./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/loops-crafted-1/mono-crafted_1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 15:57:49,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 15:57:49,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 15:57:49,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 15:57:49,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 15:57:49,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 15:57:49,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 15:57:49,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 15:57:49,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 15:57:49,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 15:57:49,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 15:57:49,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 15:57:49,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 15:57:49,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 15:57:49,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 15:57:49,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 15:57:49,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 15:57:49,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 15:57:49,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 15:57:49,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 15:57:49,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 15:57:49,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 15:57:49,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 15:57:49,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 15:57:49,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 15:57:49,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 15:57:49,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 15:57:49,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 15:57:49,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 15:57:49,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 15:57:49,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 15:57:49,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 15:57:49,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 15:57:49,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 15:57:49,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 15:57:49,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 15:57:49,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 15:57:49,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 15:57:49,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 15:57:49,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 15:57:49,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 15:57:49,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 15:57:49,545 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 15:57:49,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 15:57:49,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 15:57:49,546 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 15:57:49,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 15:57:49,546 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 15:57:49,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 15:57:49,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 15:57:49,547 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 15:57:49,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 15:57:49,547 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 15:57:49,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 15:57:49,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 15:57:49,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 15:57:49,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 15:57:49,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 15:57:49,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 15:57:49,548 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 15:57:49,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 15:57:49,549 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 15:57:49,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 15:57:49,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 15:57:49,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 15:57:49,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 15:57:49,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 15:57:49,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 15:57:49,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 15:57:49,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 15:57:49,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 15:57:49,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 15:57:49,550 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 15:57:49,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 15:57:49,551 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 15:57:49,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 15:57:49,551 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 15:57:49,551 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 [2023-02-18 15:57:49,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 15:57:49,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 15:57:49,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 15:57:49,765 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 15:57:49,766 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 15:57:49,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2023-02-18 15:57:50,655 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 15:57:50,824 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 15:57:50,825 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2023-02-18 15:57:50,828 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57e159178/ba47fdf9bd414e9ca48c036c7085eb53/FLAGc2da2610b [2023-02-18 15:57:51,241 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57e159178/ba47fdf9bd414e9ca48c036c7085eb53 [2023-02-18 15:57:51,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 15:57:51,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 15:57:51,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 15:57:51,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 15:57:51,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 15:57:51,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:57:51" (1/1) ... [2023-02-18 15:57:51,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@beed8f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:51, skipping insertion in model container [2023-02-18 15:57:51,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:57:51" (1/1) ... [2023-02-18 15:57:51,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 15:57:51,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 15:57:51,376 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c[318,331] [2023-02-18 15:57:51,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 15:57:51,395 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 15:57:51,404 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c[318,331] [2023-02-18 15:57:51,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 15:57:51,415 INFO L208 MainTranslator]: Completed translation [2023-02-18 15:57:51,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:51 WrapperNode [2023-02-18 15:57:51,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 15:57:51,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 15:57:51,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 15:57:51,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 15:57:51,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:51" (1/1) ... [2023-02-18 15:57:51,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:51" (1/1) ... [2023-02-18 15:57:51,438 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2023-02-18 15:57:51,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 15:57:51,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 15:57:51,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 15:57:51,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 15:57:51,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:51" (1/1) ... [2023-02-18 15:57:51,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:51" (1/1) ... [2023-02-18 15:57:51,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:51" (1/1) ... [2023-02-18 15:57:51,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:51" (1/1) ... [2023-02-18 15:57:51,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:51" (1/1) ... [2023-02-18 15:57:51,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:51" (1/1) ... [2023-02-18 15:57:51,456 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:51" (1/1) ... [2023-02-18 15:57:51,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:51" (1/1) ... [2023-02-18 15:57:51,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 15:57:51,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 15:57:51,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 15:57:51,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 15:57:51,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:51" (1/1) ... [2023-02-18 15:57:51,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 15:57:51,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:51,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 15:57:51,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 15:57:51,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 15:57:51,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 15:57:51,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 15:57:51,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 15:57:51,555 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 15:57:51,557 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 15:57:51,684 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 15:57:51,689 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 15:57:51,689 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 15:57:51,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:57:51 BoogieIcfgContainer [2023-02-18 15:57:51,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 15:57:51,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 15:57:51,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 15:57:51,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 15:57:51,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 03:57:51" (1/3) ... [2023-02-18 15:57:51,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13893e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:57:51, skipping insertion in model container [2023-02-18 15:57:51,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:51" (2/3) ... [2023-02-18 15:57:51,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13893e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:57:51, skipping insertion in model container [2023-02-18 15:57:51,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:57:51" (3/3) ... [2023-02-18 15:57:51,700 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2023-02-18 15:57:51,712 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 15:57:51,713 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 15:57:51,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 15:57:51,757 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@529aacf4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 15:57:51,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 15:57:51,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:51,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 15:57:51,765 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:51,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:51,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:51,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2023-02-18 15:57:51,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:51,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909475738] [2023-02-18 15:57:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:51,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:51,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:51,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909475738] [2023-02-18 15:57:51,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909475738] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:57:51,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:57:51,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 15:57:51,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254278129] [2023-02-18 15:57:51,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:57:51,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 15:57:51,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 15:57:51,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 15:57:51,905 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:51,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:51,913 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2023-02-18 15:57:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 15:57:51,915 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-02-18 15:57:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:51,919 INFO L225 Difference]: With dead ends: 22 [2023-02-18 15:57:51,919 INFO L226 Difference]: Without dead ends: 9 [2023-02-18 15:57:51,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 15:57:51,924 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:51,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-02-18 15:57:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-02-18 15:57:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2023-02-18 15:57:51,942 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2023-02-18 15:57:51,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:51,943 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2023-02-18 15:57:51,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:51,943 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2023-02-18 15:57:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 15:57:51,943 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:51,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:51,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 15:57:51,944 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:51,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:51,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2023-02-18 15:57:51,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:51,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887774352] [2023-02-18 15:57:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:51,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:51,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:51,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887774352] [2023-02-18 15:57:51,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887774352] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:57:51,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:57:51,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 15:57:51,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894978026] [2023-02-18 15:57:51,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:57:51,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 15:57:51,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:51,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 15:57:51,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:57:51,990 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:52,002 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2023-02-18 15:57:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 15:57:52,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-02-18 15:57:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:52,003 INFO L225 Difference]: With dead ends: 18 [2023-02-18 15:57:52,003 INFO L226 Difference]: Without dead ends: 11 [2023-02-18 15:57:52,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:57:52,004 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:52,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:52,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-18 15:57:52,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-18 15:57:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-02-18 15:57:52,007 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2023-02-18 15:57:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:52,007 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-02-18 15:57:52,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-02-18 15:57:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 15:57:52,008 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:52,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:52,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 15:57:52,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:52,009 INFO L85 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2023-02-18 15:57:52,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:52,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288369415] [2023-02-18 15:57:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:52,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:57:52,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:52,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288369415] [2023-02-18 15:57:52,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288369415] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:57:52,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:57:52,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 15:57:52,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274229850] [2023-02-18 15:57:52,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:57:52,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 15:57:52,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:52,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 15:57:52,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:57:52,050 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. 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) [2023-02-18 15:57:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:52,058 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-02-18 15:57:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 15:57:52,058 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 [2023-02-18 15:57:52,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:52,059 INFO L225 Difference]: With dead ends: 16 [2023-02-18 15:57:52,059 INFO L226 Difference]: Without dead ends: 12 [2023-02-18 15:57:52,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:57:52,060 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:52,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:52,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-18 15:57:52,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-18 15:57:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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) [2023-02-18 15:57:52,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-02-18 15:57:52,063 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2023-02-18 15:57:52,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:52,063 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-02-18 15:57:52,064 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) [2023-02-18 15:57:52,064 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-02-18 15:57:52,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 15:57:52,064 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:52,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:52,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 15:57:52,065 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:52,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:52,065 INFO L85 PathProgramCache]: Analyzing trace with hash 698628545, now seen corresponding path program 1 times [2023-02-18 15:57:52,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:52,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448638219] [2023-02-18 15:57:52,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:52,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:57:52,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:52,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448638219] [2023-02-18 15:57:52,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448638219] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:52,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663615029] [2023-02-18 15:57:52,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:52,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:52,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:52,117 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:57:52,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 15:57:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:52,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 15:57:52,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:57:52,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:57:52,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663615029] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:52,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:52,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-18 15:57:52,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839690979] [2023-02-18 15:57:52,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:52,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 15:57:52,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:52,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 15:57:52,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-18 15:57:52,195 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:52,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:52,220 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2023-02-18 15:57:52,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 15:57:52,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 15:57:52,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:52,222 INFO L225 Difference]: With dead ends: 25 [2023-02-18 15:57:52,222 INFO L226 Difference]: Without dead ends: 17 [2023-02-18 15:57:52,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-18 15:57:52,223 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:52,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:52,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-18 15:57:52,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-18 15:57:52,226 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) [2023-02-18 15:57:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-02-18 15:57:52,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2023-02-18 15:57:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:52,227 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-02-18 15:57:52,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:52,227 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-02-18 15:57:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 15:57:52,228 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:52,228 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:52,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 15:57:52,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:52,435 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash -693598994, now seen corresponding path program 1 times [2023-02-18 15:57:52,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:52,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866733306] [2023-02-18 15:57:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:52,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:52,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:52,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866733306] [2023-02-18 15:57:52,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866733306] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:52,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982693483] [2023-02-18 15:57:52,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:52,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:52,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:52,517 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:57:52,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 15:57:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:52,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 15:57:52,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:52,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:52,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982693483] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:52,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:52,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-18 15:57:52,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133034699] [2023-02-18 15:57:52,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:52,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 15:57:52,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:52,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 15:57:52,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-02-18 15:57:52,597 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:52,620 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2023-02-18 15:57:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 15:57:52,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 15:57:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:52,621 INFO L225 Difference]: With dead ends: 36 [2023-02-18 15:57:52,622 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 15:57:52,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-02-18 15:57:52,623 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:52,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 15:57:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-18 15:57:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:52,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-02-18 15:57:52,628 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2023-02-18 15:57:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:52,628 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-02-18 15:57:52,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-02-18 15:57:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 15:57:52,629 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:52,629 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:52,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:52,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:52,834 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:52,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:52,834 INFO L85 PathProgramCache]: Analyzing trace with hash 219186682, now seen corresponding path program 2 times [2023-02-18 15:57:52,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:52,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005872062] [2023-02-18 15:57:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:52,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:52,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:52,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005872062] [2023-02-18 15:57:52,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005872062] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:52,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404839212] [2023-02-18 15:57:52,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:57:52,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:52,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:52,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:57:52,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 15:57:53,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:57:53,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:53,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 15:57:53,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:53,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:53,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404839212] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:53,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:53,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-02-18 15:57:53,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627431722] [2023-02-18 15:57:53,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:53,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 15:57:53,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:53,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 15:57:53,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-18 15:57:53,167 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:53,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:53,235 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2023-02-18 15:57:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 15:57:53,246 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-18 15:57:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:53,247 INFO L225 Difference]: With dead ends: 52 [2023-02-18 15:57:53,247 INFO L226 Difference]: Without dead ends: 41 [2023-02-18 15:57:53,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-18 15:57:53,248 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:53,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:57:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-18 15:57:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-18 15:57:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-02-18 15:57:53,253 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 24 [2023-02-18 15:57:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:53,253 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-02-18 15:57:53,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:53,254 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-02-18 15:57:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 15:57:53,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:53,254 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:53,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:53,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:53,455 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:53,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1801004050, now seen corresponding path program 3 times [2023-02-18 15:57:53,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:53,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173959668] [2023-02-18 15:57:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:53,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:53,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:53,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173959668] [2023-02-18 15:57:53,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173959668] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:53,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063973443] [2023-02-18 15:57:53,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:57:53,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:53,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:53,663 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:57:53,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 15:57:53,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 15:57:53,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:53,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 15:57:53,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-02-18 15:57:53,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-02-18 15:57:53,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063973443] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:53,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:53,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2023-02-18 15:57:53,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13114049] [2023-02-18 15:57:53,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:53,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 15:57:53,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:53,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 15:57:53,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-02-18 15:57:53,815 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:53,965 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2023-02-18 15:57:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 15:57:53,966 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-18 15:57:53,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:53,968 INFO L225 Difference]: With dead ends: 64 [2023-02-18 15:57:53,968 INFO L226 Difference]: Without dead ends: 53 [2023-02-18 15:57:53,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 15:57:53,975 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:53,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-18 15:57:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2023-02-18 15:57:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-02-18 15:57:53,985 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2023-02-18 15:57:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:53,986 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-02-18 15:57:53,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:53,986 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-02-18 15:57:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 15:57:53,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:53,986 INFO L195 NwaCegarLoop]: trace histogram [17, 15, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:53,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:54,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:54,192 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:54,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:54,193 INFO L85 PathProgramCache]: Analyzing trace with hash 842950389, now seen corresponding path program 4 times [2023-02-18 15:57:54,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:54,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531021232] [2023-02-18 15:57:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:54,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:57:54,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:54,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531021232] [2023-02-18 15:57:54,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531021232] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:54,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343812740] [2023-02-18 15:57:54,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:57:54,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:54,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:54,383 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:57:54,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 15:57:54,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:57:54,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:54,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 15:57:54,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:57:54,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:57:54,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343812740] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:54,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:54,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2023-02-18 15:57:54,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151495580] [2023-02-18 15:57:54,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:54,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 15:57:54,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:54,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 15:57:54,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 15:57:54,818 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:54,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:54,905 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2023-02-18 15:57:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 15:57:54,906 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 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 46 [2023-02-18 15:57:54,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:54,908 INFO L225 Difference]: With dead ends: 96 [2023-02-18 15:57:54,908 INFO L226 Difference]: Without dead ends: 81 [2023-02-18 15:57:54,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 15 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 15:57:54,910 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:54,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:57:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-18 15:57:54,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-02-18 15:57:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2023-02-18 15:57:54,925 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 46 [2023-02-18 15:57:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:54,926 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2023-02-18 15:57:54,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2023-02-18 15:57:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-18 15:57:54,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:54,929 INFO L195 NwaCegarLoop]: trace histogram [34, 32, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:54,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:55,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:55,135 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1726294200, now seen corresponding path program 5 times [2023-02-18 15:57:55,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:55,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365188384] [2023-02-18 15:57:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:55,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:57:55,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:55,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365188384] [2023-02-18 15:57:55,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365188384] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:55,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205680914] [2023-02-18 15:57:55,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:57:55,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:55,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:55,653 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:57:55,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 15:57:55,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2023-02-18 15:57:55,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:55,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 15:57:55,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:57:56,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:57:57,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205680914] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:57,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:57,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2023-02-18 15:57:57,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412956856] [2023-02-18 15:57:57,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:57,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-18 15:57:57,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:57,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-18 15:57:57,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 15:57:57,061 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:57,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:57,234 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2023-02-18 15:57:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-18 15:57:57,235 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 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 80 [2023-02-18 15:57:57,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:57,236 INFO L225 Difference]: With dead ends: 164 [2023-02-18 15:57:57,236 INFO L226 Difference]: Without dead ends: 149 [2023-02-18 15:57:57,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 94 SyntacticMatches, 32 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 15:57:57,238 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:57,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:57:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-18 15:57:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-02-18 15:57:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2023-02-18 15:57:57,246 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 80 [2023-02-18 15:57:57,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:57,247 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2023-02-18 15:57:57,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:57,247 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2023-02-18 15:57:57,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-02-18 15:57:57,248 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:57,248 INFO L195 NwaCegarLoop]: trace histogram [68, 66, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:57,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:57,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:57,453 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:57,454 INFO L85 PathProgramCache]: Analyzing trace with hash 439839150, now seen corresponding path program 6 times [2023-02-18 15:57:57,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:57,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439588817] [2023-02-18 15:57:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:57,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:57:59,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439588817] [2023-02-18 15:57:59,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439588817] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328720392] [2023-02-18 15:57:59,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:57:59,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:59,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:59,293 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:57:59,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 15:57:59,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 15:57:59,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:59,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 15:57:59,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 202 proven. 15 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2023-02-18 15:57:59,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 202 proven. 15 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2023-02-18 15:57:59,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328720392] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:59,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:59,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 8, 8] total 81 [2023-02-18 15:57:59,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124021052] [2023-02-18 15:57:59,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:59,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-02-18 15:57:59,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:59,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-02-18 15:57:59,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2436, Invalid=4044, Unknown=0, NotChecked=0, Total=6480 [2023-02-18 15:57:59,779 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:01,337 INFO L93 Difference]: Finished difference Result 179 states and 196 transitions. [2023-02-18 15:58:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-02-18 15:58:01,337 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 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 148 [2023-02-18 15:58:01,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:01,338 INFO L225 Difference]: With dead ends: 179 [2023-02-18 15:58:01,338 INFO L226 Difference]: Without dead ends: 164 [2023-02-18 15:58:01,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 280 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3384 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7729, Invalid=14027, Unknown=0, NotChecked=0, Total=21756 [2023-02-18 15:58:01,342 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:01,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 42 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:58:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-02-18 15:58:01,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 158. [2023-02-18 15:58:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0254777070063694) internal successors, (161), 157 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2023-02-18 15:58:01,351 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 148 [2023-02-18 15:58:01,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:01,351 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2023-02-18 15:58:01,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2023-02-18 15:58:01,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-02-18 15:58:01,353 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:01,353 INFO L195 NwaCegarLoop]: trace histogram [69, 67, 12, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:01,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 15:58:01,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:01,565 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1679521733, now seen corresponding path program 7 times [2023-02-18 15:58:01,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:01,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411023192] [2023-02-18 15:58:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:01,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-18 15:58:03,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:03,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411023192] [2023-02-18 15:58:03,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411023192] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:03,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245921365] [2023-02-18 15:58:03,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 15:58:03,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:03,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:03,353 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:58:03,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 15:58:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:03,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-18 15:58:03,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-18 15:58:04,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-18 15:58:08,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245921365] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:08,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:08,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2023-02-18 15:58:08,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327044233] [2023-02-18 15:58:08,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:08,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2023-02-18 15:58:08,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:08,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2023-02-18 15:58:08,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2023-02-18 15:58:08,482 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:08,787 INFO L93 Difference]: Finished difference Result 318 states and 393 transitions. [2023-02-18 15:58:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-02-18 15:58:08,787 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 0 states have call successors, (0), 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 157 [2023-02-18 15:58:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:08,789 INFO L225 Difference]: With dead ends: 318 [2023-02-18 15:58:08,804 INFO L226 Difference]: Without dead ends: 296 [2023-02-18 15:58:08,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 178 SyntacticMatches, 67 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2612 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2023-02-18 15:58:08,806 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:08,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:58:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-02-18 15:58:08,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2023-02-18 15:58:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.0135593220338983) internal successors, (299), 295 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 299 transitions. [2023-02-18 15:58:08,819 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 299 transitions. Word has length 157 [2023-02-18 15:58:08,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:08,820 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 299 transitions. [2023-02-18 15:58:08,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:08,820 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 299 transitions. [2023-02-18 15:58:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-02-18 15:58:08,822 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:08,822 INFO L195 NwaCegarLoop]: trace histogram [138, 136, 12, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:08,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-18 15:58:09,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 15:58:09,027 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:09,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:09,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1112962452, now seen corresponding path program 8 times [2023-02-18 15:58:09,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:09,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760282074] [2023-02-18 15:58:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:09,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-18 15:58:15,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:15,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760282074] [2023-02-18 15:58:15,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760282074] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:15,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020446936] [2023-02-18 15:58:15,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:58:15,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:15,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:15,756 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:58:15,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 15:58:15,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:58:15,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:15,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 138 conjunts are in the unsatisfiable core [2023-02-18 15:58:15,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-18 15:58:20,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-18 15:58:36,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020446936] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:36,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:36,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2023-02-18 15:58:36,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120754172] [2023-02-18 15:58:36,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:36,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2023-02-18 15:58:36,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:36,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2023-02-18 15:58:36,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2023-02-18 15:58:36,051 INFO L87 Difference]: Start difference. First operand 296 states and 299 transitions. Second operand has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:37,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:37,104 INFO L93 Difference]: Finished difference Result 594 states and 738 transitions. [2023-02-18 15:58:37,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2023-02-18 15:58:37,105 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 0 states have call successors, (0), 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 295 [2023-02-18 15:58:37,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:37,106 INFO L225 Difference]: With dead ends: 594 [2023-02-18 15:58:37,106 INFO L226 Difference]: Without dead ends: 572 [2023-02-18 15:58:37,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 316 SyntacticMatches, 136 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9995 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2023-02-18 15:58:37,109 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:37,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 15:58:37,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2023-02-18 15:58:37,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2023-02-18 15:58:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 1.0070052539404553) internal successors, (575), 571 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 575 transitions. [2023-02-18 15:58:37,146 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 575 transitions. Word has length 295 [2023-02-18 15:58:37,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:37,146 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 575 transitions. [2023-02-18 15:58:37,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 575 transitions. [2023-02-18 15:58:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2023-02-18 15:58:37,152 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:37,152 INFO L195 NwaCegarLoop]: trace histogram [276, 274, 12, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:37,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 15:58:37,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:37,357 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:37,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:37,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1556540658, now seen corresponding path program 9 times [2023-02-18 15:58:37,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:37,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178188111] [2023-02-18 15:58:37,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:37,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:59:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-18 15:59:07,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:59:07,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178188111] [2023-02-18 15:59:07,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178188111] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:59:07,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816308192] [2023-02-18 15:59:07,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:59:07,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:59:07,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:59:07,429 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:59:07,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 15:59:07,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 15:59:07,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:59:07,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 15:59:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:59:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74880 trivial. 0 not checked. [2023-02-18 15:59:08,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:59:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74880 trivial. 0 not checked. [2023-02-18 15:59:08,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816308192] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:59:08,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:59:08,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 5, 5] total 283 [2023-02-18 15:59:08,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547276319] [2023-02-18 15:59:08,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:59:08,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 283 states [2023-02-18 15:59:08,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:59:08,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 283 interpolants. [2023-02-18 15:59:08,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39903, Invalid=39903, Unknown=0, NotChecked=0, Total=79806 [2023-02-18 15:59:08,513 INFO L87 Difference]: Start difference. First operand 572 states and 575 transitions. Second operand has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:59:09,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:59:09,660 INFO L93 Difference]: Finished difference Result 604 states and 619 transitions. [2023-02-18 15:59:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 283 states. [2023-02-18 15:59:09,661 INFO L78 Accepts]: Start accepts. Automaton has has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 0 states have call successors, (0), 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 571 [2023-02-18 15:59:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:59:09,665 INFO L225 Difference]: With dead ends: 604 [2023-02-18 15:59:09,665 INFO L226 Difference]: Without dead ends: 582 [2023-02-18 15:59:09,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1417 GetRequests, 1136 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=39903, Invalid=39903, Unknown=0, NotChecked=0, Total=79806 [2023-02-18 15:59:09,669 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 15:59:09,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 15:59:09,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-02-18 15:59:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2023-02-18 15:59:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.0137693631669535) internal successors, (589), 581 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:59:09,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 589 transitions. [2023-02-18 15:59:09,695 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 589 transitions. Word has length 571 [2023-02-18 15:59:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:59:09,695 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 589 transitions. [2023-02-18 15:59:09,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:59:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 589 transitions. [2023-02-18 15:59:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2023-02-18 15:59:09,702 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:59:09,702 INFO L195 NwaCegarLoop]: trace histogram [281, 275, 12, 6, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:59:09,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 15:59:09,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 15:59:09,906 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:59:09,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:59:09,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1493468617, now seen corresponding path program 10 times [2023-02-18 15:59:09,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:59:09,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896740158] [2023-02-18 15:59:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:59:09,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:59:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:59:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-02-18 15:59:40,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:59:40,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896740158] [2023-02-18 15:59:40,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896740158] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:59:40,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928684268] [2023-02-18 15:59:40,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:59:40,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:59:40,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:59:40,294 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:59:40,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 15:59:40,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:59:40,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:59:40,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 277 conjunts are in the unsatisfiable core [2023-02-18 15:59:40,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:00:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-02-18 16:00:01,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:01:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-02-18 16:01:04,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928684268] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:01:04,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:01:04,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 278, 278] total 555 [2023-02-18 16:01:04,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964018530] [2023-02-18 16:01:04,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:01:04,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 555 states [2023-02-18 16:01:04,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:01:04,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 555 interpolants. [2023-02-18 16:01:04,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2023-02-18 16:01:04,060 INFO L87 Difference]: Start difference. First operand 582 states and 589 transitions. Second operand has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:01:10,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:01:10,012 INFO L93 Difference]: Finished difference Result 1166 states and 1457 transitions. [2023-02-18 16:01:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 554 states. [2023-02-18 16:01:10,013 INFO L78 Accepts]: Start accepts. Automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 0 states have call successors, (0), 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 581 [2023-02-18 16:01:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:01:10,016 INFO L225 Difference]: With dead ends: 1166 [2023-02-18 16:01:10,016 INFO L226 Difference]: Without dead ends: 1136 [2023-02-18 16:01:10,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1438 GetRequests, 610 SyntacticMatches, 275 SemanticMatches, 553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39324 ImplicationChecksByTransitivity, 103.1s TimeCoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2023-02-18 16:01:10,026 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:01:10,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 16:01:10,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2023-02-18 16:01:10,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2023-02-18 16:01:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 1.0070484581497798) internal successors, (1143), 1135 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:01:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1143 transitions. [2023-02-18 16:01:10,063 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1143 transitions. Word has length 581 [2023-02-18 16:01:10,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:01:10,064 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1143 transitions. [2023-02-18 16:01:10,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:01:10,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1143 transitions. [2023-02-18 16:01:10,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1136 [2023-02-18 16:01:10,073 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:01:10,073 INFO L195 NwaCegarLoop]: trace histogram [558, 552, 12, 6, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:01:10,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 16:01:10,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 16:01:10,279 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:01:10,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:01:10,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1969744632, now seen corresponding path program 11 times [2023-02-18 16:01:10,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:01:10,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636009324] [2023-02-18 16:01:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:01:10,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:01:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:03:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 311442 backedges. 6083 proven. 305256 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-02-18 16:03:49,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:03:49,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636009324] [2023-02-18 16:03:49,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636009324] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:03:49,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130242661] [2023-02-18 16:03:49,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:03:49,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:03:49,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:03:49,395 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:03:49,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 16:03:50,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 559 check-sat command(s) [2023-02-18 16:03:50,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:03:50,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 2344 conjuncts, 554 conjunts are in the unsatisfiable core [2023-02-18 16:03:50,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:05:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 311442 backedges. 6083 proven. 305256 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-02-18 16:05:15,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:09:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 311442 backedges. 6083 proven. 305256 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-02-18 16:09:36,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130242661] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:09:36,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:09:36,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [555, 555, 555] total 1109 [2023-02-18 16:09:36,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038719732] [2023-02-18 16:09:36,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:09:36,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 1109 states [2023-02-18 16:09:36,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:09:36,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1109 interpolants. [2023-02-18 16:09:36,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614386, Invalid=614386, Unknown=0, NotChecked=0, Total=1228772 [2023-02-18 16:09:36,200 INFO L87 Difference]: Start difference. First operand 1136 states and 1143 transitions. Second operand has 1109 states, 1109 states have (on average 2.0072137060414788) internal successors, (2226), 1109 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)