./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_compare_ground.i --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-examples/standard_compare_ground.i -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 d4cee1ffe184d6f720684150b88947bfbeafd0a7d6fa25fd546666420e94872c --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 21:42:49,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 21:42:49,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 21:42:49,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 21:42:49,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 21:42:49,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 21:42:49,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 21:42:49,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 21:42:49,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 21:42:49,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 21:42:49,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 21:42:49,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 21:42:49,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 21:42:49,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 21:42:49,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 21:42:49,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 21:42:49,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 21:42:49,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 21:42:49,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 21:42:49,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 21:42:49,430 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 21:42:49,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 21:42:49,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 21:42:49,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 21:42:49,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 21:42:49,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 21:42:49,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 21:42:49,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 21:42:49,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 21:42:49,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 21:42:49,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 21:42:49,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 21:42:49,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 21:42:49,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 21:42:49,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 21:42:49,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 21:42:49,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 21:42:49,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 21:42:49,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 21:42:49,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 21:42:49,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 21:42:49,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 21:42:49,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 21:42:49,472 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 21:42:49,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 21:42:49,474 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 21:42:49,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 21:42:49,475 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 21:42:49,475 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 21:42:49,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 21:42:49,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 21:42:49,476 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 21:42:49,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 21:42:49,477 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 21:42:49,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 21:42:49,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 21:42:49,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 21:42:49,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 21:42:49,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 21:42:49,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 21:42:49,478 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 21:42:49,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 21:42:49,479 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 21:42:49,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 21:42:49,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 21:42:49,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 21:42:49,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 21:42:49,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 21:42:49,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 21:42:49,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 21:42:49,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 21:42:49,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 21:42:49,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 21:42:49,482 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 21:42:49,482 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 21:42:49,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 21:42:49,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4cee1ffe184d6f720684150b88947bfbeafd0a7d6fa25fd546666420e94872c [2022-07-11 21:42:49,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 21:42:49,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 21:42:49,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 21:42:49,718 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 21:42:49,719 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 21:42:49,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_compare_ground.i [2022-07-11 21:42:49,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e928bc7da/f6ba7783ee684b41bc62faf59a3f8168/FLAGbba0452ea [2022-07-11 21:42:50,183 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 21:42:50,183 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compare_ground.i [2022-07-11 21:42:50,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e928bc7da/f6ba7783ee684b41bc62faf59a3f8168/FLAGbba0452ea [2022-07-11 21:42:50,206 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e928bc7da/f6ba7783ee684b41bc62faf59a3f8168 [2022-07-11 21:42:50,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 21:42:50,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 21:42:50,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 21:42:50,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 21:42:50,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 21:42:50,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 09:42:50" (1/1) ... [2022-07-11 21:42:50,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@127dacee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:42:50, skipping insertion in model container [2022-07-11 21:42:50,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 09:42:50" (1/1) ... [2022-07-11 21:42:50,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 21:42:50,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 21:42:50,404 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-examples/standard_compare_ground.i[816,829] [2022-07-11 21:42:50,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 21:42:50,428 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 21:42:50,440 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-examples/standard_compare_ground.i[816,829] [2022-07-11 21:42:50,454 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 21:42:50,467 INFO L208 MainTranslator]: Completed translation [2022-07-11 21:42:50,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:42:50 WrapperNode [2022-07-11 21:42:50,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 21:42:50,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 21:42:50,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 21:42:50,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 21:42:50,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:42:50" (1/1) ... [2022-07-11 21:42:50,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:42:50" (1/1) ... [2022-07-11 21:42:50,500 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-07-11 21:42:50,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 21:42:50,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 21:42:50,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 21:42:50,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 21:42:50,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:42:50" (1/1) ... [2022-07-11 21:42:50,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:42:50" (1/1) ... [2022-07-11 21:42:50,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:42:50" (1/1) ... [2022-07-11 21:42:50,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:42:50" (1/1) ... [2022-07-11 21:42:50,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:42:50" (1/1) ... [2022-07-11 21:42:50,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:42:50" (1/1) ... [2022-07-11 21:42:50,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:42:50" (1/1) ... [2022-07-11 21:42:50,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 21:42:50,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 21:42:50,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 21:42:50,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 21:42:50,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:42:50" (1/1) ... [2022-07-11 21:42:50,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 21:42:50,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:42:50,572 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 21:42:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 21:42:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 21:42:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 21:42:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 21:42:50,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 21:42:50,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 21:42:50,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 21:42:50,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 21:42:50,603 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 21:42:50,685 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 21:42:50,686 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 21:42:50,782 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 21:42:50,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 21:42:50,787 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-11 21:42:50,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 09:42:50 BoogieIcfgContainer [2022-07-11 21:42:50,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 21:42:50,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 21:42:50,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 21:42:50,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 21:42:50,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 09:42:50" (1/3) ... [2022-07-11 21:42:50,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1590acce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 09:42:50, skipping insertion in model container [2022-07-11 21:42:50,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:42:50" (2/3) ... [2022-07-11 21:42:50,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1590acce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 09:42:50, skipping insertion in model container [2022-07-11 21:42:50,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 09:42:50" (3/3) ... [2022-07-11 21:42:50,796 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2022-07-11 21:42:50,808 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 21:42:50,808 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 21:42:50,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 21:42:50,855 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@6e9751b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f0c15f9 [2022-07-11 21:42:50,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 21:42:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:42:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-11 21:42:50,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:42:50,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:42:50,871 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:42:50,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:42:50,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2005121311, now seen corresponding path program 1 times [2022-07-11 21:42:50,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:42:50,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382442209] [2022-07-11 21:42:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:42:50,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:42:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:42:51,081 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 21:42:51,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:42:51,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382442209] [2022-07-11 21:42:51,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382442209] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 21:42:51,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 21:42:51,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 21:42:51,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807651812] [2022-07-11 21:42:51,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 21:42:51,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 21:42:51,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:42:51,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 21:42:51,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 21:42:51,142 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 21:42:51,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:42:51,179 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2022-07-11 21:42:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 21:42:51,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-07-11 21:42:51,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:42:51,194 INFO L225 Difference]: With dead ends: 36 [2022-07-11 21:42:51,195 INFO L226 Difference]: Without dead ends: 17 [2022-07-11 21:42:51,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 21:42:51,200 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:42:51,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:42:51,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-11 21:42:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-07-11 21:42:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 21:42:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-07-11 21:42:51,227 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-07-11 21:42:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:42:51,228 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-07-11 21:42:51,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 21:42:51,228 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-07-11 21:42:51,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-11 21:42:51,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:42:51,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:42:51,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 21:42:51,230 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:42:51,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:42:51,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1565815188, now seen corresponding path program 1 times [2022-07-11 21:42:51,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:42:51,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100795646] [2022-07-11 21:42:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:42:51,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:42:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:42:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 21:42:51,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:42:51,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100795646] [2022-07-11 21:42:51,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100795646] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:42:51,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80843414] [2022-07-11 21:42:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:42:51,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:42:51,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:42:51,306 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 21:42:51,308 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 21:42:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:42:51,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 21:42:51,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:42:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 21:42:51,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 21:42:51,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80843414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 21:42:51,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 21:42:51,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-11 21:42:51,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469939212] [2022-07-11 21:42:51,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 21:42:51,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 21:42:51,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:42:51,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 21:42:51,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 21:42:51,421 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:42:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:42:51,448 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-07-11 21:42:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 21:42:51,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-11 21:42:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:42:51,451 INFO L225 Difference]: With dead ends: 26 [2022-07-11 21:42:51,454 INFO L226 Difference]: Without dead ends: 19 [2022-07-11 21:42:51,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 21:42:51,456 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:42:51,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:42:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-11 21:42:51,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-07-11 21:42:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:42:51,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-11 21:42:51,466 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-07-11 21:42:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:42:51,471 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-11 21:42:51,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:42:51,472 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-11 21:42:51,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-11 21:42:51,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:42:51,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:42:51,496 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 21:42:51,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:42:51,688 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:42:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:42:51,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1959146159, now seen corresponding path program 1 times [2022-07-11 21:42:51,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:42:51,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103653761] [2022-07-11 21:42:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:42:51,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:42:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:42:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 21:42:51,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:42:51,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103653761] [2022-07-11 21:42:51,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103653761] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:42:51,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463399790] [2022-07-11 21:42:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:42:51,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:42:51,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:42:51,748 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 21:42:51,752 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 21:42:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:42:51,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 21:42:51,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:42:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 21:42:51,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 21:42:51,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463399790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 21:42:51,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 21:42:51,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-11 21:42:51,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329416450] [2022-07-11 21:42:51,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 21:42:51,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 21:42:51,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:42:51,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 21:42:51,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 21:42:51,841 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 21:42:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:42:51,849 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-07-11 21:42:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 21:42:51,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2022-07-11 21:42:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:42:51,850 INFO L225 Difference]: With dead ends: 27 [2022-07-11 21:42:51,850 INFO L226 Difference]: Without dead ends: 17 [2022-07-11 21:42:51,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 21:42:51,852 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:42:51,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:42:51,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-11 21:42:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-11 21:42:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 21:42:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-11 21:42:51,855 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-07-11 21:42:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:42:51,856 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-11 21:42:51,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 21:42:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-11 21:42:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-11 21:42:51,857 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:42:51,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:42:51,894 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 21:42:52,080 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,SelfDestructingSolverStorable2 [2022-07-11 21:42:52,081 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:42:52,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:42:52,081 INFO L85 PathProgramCache]: Analyzing trace with hash -184138797, now seen corresponding path program 1 times [2022-07-11 21:42:52,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:42:52,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814723282] [2022-07-11 21:42:52,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:42:52,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:42:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:42:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 21:42:52,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:42:52,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814723282] [2022-07-11 21:42:52,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814723282] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:42:52,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499877982] [2022-07-11 21:42:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:42:52,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:42:52,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:42:52,121 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 21:42:52,135 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 21:42:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:42:52,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 21:42:52,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:42:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 21:42:52,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:42:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 21:42:52,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499877982] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:42:52,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:42:52,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-11 21:42:52,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238163032] [2022-07-11 21:42:52,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:42:52,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 21:42:52,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:42:52,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 21:42:52,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 21:42:52,234 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 21:42:52,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:42:52,253 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-07-11 21:42:52,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 21:42:52,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 14 [2022-07-11 21:42:52,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:42:52,255 INFO L225 Difference]: With dead ends: 35 [2022-07-11 21:42:52,255 INFO L226 Difference]: Without dead ends: 23 [2022-07-11 21:42:52,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 21:42:52,256 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:42:52,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 41 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:42:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-11 21:42:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-11 21:42:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:42:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-07-11 21:42:52,260 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2022-07-11 21:42:52,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:42:52,260 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-07-11 21:42:52,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 21:42:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-07-11 21:42:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-11 21:42:52,261 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:42:52,262 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:42:52,283 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 21:42:52,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:42:52,476 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:42:52,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:42:52,476 INFO L85 PathProgramCache]: Analyzing trace with hash -494561575, now seen corresponding path program 2 times [2022-07-11 21:42:52,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:42:52,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593601117] [2022-07-11 21:42:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:42:52,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:42:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:42:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 21:42:52,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:42:52,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593601117] [2022-07-11 21:42:52,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593601117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:42:52,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259294348] [2022-07-11 21:42:52,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 21:42:52,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:42:52,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:42:52,539 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 21:42:52,543 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 21:42:52,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 21:42:52,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:42:52,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 21:42:52,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:42:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 21:42:52,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:42:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 21:42:52,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259294348] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:42:52,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:42:52,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-11 21:42:52,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130238466] [2022-07-11 21:42:52,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:42:52,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 21:42:52,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:42:52,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 21:42:52,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-11 21:42:52,709 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:42:52,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:42:52,754 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-07-11 21:42:52,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 21:42:52,755 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-11 21:42:52,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:42:52,756 INFO L225 Difference]: With dead ends: 52 [2022-07-11 21:42:52,756 INFO L226 Difference]: Without dead ends: 40 [2022-07-11 21:42:52,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-11 21:42:52,757 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:42:52,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 44 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:42:52,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-11 21:42:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-07-11 21:42:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:42:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-07-11 21:42:52,763 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 20 [2022-07-11 21:42:52,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:42:52,763 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-07-11 21:42:52,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:42:52,764 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-07-11 21:42:52,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-11 21:42:52,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:42:52,765 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:42:52,788 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 21:42:52,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:42:52,976 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:42:52,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:42:52,976 INFO L85 PathProgramCache]: Analyzing trace with hash 451448930, now seen corresponding path program 3 times [2022-07-11 21:42:52,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:42:52,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143266386] [2022-07-11 21:42:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:42:52,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:42:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:42:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 21:42:53,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:42:53,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143266386] [2022-07-11 21:42:53,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143266386] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:42:53,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557846361] [2022-07-11 21:42:53,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 21:42:53,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:42:53,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:42:53,207 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 21:42:53,217 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 21:42:53,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 21:42:53,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:42:53,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 21:42:53,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:42:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-11 21:42:53,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:42:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-11 21:42:53,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557846361] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:42:53,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:42:53,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-11 21:42:53,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056023397] [2022-07-11 21:42:53,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:42:53,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-11 21:42:53,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:42:53,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-11 21:42:53,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-11 21:42:53,371 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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 21:42:53,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:42:53,435 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2022-07-11 21:42:53,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-11 21:42:53,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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) Word has length 35 [2022-07-11 21:42:53,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:42:53,437 INFO L225 Difference]: With dead ends: 68 [2022-07-11 21:42:53,437 INFO L226 Difference]: Without dead ends: 53 [2022-07-11 21:42:53,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-11 21:42:53,438 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 21:42:53,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 82 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 21:42:53,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-11 21:42:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-07-11 21:42:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 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 21:42:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-07-11 21:42:53,444 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 35 [2022-07-11 21:42:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:42:53,445 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-07-11 21:42:53,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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 21:42:53,445 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-07-11 21:42:53,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-11 21:42:53,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:42:53,446 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:42:53,471 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 21:42:53,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:42:53,660 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:42:53,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:42:53,660 INFO L85 PathProgramCache]: Analyzing trace with hash 678799712, now seen corresponding path program 4 times [2022-07-11 21:42:53,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:42:53,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012783377] [2022-07-11 21:42:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:42:53,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:42:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:42:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-11 21:42:53,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:42:53,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012783377] [2022-07-11 21:42:53,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012783377] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:42:53,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650642762] [2022-07-11 21:42:53,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 21:42:53,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:42:53,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:42:53,896 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 21:42:53,897 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 21:42:54,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 21:42:54,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:42:54,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-11 21:42:54,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:42:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-11 21:42:54,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:42:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-11 21:42:54,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650642762] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:42:54,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:42:54,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-07-11 21:42:54,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490285670] [2022-07-11 21:42:54,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:42:54,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-11 21:42:54,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:42:54,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-11 21:42:54,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-11 21:42:54,283 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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 21:42:54,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:42:54,383 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2022-07-11 21:42:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-11 21:42:54,385 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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 49 [2022-07-11 21:42:54,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:42:54,386 INFO L225 Difference]: With dead ends: 105 [2022-07-11 21:42:54,386 INFO L226 Difference]: Without dead ends: 78 [2022-07-11 21:42:54,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-11 21:42:54,388 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 21:42:54,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 67 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 21:42:54,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-11 21:42:54,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-11 21:42:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:42:54,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-07-11 21:42:54,395 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 49 [2022-07-11 21:42:54,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:42:54,395 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-07-11 21:42:54,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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 21:42:54,395 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-07-11 21:42:54,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-11 21:42:54,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:42:54,397 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:42:54,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 21:42:54,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:42:54,604 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:42:54,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:42:54,604 INFO L85 PathProgramCache]: Analyzing trace with hash -408162682, now seen corresponding path program 5 times [2022-07-11 21:42:54,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:42:54,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064684188] [2022-07-11 21:42:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:42:54,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:42:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:42:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-11 21:42:54,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:42:54,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064684188] [2022-07-11 21:42:54,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064684188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:42:54,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180258133] [2022-07-11 21:42:54,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 21:42:54,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:42:54,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:42:54,998 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 21:42:55,023 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 21:43:37,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-07-11 21:43:37,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:43:37,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-11 21:43:37,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:43:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-11 21:43:37,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:43:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-11 21:43:37,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180258133] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:43:37,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:43:37,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-07-11 21:43:37,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630322563] [2022-07-11 21:43:37,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:43:37,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-11 21:43:37,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:43:37,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-11 21:43:37,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-11 21:43:37,988 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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 21:43:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:43:38,155 INFO L93 Difference]: Finished difference Result 157 states and 186 transitions. [2022-07-11 21:43:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-11 21:43:38,155 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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 75 [2022-07-11 21:43:38,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:43:38,160 INFO L225 Difference]: With dead ends: 157 [2022-07-11 21:43:38,161 INFO L226 Difference]: Without dead ends: 130 [2022-07-11 21:43:38,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-11 21:43:38,163 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 21:43:38,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 54 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 21:43:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-11 21:43:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-07-11 21:43:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 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 21:43:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2022-07-11 21:43:38,178 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 75 [2022-07-11 21:43:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:43:38,178 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2022-07-11 21:43:38,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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 21:43:38,179 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2022-07-11 21:43:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-11 21:43:38,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:43:38,182 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:43:38,234 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 21:43:38,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:43:38,408 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:43:38,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:43:38,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1135775314, now seen corresponding path program 6 times [2022-07-11 21:43:38,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:43:38,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047328089] [2022-07-11 21:43:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:43:38,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:43:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:43:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-11 21:43:39,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:43:39,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047328089] [2022-07-11 21:43:39,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047328089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:43:39,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973579840] [2022-07-11 21:43:39,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 21:43:39,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:43:39,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:43:39,556 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 21:43:39,559 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 21:43:39,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-11 21:43:39,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:43:39,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-11 21:43:39,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:43:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2022-07-11 21:43:40,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:43:40,530 INFO L356 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2022-07-11 21:43:40,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-07-11 21:43:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2022-07-11 21:43:40,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973579840] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:43:40,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:43:40,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 8, 7] total 63 [2022-07-11 21:43:40,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967653309] [2022-07-11 21:43:40,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:43:40,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-11 21:43:40,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:43:40,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-11 21:43:40,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1411, Invalid=2495, Unknown=0, NotChecked=0, Total=3906 [2022-07-11 21:43:40,591 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 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 21:43:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:43:42,350 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2022-07-11 21:43:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-11 21:43:42,357 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 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 127 [2022-07-11 21:43:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:43:42,358 INFO L225 Difference]: With dead ends: 165 [2022-07-11 21:43:42,358 INFO L226 Difference]: Without dead ends: 138 [2022-07-11 21:43:42,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4197, Invalid=9609, Unknown=0, NotChecked=0, Total=13806 [2022-07-11 21:43:42,363 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 21:43:42,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 63 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 21:43:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-11 21:43:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2022-07-11 21:43:42,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 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 21:43:42,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2022-07-11 21:43:42,384 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 127 [2022-07-11 21:43:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:43:42,384 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2022-07-11 21:43:42,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 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 21:43:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2022-07-11 21:43:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-11 21:43:42,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:43:42,391 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:43:42,422 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 21:43:42,617 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,SelfDestructingSolverStorable8 [2022-07-11 21:43:42,618 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:43:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:43:42,618 INFO L85 PathProgramCache]: Analyzing trace with hash 2019846662, now seen corresponding path program 1 times [2022-07-11 21:43:42,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:43:42,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535501949] [2022-07-11 21:43:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:43:42,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:43:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:43:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-11 21:43:43,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:43:43,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535501949] [2022-07-11 21:43:43,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535501949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:43:43,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301196364] [2022-07-11 21:43:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:43:43,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:43:43,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:43:43,713 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 21:43:43,713 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 21:43:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:43:43,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-11 21:43:43,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:43:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-11 21:43:44,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:43:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-11 21:43:46,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301196364] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:43:46,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:43:46,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-07-11 21:43:46,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609226724] [2022-07-11 21:43:46,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:43:46,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-11 21:43:46,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:43:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-11 21:43:46,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-11 21:43:46,913 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 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 21:43:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:43:47,226 INFO L93 Difference]: Finished difference Result 269 states and 325 transitions. [2022-07-11 21:43:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-11 21:43:47,227 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 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 133 [2022-07-11 21:43:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:43:47,229 INFO L225 Difference]: With dead ends: 269 [2022-07-11 21:43:47,229 INFO L226 Difference]: Without dead ends: 240 [2022-07-11 21:43:47,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-11 21:43:47,232 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 156 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 21:43:47,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 106 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 21:43:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-11 21:43:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-07-11 21:43:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 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 21:43:47,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2022-07-11 21:43:47,266 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 133 [2022-07-11 21:43:47,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:43:47,267 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2022-07-11 21:43:47,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 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 21:43:47,268 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2022-07-11 21:43:47,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-11 21:43:47,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:43:47,271 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:43:47,299 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 21:43:47,495 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,SelfDestructingSolverStorable9 [2022-07-11 21:43:47,496 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:43:47,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:43:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash -651492388, now seen corresponding path program 2 times [2022-07-11 21:43:47,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:43:47,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54712142] [2022-07-11 21:43:47,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:43:47,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:43:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:43:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10869 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-11 21:43:51,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:43:51,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54712142] [2022-07-11 21:43:51,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54712142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:43:51,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409125583] [2022-07-11 21:43:51,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 21:43:51,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:43:51,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:43:51,483 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 21:43:51,486 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 21:43:51,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 21:43:51,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:43:51,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-11 21:43:51,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:43:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10869 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-11 21:43:52,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:44:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10869 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-11 21:44:01,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409125583] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:44:01,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:44:01,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2022-07-11 21:44:01,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692478137] [2022-07-11 21:44:01,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:44:01,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-07-11 21:44:01,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:44:01,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-07-11 21:44:01,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-07-11 21:44:01,912 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 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 21:44:02,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:44:02,757 INFO L93 Difference]: Finished difference Result 481 states and 590 transitions. [2022-07-11 21:44:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-07-11 21:44:02,758 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 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 239 [2022-07-11 21:44:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:44:02,760 INFO L225 Difference]: With dead ends: 481 [2022-07-11 21:44:02,760 INFO L226 Difference]: Without dead ends: 452 [2022-07-11 21:44:02,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-07-11 21:44:02,764 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 315 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 21:44:02,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 106 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 21:44:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-07-11 21:44:02,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2022-07-11 21:44:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.0066518847006651) internal successors, (454), 451 states have internal predecessors, (454), 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 21:44:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 454 transitions. [2022-07-11 21:44:02,779 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 454 transitions. Word has length 239 [2022-07-11 21:44:02,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:44:02,779 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 454 transitions. [2022-07-11 21:44:02,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 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 21:44:02,780 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 454 transitions. [2022-07-11 21:44:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-07-11 21:44:02,785 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:44:02,786 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:44:02,813 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 21:44:03,007 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,SelfDestructingSolverStorable10 [2022-07-11 21:44:03,008 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:44:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:44:03,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1634761464, now seen corresponding path program 3 times [2022-07-11 21:44:03,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:44:03,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629814222] [2022-07-11 21:44:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:44:03,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:44:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:44:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 44153 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-11 21:44:17,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:44:17,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629814222] [2022-07-11 21:44:17,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629814222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:44:17,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667020334] [2022-07-11 21:44:17,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 21:44:17,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:44:17,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:44:17,039 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 21:44:17,039 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 21:44:17,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-11 21:44:17,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:44:17,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-11 21:44:17,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:44:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 44153 backedges. 0 proven. 446 refuted. 0 times theorem prover too weak. 43707 trivial. 0 not checked. [2022-07-11 21:44:19,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:44:19,715 INFO L356 Elim1Store]: treesize reduction 50, result has 48.5 percent of original size [2022-07-11 21:44:19,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 54 [2022-07-11 21:44:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 44153 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 44126 trivial. 0 not checked. [2022-07-11 21:44:19,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667020334] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:44:19,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:44:19,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [213, 11, 9] total 228 [2022-07-11 21:44:19,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323557645] [2022-07-11 21:44:19,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:44:19,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2022-07-11 21:44:19,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:44:19,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2022-07-11 21:44:19,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22840, Invalid=28916, Unknown=0, NotChecked=0, Total=51756 [2022-07-11 21:44:19,892 INFO L87 Difference]: Start difference. First operand 452 states and 454 transitions. Second operand has 228 states, 228 states have (on average 2.0964912280701755) internal successors, (478), 228 states have internal predecessors, (478), 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 21:44:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:44:36,987 INFO L93 Difference]: Finished difference Result 491 states and 496 transitions. [2022-07-11 21:44:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-07-11 21:44:36,987 INFO L78 Accepts]: Start accepts. Automaton has has 228 states, 228 states have (on average 2.0964912280701755) internal successors, (478), 228 states have internal predecessors, (478), 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 451 [2022-07-11 21:44:36,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:44:36,990 INFO L225 Difference]: With dead ends: 491 [2022-07-11 21:44:36,990 INFO L226 Difference]: Without dead ends: 462 [2022-07-11 21:44:37,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1327 GetRequests, 886 SyntacticMatches, 1 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27088 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=67812, Invalid=127110, Unknown=0, NotChecked=0, Total=194922 [2022-07-11 21:44:37,004 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 270 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 21:44:37,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 154 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 21:44:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-07-11 21:44:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 458. [2022-07-11 21:44:37,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.0065645514223194) internal successors, (460), 457 states have internal predecessors, (460), 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 21:44:37,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 460 transitions. [2022-07-11 21:44:37,023 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 460 transitions. Word has length 451 [2022-07-11 21:44:37,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:44:37,024 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 460 transitions. [2022-07-11 21:44:37,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 228 states, 228 states have (on average 2.0964912280701755) internal successors, (478), 228 states have internal predecessors, (478), 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 21:44:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 460 transitions. [2022-07-11 21:44:37,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2022-07-11 21:44:37,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:44:37,032 INFO L195 NwaCegarLoop]: trace histogram [211, 211, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:44:37,060 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 21:44:37,247 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,SelfDestructingSolverStorable11 [2022-07-11 21:44:37,247 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:44:37,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:44:37,248 INFO L85 PathProgramCache]: Analyzing trace with hash 792090300, now seen corresponding path program 4 times [2022-07-11 21:44:37,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:44:37,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972321939] [2022-07-11 21:44:37,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:44:37,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:44:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:44:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 44580 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-11 21:44:50,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:44:50,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972321939] [2022-07-11 21:44:50,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972321939] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:44:50,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137029790] [2022-07-11 21:44:50,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 21:44:50,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:44:50,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:44:50,770 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 21:44:50,771 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 21:44:51,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 21:44:51,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:44:51,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 3735 conjuncts, 213 conjunts are in the unsatisfiable core [2022-07-11 21:44:51,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:44:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 44580 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-11 21:44:52,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:45:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 44580 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-11 21:45:32,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137029790] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:45:32,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:45:32,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 214, 214] total 427 [2022-07-11 21:45:32,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439619196] [2022-07-11 21:45:32,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:45:32,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 427 states [2022-07-11 21:45:32,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:45:32,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 427 interpolants. [2022-07-11 21:45:32,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2022-07-11 21:45:32,079 INFO L87 Difference]: Start difference. First operand 458 states and 460 transitions. Second operand has 427 states, 427 states have (on average 2.0234192037470726) internal successors, (864), 427 states have internal predecessors, (864), 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 21:45:37,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:45:37,497 INFO L93 Difference]: Finished difference Result 917 states and 1133 transitions. [2022-07-11 21:45:37,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 426 states. [2022-07-11 21:45:37,500 INFO L78 Accepts]: Start accepts. Automaton has has 427 states, 427 states have (on average 2.0234192037470726) internal successors, (864), 427 states have internal predecessors, (864), 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 457 [2022-07-11 21:45:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:45:37,504 INFO L225 Difference]: With dead ends: 917 [2022-07-11 21:45:37,504 INFO L226 Difference]: Without dead ends: 884 [2022-07-11 21:45:37,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1126 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 51.9s TimeCoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2022-07-11 21:45:37,517 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 636 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:45:37,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 145 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-11 21:45:37,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-07-11 21:45:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 884. [2022-07-11 21:45:37,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 1.0033975084937712) internal successors, (886), 883 states have internal predecessors, (886), 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 21:45:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 886 transitions. [2022-07-11 21:45:37,559 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 886 transitions. Word has length 457 [2022-07-11 21:45:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:45:37,560 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 886 transitions. [2022-07-11 21:45:37,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 427 states, 427 states have (on average 2.0234192037470726) internal successors, (864), 427 states have internal predecessors, (864), 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 21:45:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 886 transitions. [2022-07-11 21:45:37,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 884 [2022-07-11 21:45:37,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:45:37,568 INFO L195 NwaCegarLoop]: trace histogram [424, 424, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:45:37,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-11 21:45:37,784 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,SelfDestructingSolverStorable12 [2022-07-11 21:45:37,784 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:45:37,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:45:37,785 INFO L85 PathProgramCache]: Analyzing trace with hash -341191598, now seen corresponding path program 5 times [2022-07-11 21:45:37,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:45:37,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985789446] [2022-07-11 21:45:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:45:37,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:45:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:46:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 179835 backedges. 0 proven. 179776 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-11 21:46:31,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:46:31,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985789446] [2022-07-11 21:46:31,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985789446] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:46:31,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517337783] [2022-07-11 21:46:31,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 21:46:31,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:46:31,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:46:31,377 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 21:46:31,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process