./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_running-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_running-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:10:08,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:10:08,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:10:08,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:10:08,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:10:08,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:10:08,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:10:08,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:10:08,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:10:08,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:10:08,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:10:08,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:10:08,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:10:08,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:10:08,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:10:08,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:10:08,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:10:08,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:10:08,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:10:08,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:10:08,509 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:10:08,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:10:08,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:10:08,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:10:08,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:10:08,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:10:08,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:10:08,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:10:08,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:10:08,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:10:08,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:10:08,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:10:08,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:10:08,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:10:08,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:10:08,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:10:08,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:10:08,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:10:08,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:10:08,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:10:08,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:10:08,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:10:08,533 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:10:08,562 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:10:08,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:10:08,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:10:08,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:10:08,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:10:08,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:10:08,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:10:08,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:10:08,565 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:10:08,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:10:08,566 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:10:08,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:10:08,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:10:08,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:10:08,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:10:08,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:10:08,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:10:08,567 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:10:08,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:10:08,568 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:10:08,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:10:08,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:10:08,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:10:08,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:10:08,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:10:08,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:10:08,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:10:08,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:10:08,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:10:08,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:10:08,570 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:10:08,570 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:10:08,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:10:08,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 [2022-07-19 09:10:08,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:10:08,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:10:08,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:10:08,777 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:10:08,777 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:10:08,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_running-2.i [2022-07-19 09:10:08,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3291a597/4e4f12266b63414197ab4aa4d773ab4e/FLAG369bd3317 [2022-07-19 09:10:09,240 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:10:09,241 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-2.i [2022-07-19 09:10:09,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3291a597/4e4f12266b63414197ab4aa4d773ab4e/FLAG369bd3317 [2022-07-19 09:10:09,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3291a597/4e4f12266b63414197ab4aa4d773ab4e [2022-07-19 09:10:09,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:10:09,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:10:09,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:10:09,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:10:09,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:10:09,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:10:09" (1/1) ... [2022-07-19 09:10:09,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@410ccdf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:09, skipping insertion in model container [2022-07-19 09:10:09,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:10:09" (1/1) ... [2022-07-19 09:10:09,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:10:09,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:10:09,396 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-2.i[811,824] [2022-07-19 09:10:09,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:10:09,416 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:10:09,427 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-2.i[811,824] [2022-07-19 09:10:09,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:10:09,444 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:10:09,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:09 WrapperNode [2022-07-19 09:10:09,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:10:09,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:10:09,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:10:09,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:10:09,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:09" (1/1) ... [2022-07-19 09:10:09,459 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:09" (1/1) ... [2022-07-19 09:10:09,478 INFO L137 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-07-19 09:10:09,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:10:09,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:10:09,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:10:09,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:10:09,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:09" (1/1) ... [2022-07-19 09:10:09,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:09" (1/1) ... [2022-07-19 09:10:09,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:09" (1/1) ... [2022-07-19 09:10:09,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:09" (1/1) ... [2022-07-19 09:10:09,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:09" (1/1) ... [2022-07-19 09:10:09,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:09" (1/1) ... [2022-07-19 09:10:09,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:09" (1/1) ... [2022-07-19 09:10:09,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:10:09,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:10:09,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:10:09,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:10:09,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:09" (1/1) ... [2022-07-19 09:10:09,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:10:09,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:09,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 09:10:09,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 09:10:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:10:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:10:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 09:10:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:10:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:10:09,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:10:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:10:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 09:10:09,619 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:10:09,620 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:10:09,747 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:10:09,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:10:09,752 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 09:10:09,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:10:09 BoogieIcfgContainer [2022-07-19 09:10:09,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:10:09,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:10:09,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:10:09,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:10:09,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:10:09" (1/3) ... [2022-07-19 09:10:09,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24aaedb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:10:09, skipping insertion in model container [2022-07-19 09:10:09,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:09" (2/3) ... [2022-07-19 09:10:09,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24aaedb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:10:09, skipping insertion in model container [2022-07-19 09:10:09,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:10:09" (3/3) ... [2022-07-19 09:10:09,760 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2022-07-19 09:10:09,770 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:10:09,770 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:10:09,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:10:09,814 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@a583594, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@76bbd592 [2022-07-19 09:10:09,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:10:09,820 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:09,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-19 09:10:09,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:09,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:09,826 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:09,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2030235279, now seen corresponding path program 1 times [2022-07-19 09:10:09,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:09,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427643088] [2022-07-19 09:10:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:09,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:10:10,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:10,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427643088] [2022-07-19 09:10:10,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427643088] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:10:10,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:10:10,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:10:10,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545068950] [2022-07-19 09:10:10,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:10:10,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:10:10,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:10,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:10:10,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:10:10,061 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:10,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:10,138 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2022-07-19 09:10:10,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:10:10,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2022-07-19 09:10:10,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:10,145 INFO L225 Difference]: With dead ends: 56 [2022-07-19 09:10:10,146 INFO L226 Difference]: Without dead ends: 32 [2022-07-19 09:10:10,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:10:10,150 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:10,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 34 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:10:10,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-19 09:10:10,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-07-19 09:10:10,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:10,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-07-19 09:10:10,175 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2022-07-19 09:10:10,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:10,176 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-07-19 09:10:10,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:10,176 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-07-19 09:10:10,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 09:10:10,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:10,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:10,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:10:10,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:10,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:10,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1221461665, now seen corresponding path program 1 times [2022-07-19 09:10:10,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:10,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001323291] [2022-07-19 09:10:10,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:10,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 09:10:10,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:10,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001323291] [2022-07-19 09:10:10,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001323291] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:10,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601282048] [2022-07-19 09:10:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:10,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:10,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:10,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:10:10,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 09:10:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:10,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 09:10:10,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 09:10:10,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:10:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 09:10:10,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601282048] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:10:10,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:10:10,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 09:10:10,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352110855] [2022-07-19 09:10:10,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:10:10,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 09:10:10,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:10,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 09:10:10,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 09:10:10,388 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:10,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:10,493 INFO L93 Difference]: Finished difference Result 77 states and 114 transitions. [2022-07-19 09:10:10,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 09:10:10,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-19 09:10:10,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:10,498 INFO L225 Difference]: With dead ends: 77 [2022-07-19 09:10:10,499 INFO L226 Difference]: Without dead ends: 59 [2022-07-19 09:10:10,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 09:10:10,501 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 149 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:10,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 38 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:10:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-19 09:10:10,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-19 09:10:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2022-07-19 09:10:10,522 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 22 [2022-07-19 09:10:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:10,523 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2022-07-19 09:10:10,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2022-07-19 09:10:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-19 09:10:10,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:10,525 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:10,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 09:10:10,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:10,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1687151938, now seen corresponding path program 2 times [2022-07-19 09:10:10,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:10,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970808933] [2022-07-19 09:10:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:10,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 09:10:10,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:10,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970808933] [2022-07-19 09:10:10,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970808933] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:10:10,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:10:10,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 09:10:10,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288741437] [2022-07-19 09:10:10,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:10:10,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 09:10:10,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:10,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 09:10:10,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:10:10,894 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:10,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:10,964 INFO L93 Difference]: Finished difference Result 111 states and 162 transitions. [2022-07-19 09:10:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 09:10:10,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-19 09:10:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:10,966 INFO L225 Difference]: With dead ends: 111 [2022-07-19 09:10:10,966 INFO L226 Difference]: Without dead ends: 83 [2022-07-19 09:10:10,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 09:10:10,967 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:10,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:10:10,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-19 09:10:10,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2022-07-19 09:10:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.364864864864865) internal successors, (101), 74 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2022-07-19 09:10:10,972 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 58 [2022-07-19 09:10:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:10,973 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2022-07-19 09:10:10,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2022-07-19 09:10:10,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-19 09:10:10,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:10,974 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:10,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 09:10:10,975 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:10,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1354664638, now seen corresponding path program 1 times [2022-07-19 09:10:10,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:10,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730843970] [2022-07-19 09:10:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:10,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 09:10:11,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:11,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730843970] [2022-07-19 09:10:11,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730843970] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:11,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195335069] [2022-07-19 09:10:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:11,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:11,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:11,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:10:11,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 09:10:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:11,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 09:10:11,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 09:10:11,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:10:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 09:10:11,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195335069] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:10:11,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:10:11,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-19 09:10:11,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078838967] [2022-07-19 09:10:11,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:10:11,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 09:10:11,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:11,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 09:10:11,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:10:11,323 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:11,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:11,462 INFO L93 Difference]: Finished difference Result 235 states and 340 transitions. [2022-07-19 09:10:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 09:10:11,463 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-19 09:10:11,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:11,464 INFO L225 Difference]: With dead ends: 235 [2022-07-19 09:10:11,464 INFO L226 Difference]: Without dead ends: 171 [2022-07-19 09:10:11,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:10:11,465 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 249 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:11,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 88 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:10:11,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-19 09:10:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-07-19 09:10:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.3705882352941177) internal successors, (233), 170 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 233 transitions. [2022-07-19 09:10:11,476 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 233 transitions. Word has length 58 [2022-07-19 09:10:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:11,476 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 233 transitions. [2022-07-19 09:10:11,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:11,477 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 233 transitions. [2022-07-19 09:10:11,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-19 09:10:11,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:11,479 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:11,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 09:10:11,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 09:10:11,710 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:11,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1703650066, now seen corresponding path program 2 times [2022-07-19 09:10:11,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:11,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059372224] [2022-07-19 09:10:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:11,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-07-19 09:10:11,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:11,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059372224] [2022-07-19 09:10:11,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059372224] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:11,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090516305] [2022-07-19 09:10:11,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:10:11,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:11,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:11,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:10:11,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 09:10:12,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:10:12,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:10:12,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 09:10:12,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-07-19 09:10:12,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:10:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-07-19 09:10:12,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090516305] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:10:12,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:10:12,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-19 09:10:12,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189997378] [2022-07-19 09:10:12,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:10:12,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 09:10:12,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:12,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 09:10:12,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:10:12,303 INFO L87 Difference]: Start difference. First operand 171 states and 233 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:12,574 INFO L93 Difference]: Finished difference Result 511 states and 742 transitions. [2022-07-19 09:10:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 09:10:12,574 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-07-19 09:10:12,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:12,577 INFO L225 Difference]: With dead ends: 511 [2022-07-19 09:10:12,578 INFO L226 Difference]: Without dead ends: 363 [2022-07-19 09:10:12,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:10:12,582 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 917 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:12,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 152 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:10:12,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-19 09:10:12,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2022-07-19 09:10:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.37292817679558) internal successors, (497), 362 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 497 transitions. [2022-07-19 09:10:12,610 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 497 transitions. Word has length 130 [2022-07-19 09:10:12,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:12,611 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 497 transitions. [2022-07-19 09:10:12,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:12,611 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 497 transitions. [2022-07-19 09:10:12,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-07-19 09:10:12,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:12,615 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:12,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 09:10:12,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:12,838 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:12,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:12,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1176972730, now seen corresponding path program 3 times [2022-07-19 09:10:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:12,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221229433] [2022-07-19 09:10:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:12,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2022-07-19 09:10:13,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:13,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221229433] [2022-07-19 09:10:13,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221229433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:13,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156579690] [2022-07-19 09:10:13,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:10:13,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:13,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:13,240 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:10:13,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 09:10:13,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 09:10:13,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:10:13,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 09:10:13,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:13,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:10:14,289 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:10:14,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2022-07-19 09:10:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 85 proven. 127 refuted. 0 times theorem prover too weak. 2626 trivial. 0 not checked. [2022-07-19 09:10:14,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:10:15,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-07-19 09:10:15,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-07-19 09:10:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 64 proven. 148 refuted. 0 times theorem prover too weak. 2626 trivial. 0 not checked. [2022-07-19 09:10:15,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156579690] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:10:15,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:10:15,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 37 [2022-07-19 09:10:15,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682230783] [2022-07-19 09:10:15,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:10:15,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 09:10:15,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:15,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 09:10:15,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=818, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 09:10:15,259 INFO L87 Difference]: Start difference. First operand 363 states and 497 transitions. Second operand has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:15,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:15,477 INFO L93 Difference]: Finished difference Result 1134 states and 1475 transitions. [2022-07-19 09:10:15,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 09:10:15,478 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 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 274 [2022-07-19 09:10:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:15,481 INFO L225 Difference]: With dead ends: 1134 [2022-07-19 09:10:15,481 INFO L226 Difference]: Without dead ends: 818 [2022-07-19 09:10:15,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 536 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=607, Invalid=1033, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 09:10:15,483 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:15,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 153 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 121 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2022-07-19 09:10:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-07-19 09:10:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 549. [2022-07-19 09:10:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.3704379562043796) internal successors, (751), 548 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 751 transitions. [2022-07-19 09:10:15,517 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 751 transitions. Word has length 274 [2022-07-19 09:10:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:15,517 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 751 transitions. [2022-07-19 09:10:15,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 751 transitions. [2022-07-19 09:10:15,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-07-19 09:10:15,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:15,521 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:15,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 09:10:15,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:15,739 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:15,740 INFO L85 PathProgramCache]: Analyzing trace with hash -246984626, now seen corresponding path program 1 times [2022-07-19 09:10:15,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:15,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9697689] [2022-07-19 09:10:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:15,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2022-07-19 09:10:16,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:16,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9697689] [2022-07-19 09:10:16,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9697689] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:16,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154394103] [2022-07-19 09:10:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:16,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:16,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:16,105 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:10:16,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 09:10:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:16,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 09:10:16,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2022-07-19 09:10:16,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:10:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2022-07-19 09:10:17,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154394103] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:10:17,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:10:17,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2022-07-19 09:10:17,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250935195] [2022-07-19 09:10:17,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:10:17,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-19 09:10:17,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:17,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-19 09:10:17,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2022-07-19 09:10:17,098 INFO L87 Difference]: Start difference. First operand 549 states and 751 transitions. Second operand has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:18,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:18,103 INFO L93 Difference]: Finished difference Result 2129 states and 2949 transitions. [2022-07-19 09:10:18,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-19 09:10:18,104 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 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 280 [2022-07-19 09:10:18,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:18,108 INFO L225 Difference]: With dead ends: 2129 [2022-07-19 09:10:18,108 INFO L226 Difference]: Without dead ends: 1633 [2022-07-19 09:10:18,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2022-07-19 09:10:18,110 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2782 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2782 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:18,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2782 Valid, 344 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 09:10:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2022-07-19 09:10:18,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1263. [2022-07-19 09:10:18,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 1.3748019017432647) internal successors, (1735), 1262 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1735 transitions. [2022-07-19 09:10:18,136 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1735 transitions. Word has length 280 [2022-07-19 09:10:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:18,136 INFO L495 AbstractCegarLoop]: Abstraction has 1263 states and 1735 transitions. [2022-07-19 09:10:18,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1735 transitions. [2022-07-19 09:10:18,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2022-07-19 09:10:18,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:18,144 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:18,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 09:10:18,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:18,362 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:18,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1627801764, now seen corresponding path program 2 times [2022-07-19 09:10:18,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:18,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727415124] [2022-07-19 09:10:18,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:18,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16068 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2022-07-19 09:10:19,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:19,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727415124] [2022-07-19 09:10:19,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727415124] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:19,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171861529] [2022-07-19 09:10:19,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:10:19,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:19,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:19,477 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:10:19,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 09:10:19,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:10:19,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:10:19,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 1985 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-19 09:10:19,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16068 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2022-07-19 09:10:19,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:10:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16068 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2022-07-19 09:10:22,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171861529] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:10:22,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:10:22,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 109 [2022-07-19 09:10:22,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089236707] [2022-07-19 09:10:22,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:10:22,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-07-19 09:10:22,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:22,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-07-19 09:10:22,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2022-07-19 09:10:22,587 INFO L87 Difference]: Start difference. First operand 1263 states and 1735 transitions. Second operand has 109 states, 109 states have (on average 2.146788990825688) internal successors, (234), 109 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:28,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:10:28,063 INFO L93 Difference]: Finished difference Result 4373 states and 6072 transitions. [2022-07-19 09:10:28,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-07-19 09:10:28,064 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.146788990825688) internal successors, (234), 109 states have internal predecessors, (234), 0 states have call successors, (0), 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 634 [2022-07-19 09:10:28,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:10:28,073 INFO L225 Difference]: With dead ends: 4373 [2022-07-19 09:10:28,073 INFO L226 Difference]: Without dead ends: 3217 [2022-07-19 09:10:28,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1321 GetRequests, 1214 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2022-07-19 09:10:28,078 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7244 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 1258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7244 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1258 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:10:28,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7244 Valid, 658 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1258 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-19 09:10:28,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2022-07-19 09:10:28,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 2559. [2022-07-19 09:10:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 2558 states have (on average 1.3749022673964035) internal successors, (3517), 2558 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:28,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 3517 transitions. [2022-07-19 09:10:28,124 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 3517 transitions. Word has length 634 [2022-07-19 09:10:28,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:10:28,124 INFO L495 AbstractCegarLoop]: Abstraction has 2559 states and 3517 transitions. [2022-07-19 09:10:28,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.146788990825688) internal successors, (234), 109 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:10:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 3517 transitions. [2022-07-19 09:10:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1283 [2022-07-19 09:10:28,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:10:28,151 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:10:28,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 09:10:28,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:28,371 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:10:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:10:28,372 INFO L85 PathProgramCache]: Analyzing trace with hash 955499952, now seen corresponding path program 3 times [2022-07-19 09:10:28,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:10:28,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88421383] [2022-07-19 09:10:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:10:28,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:10:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:10:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 67098 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 55862 trivial. 0 not checked. [2022-07-19 09:10:31,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:10:31,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88421383] [2022-07-19 09:10:31,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88421383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:10:31,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284663999] [2022-07-19 09:10:31,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:10:31,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:10:31,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:10:31,696 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:10:31,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 09:10:31,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 09:10:31,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:10:31,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 09:10:32,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:10:32,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:10:32,158 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:10:32,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-07-19 09:10:35,970 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:10:35,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2022-07-19 09:10:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 67098 backedges. 523 proven. 1363 refuted. 0 times theorem prover too weak. 65212 trivial. 0 not checked. [2022-07-19 09:10:36,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:10:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 67098 backedges. 523 proven. 1363 refuted. 0 times theorem prover too weak. 65212 trivial. 0 not checked. [2022-07-19 09:10:40,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284663999] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:10:40,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:10:40,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 12, 12] total 124 [2022-07-19 09:10:40,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22194773] [2022-07-19 09:10:40,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:10:40,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-07-19 09:10:40,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:10:40,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-07-19 09:10:40,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6908, Invalid=8343, Unknown=1, NotChecked=0, Total=15252 [2022-07-19 09:10:40,726 INFO L87 Difference]: Start difference. First operand 2559 states and 3517 transitions. Second operand has 124 states, 124 states have (on average 2.2903225806451615) internal successors, (284), 124 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)