states have internal predecessors, (273), 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) [2022-07-11 22:25:02,374 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 449 transitions. [2022-07-11 22:25:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-11 22:25:02,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:02,375 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:02,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 22:25:02,582 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,SelfDestructingSolverStorable12 [2022-07-11 22:25:02,582 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:02,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2086528494, now seen corresponding path program 8 times [2022-07-11 22:25:02,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:02,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565188888] [2022-07-11 22:25:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:02,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-11 22:25:02,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:02,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565188888] [2022-07-11 22:25:02,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565188888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:02,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482724368] [2022-07-11 22:25:02,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:25:02,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:02,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:02,731 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) [2022-07-11 22:25:02,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 22:25:02,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:25:02,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:25:02,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 22:25:02,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:25:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-11 22:25:02,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:25:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-11 22:25:03,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482724368] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:25:03,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:25:03,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-07-11 22:25:03,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168330764] [2022-07-11 22:25:03,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:25:03,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 22:25:03,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:25:03,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 22:25:03,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-07-11 22:25:03,129 INFO L87 Difference]: Start difference. First operand 410 states and 449 transitions. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 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) [2022-07-11 22:25:03,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:03,452 INFO L93 Difference]: Finished difference Result 620 states and 676 transitions. [2022-07-11 22:25:03,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 22:25:03,453 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 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 99 [2022-07-11 22:25:03,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:03,454 INFO L225 Difference]: With dead ends: 620 [2022-07-11 22:25:03,454 INFO L226 Difference]: Without dead ends: 415 [2022-07-11 22:25:03,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-07-11 22:25:03,455 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 319 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:03,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 64 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:25:03,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-07-11 22:25:03,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 337. [2022-07-11 22:25:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.0744047619047619) internal successors, (361), 336 states have internal predecessors, (361), 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) [2022-07-11 22:25:03,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 361 transitions. [2022-07-11 22:25:03,485 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 361 transitions. Word has length 99 [2022-07-11 22:25:03,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:03,486 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 361 transitions. [2022-07-11 22:25:03,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 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) [2022-07-11 22:25:03,486 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 361 transitions. [2022-07-11 22:25:03,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-11 22:25:03,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:03,487 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:03,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 22:25:03,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-11 22:25:03,703 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:03,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:03,704 INFO L85 PathProgramCache]: Analyzing trace with hash -773865378, now seen corresponding path program 9 times [2022-07-11 22:25:03,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:03,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51626521] [2022-07-11 22:25:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:03,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 14 proven. 169 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 22:25:04,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:04,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51626521] [2022-07-11 22:25:04,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51626521] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:04,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160217441] [2022-07-11 22:25:04,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:25:04,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:04,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:04,567 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) [2022-07-11 22:25:04,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 22:25:05,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-11 22:25:05,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:25:05,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-11 22:25:05,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:25:06,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:25:06,240 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-11 22:25:06,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-11 22:25:06,335 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:25:06,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:25:06,380 INFO L356 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2022-07-11 22:25:06,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 61 [2022-07-11 22:25:06,418 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:25:06,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:25:06,450 INFO L356 Elim1Store]: treesize reduction 295, result has 11.1 percent of original size [2022-07-11 22:25:06,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 55 [2022-07-11 22:25:06,483 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:25:06,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:25:06,526 INFO L356 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2022-07-11 22:25:06,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 61 [2022-07-11 22:25:06,572 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:25:06,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:25:06,657 INFO L356 Elim1Store]: treesize reduction 714, result has 6.4 percent of original size [2022-07-11 22:25:06,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 101 treesize of output 67 [2022-07-11 22:25:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 14 proven. 164 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 22:25:07,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:25:08,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-07-11 22:25:08,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-07-11 22:25:08,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 15 [2022-07-11 22:25:08,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:25:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 1 proven. 177 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 22:25:09,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160217441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:25:09,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:25:09,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 29] total 72 [2022-07-11 22:25:09,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837182295] [2022-07-11 22:25:09,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:25:09,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-11 22:25:09,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:25:09,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-11 22:25:09,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=4652, Unknown=0, NotChecked=0, Total=5112 [2022-07-11 22:25:09,294 INFO L87 Difference]: Start difference. First operand 337 states and 361 transitions. Second operand has 72 states, 72 states have (on average 4.069444444444445) internal successors, (293), 72 states have internal predecessors, (293), 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) [2022-07-11 22:25:16,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:16,327 INFO L93 Difference]: Finished difference Result 595 states and 641 transitions. [2022-07-11 22:25:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-11 22:25:16,328 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 4.069444444444445) internal successors, (293), 72 states have internal predecessors, (293), 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 103 [2022-07-11 22:25:16,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:16,329 INFO L225 Difference]: With dead ends: 595 [2022-07-11 22:25:16,329 INFO L226 Difference]: Without dead ends: 571 [2022-07-11 22:25:16,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 190 SyntacticMatches, 29 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8880 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3420, Invalid=22986, Unknown=0, NotChecked=0, Total=26406 [2022-07-11 22:25:16,331 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1356 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:16,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 666 Invalid, 2924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 2197 Invalid, 0 Unknown, 204 Unchecked, 1.1s Time] [2022-07-11 22:25:16,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-07-11 22:25:16,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 386. [2022-07-11 22:25:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.0675324675324676) internal successors, (411), 385 states have internal predecessors, (411), 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) [2022-07-11 22:25:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 411 transitions. [2022-07-11 22:25:16,381 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 411 transitions. Word has length 103 [2022-07-11 22:25:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:16,381 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 411 transitions. [2022-07-11 22:25:16,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 4.069444444444445) internal successors, (293), 72 states have internal predecessors, (293), 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) [2022-07-11 22:25:16,382 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 411 transitions. [2022-07-11 22:25:16,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-11 22:25:16,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:16,383 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:16,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 22:25:16,590 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,SelfDestructingSolverStorable14 [2022-07-11 22:25:16,590 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:16,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:16,590 INFO L85 PathProgramCache]: Analyzing trace with hash -729472540, now seen corresponding path program 10 times [2022-07-11 22:25:16,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:16,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157297643] [2022-07-11 22:25:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:16,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-07-11 22:25:16,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:16,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157297643] [2022-07-11 22:25:16,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157297643] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:16,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450185965] [2022-07-11 22:25:16,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:25:16,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:16,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:16,774 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) [2022-07-11 22:25:16,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 22:25:16,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:25:16,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:25:16,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 22:25:16,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:25:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-07-11 22:25:17,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:25:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-07-11 22:25:17,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450185965] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:25:17,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:25:17,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2022-07-11 22:25:17,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044358580] [2022-07-11 22:25:17,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:25:17,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-11 22:25:17,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:25:17,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-11 22:25:17,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-07-11 22:25:17,177 INFO L87 Difference]: Start difference. First operand 386 states and 411 transitions. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 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) [2022-07-11 22:25:17,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:17,680 INFO L93 Difference]: Finished difference Result 538 states and 571 transitions. [2022-07-11 22:25:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-11 22:25:17,681 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 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 107 [2022-07-11 22:25:17,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:17,682 INFO L225 Difference]: With dead ends: 538 [2022-07-11 22:25:17,682 INFO L226 Difference]: Without dead ends: 265 [2022-07-11 22:25:17,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 210 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2022-07-11 22:25:17,684 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 281 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:17,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 110 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 22:25:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-11 22:25:17,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 211. [2022-07-11 22:25:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.061904761904762) internal successors, (223), 210 states have internal predecessors, (223), 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) [2022-07-11 22:25:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 223 transitions. [2022-07-11 22:25:17,708 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 223 transitions. Word has length 107 [2022-07-11 22:25:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:17,709 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 223 transitions. [2022-07-11 22:25:17,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 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) [2022-07-11 22:25:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 223 transitions. [2022-07-11 22:25:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-11 22:25:17,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:17,710 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:17,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-11 22:25:17,926 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,SelfDestructingSolverStorable15 [2022-07-11 22:25:17,927 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:17,927 INFO L85 PathProgramCache]: Analyzing trace with hash -191553999, now seen corresponding path program 11 times [2022-07-11 22:25:17,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:17,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551957934] [2022-07-11 22:25:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:17,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 16 proven. 202 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 22:25:18,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:18,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551957934] [2022-07-11 22:25:18,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551957934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:18,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261337503] [2022-07-11 22:25:18,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:25:18,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:18,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:18,551 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) [2022-07-11 22:25:18,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 22:26:04,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-11 22:26:04,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:26:04,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-11 22:26:04,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:04,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:26:04,407 INFO L356 Elim1Store]: treesize reduction 336, result has 9.9 percent of original size [2022-07-11 22:26:04,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 49 [2022-07-11 22:26:04,466 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:26:04,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:26:04,524 INFO L356 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2022-07-11 22:26:04,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 61 [2022-07-11 22:26:04,563 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:04,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:26:04,591 INFO L356 Elim1Store]: treesize reduction 181, result has 13.4 percent of original size [2022-07-11 22:26:04,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 43 [2022-07-11 22:26:04,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2022-07-11 22:26:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 16 proven. 206 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-11 22:26:04,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:07,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 15 [2022-07-11 22:26:07,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:26:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 16 proven. 194 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 22:26:07,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261337503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:26:07,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:26:07,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 17] total 55 [2022-07-11 22:26:07,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183451581] [2022-07-11 22:26:07,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:07,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-11 22:26:07,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:07,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-11 22:26:07,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2751, Unknown=0, NotChecked=0, Total=2970 [2022-07-11 22:26:07,705 INFO L87 Difference]: Start difference. First operand 211 states and 223 transitions. Second operand has 55 states, 55 states have (on average 5.2727272727272725) internal successors, (290), 55 states have internal predecessors, (290), 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) [2022-07-11 22:26:12,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:12,833 INFO L93 Difference]: Finished difference Result 381 states and 416 transitions. [2022-07-11 22:26:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-11 22:26:12,833 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 5.2727272727272725) internal successors, (290), 55 states have internal predecessors, (290), 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 109 [2022-07-11 22:26:12,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:12,835 INFO L225 Difference]: With dead ends: 381 [2022-07-11 22:26:12,835 INFO L226 Difference]: Without dead ends: 365 [2022-07-11 22:26:12,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 209 SyntacticMatches, 5 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5305 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1614, Invalid=16746, Unknown=0, NotChecked=0, Total=18360 [2022-07-11 22:26:12,836 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 1537 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 4773 mSolverCounterSat, 769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 6123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 4773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 581 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:12,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1537 Valid, 1037 Invalid, 6123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 4773 Invalid, 0 Unknown, 581 Unchecked, 2.1s Time] [2022-07-11 22:26:12,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-07-11 22:26:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 239. [2022-07-11 22:26:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0714285714285714) internal successors, (255), 238 states have internal predecessors, (255), 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) [2022-07-11 22:26:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 255 transitions. [2022-07-11 22:26:12,860 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 255 transitions. Word has length 109 [2022-07-11 22:26:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:12,861 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 255 transitions. [2022-07-11 22:26:12,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 5.2727272727272725) internal successors, (290), 55 states have internal predecessors, (290), 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) [2022-07-11 22:26:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 255 transitions. [2022-07-11 22:26:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-11 22:26:12,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:12,862 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:12,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:13,071 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,SelfDestructingSolverStorable16 [2022-07-11 22:26:13,072 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:13,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:13,072 INFO L85 PathProgramCache]: Analyzing trace with hash 114210653, now seen corresponding path program 12 times [2022-07-11 22:26:13,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:13,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424856961] [2022-07-11 22:26:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:13,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:14,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:14,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424856961] [2022-07-11 22:26:14,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424856961] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:14,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390010204] [2022-07-11 22:26:14,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:26:14,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:14,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:14,488 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) [2022-07-11 22:26:14,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 22:26:18,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-11 22:26:18,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:26:18,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 125 conjunts are in the unsatisfiable core [2022-07-11 22:26:18,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:18,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:26:18,419 INFO L356 Elim1Store]: treesize reduction 534, result has 8.4 percent of original size [2022-07-11 22:26:18,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 64 [2022-07-11 22:26:18,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:26:18,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 64 [2022-07-11 22:26:18,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:26:18,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:18,705 INFO L356 Elim1Store]: treesize reduction 32, result has 40.7 percent of original size [2022-07-11 22:26:18,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 74 [2022-07-11 22:26:18,805 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:18,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2022-07-11 22:26:18,877 INFO L356 Elim1Store]: treesize reduction 528, result has 12.1 percent of original size [2022-07-11 22:26:18,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 110 [2022-07-11 22:26:19,039 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:19,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2022-07-11 22:26:19,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,076 INFO L356 Elim1Store]: treesize reduction 230, result has 8.7 percent of original size [2022-07-11 22:26:19,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 93 [2022-07-11 22:26:19,302 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:19,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2022-07-11 22:26:19,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,342 INFO L356 Elim1Store]: treesize reduction 230, result has 8.7 percent of original size [2022-07-11 22:26:19,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 93 [2022-07-11 22:26:19,399 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:19,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2022-07-11 22:26:19,474 INFO L356 Elim1Store]: treesize reduction 528, result has 12.1 percent of original size [2022-07-11 22:26:19,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 110 [2022-07-11 22:26:19,595 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:19,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2022-07-11 22:26:19,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,633 INFO L356 Elim1Store]: treesize reduction 230, result has 8.7 percent of original size [2022-07-11 22:26:19,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 93 [2022-07-11 22:26:19,765 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:19,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2022-07-11 22:26:19,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:19,798 INFO L356 Elim1Store]: treesize reduction 188, result has 8.7 percent of original size [2022-07-11 22:26:19,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 75 [2022-07-11 22:26:19,841 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:19,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2022-07-11 22:26:19,907 INFO L356 Elim1Store]: treesize reduction 528, result has 12.1 percent of original size [2022-07-11 22:26:19,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 110 [2022-07-11 22:26:20,020 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:20,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2022-07-11 22:26:20,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,057 INFO L356 Elim1Store]: treesize reduction 230, result has 8.7 percent of original size [2022-07-11 22:26:20,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 93 [2022-07-11 22:26:20,162 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:20,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2022-07-11 22:26:20,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,200 INFO L356 Elim1Store]: treesize reduction 230, result has 8.7 percent of original size [2022-07-11 22:26:20,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 93 [2022-07-11 22:26:20,290 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:20,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2022-07-11 22:26:20,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,382 INFO L356 Elim1Store]: treesize reduction 276, result has 4.2 percent of original size [2022-07-11 22:26:20,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 98 [2022-07-11 22:26:20,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,522 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 22:26:20,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-07-11 22:26:20,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,569 INFO L356 Elim1Store]: treesize reduction 32, result has 40.7 percent of original size [2022-07-11 22:26:20,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 86 [2022-07-11 22:26:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 16 proven. 131 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-11 22:26:21,471 INFO L328 TraceCheckSpWp]: Computing backward predicates...