./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 791161d1 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-?-791161d [2022-07-22 09:22:42,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:22:42,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:22:42,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:22:42,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:22:42,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:22:42,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:22:42,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:22:42,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:22:42,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:22:42,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:22:42,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:22:42,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:22:42,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:22:42,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:22:42,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:22:42,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:22:42,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:22:42,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:22:42,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:22:42,677 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:22:42,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:22:42,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:22:42,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:22:42,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:22:42,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:22:42,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:22:42,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:22:42,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:22:42,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:22:42,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:22:42,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:22:42,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:22:42,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:22:42,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:22:42,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:22:42,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:22:42,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:22:42,690 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:22:42,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:22:42,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:22:42,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:22:42,693 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:22:42,718 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:22:42,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:22:42,719 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:22:42,719 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:22:42,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:22:42,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:22:42,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:22:42,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:22:42,721 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:22:42,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:22:42,722 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:22:42,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:22:42,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:22:42,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:22:42,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:22:42,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:22:42,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:22:42,723 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:22:42,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:22:42,723 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:22:42,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:22:42,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:22:42,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:22:42,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:22:42,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:22:42,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:22:42,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:22:42,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:22:42,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:22:42,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:22:42,726 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:22:42,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:22:42,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:22:42,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 [2022-07-22 09:22:42,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:22:42,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:22:42,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:22:42,936 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:22:42,937 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:22:42,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_running-2.i [2022-07-22 09:22:43,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d78912c6/d18538ccafed432cbe54d0b102611ec1/FLAG2dfdd92c8 [2022-07-22 09:22:43,423 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:22:43,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-2.i [2022-07-22 09:22:43,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d78912c6/d18538ccafed432cbe54d0b102611ec1/FLAG2dfdd92c8 [2022-07-22 09:22:43,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d78912c6/d18538ccafed432cbe54d0b102611ec1 [2022-07-22 09:22:43,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:22:43,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:22:43,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:22:43,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:22:43,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:22:43,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:22:43" (1/1) ... [2022-07-22 09:22:43,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@714503db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:22:43, skipping insertion in model container [2022-07-22 09:22:43,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:22:43" (1/1) ... [2022-07-22 09:22:43,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:22:43,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:22:43,584 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] [2022-07-22 09:22:43,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:22:43,606 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:22:43,617 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] [2022-07-22 09:22:43,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:22:43,639 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:22:43,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:22:43 WrapperNode [2022-07-22 09:22:43,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:22:43,641 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:22:43,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:22:43,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:22:43,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:22:43" (1/1) ... [2022-07-22 09:22:43,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:22:43" (1/1) ... [2022-07-22 09:22:43,669 INFO L137 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-07-22 09:22:43,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:22:43,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:22:43,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:22:43,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:22:43,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:22:43" (1/1) ... [2022-07-22 09:22:43,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:22:43" (1/1) ... [2022-07-22 09:22:43,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:22:43" (1/1) ... [2022-07-22 09:22:43,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:22:43" (1/1) ... [2022-07-22 09:22:43,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:22:43" (1/1) ... [2022-07-22 09:22:43,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:22:43" (1/1) ... [2022-07-22 09:22:43,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:22:43" (1/1) ... [2022-07-22 09:22:43,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:22:43,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:22:43,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:22:43,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:22:43,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:22:43" (1/1) ... [2022-07-22 09:22:43,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:22:43,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:22:43,769 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) [2022-07-22 09:22:43,780 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 [2022-07-22 09:22:43,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:22:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:22:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 09:22:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:22:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:22:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:22:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:22:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 09:22:43,853 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:22:43,855 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:22:43,992 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:22:43,996 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:22:44,002 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 09:22:44,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:22:44 BoogieIcfgContainer [2022-07-22 09:22:44,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:22:44,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:22:44,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:22:44,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:22:44,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:22:43" (1/3) ... [2022-07-22 09:22:44,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659b22b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:22:44, skipping insertion in model container [2022-07-22 09:22:44,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:22:43" (2/3) ... [2022-07-22 09:22:44,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659b22b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:22:44, skipping insertion in model container [2022-07-22 09:22:44,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:22:44" (3/3) ... [2022-07-22 09:22:44,023 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2022-07-22 09:22:44,032 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:22:44,034 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:22:44,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:22:44,076 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@36b815e7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@440dc978 [2022-07-22 09:22:44,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:22:44,084 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) [2022-07-22 09:22:44,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 09:22:44,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:22:44,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:22:44,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:22:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:22:44,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2030235279, now seen corresponding path program 1 times [2022-07-22 09:22:44,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:22:44,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495572827] [2022-07-22 09:22:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:22:44,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:22:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:22:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:22:44,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:22:44,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495572827] [2022-07-22 09:22:44,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495572827] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:22:44,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:22:44,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:22:44,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991756161] [2022-07-22 09:22:44,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:22:44,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:22:44,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:22:44,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:22:44,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:22:44,272 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) [2022-07-22 09:22:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:22:44,339 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2022-07-22 09:22:44,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:22:44,342 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 [2022-07-22 09:22:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:22:44,350 INFO L225 Difference]: With dead ends: 56 [2022-07-22 09:22:44,350 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 09:22:44,353 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 [2022-07-22 09:22:44,356 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 [2022-07-22 09:22:44,357 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] [2022-07-22 09:22:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 09:22:44,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-07-22 09:22:44,380 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) [2022-07-22 09:22:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-07-22 09:22:44,381 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2022-07-22 09:22:44,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:22:44,382 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-07-22 09:22:44,382 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) [2022-07-22 09:22:44,383 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-07-22 09:22:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-22 09:22:44,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:22:44,384 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] [2022-07-22 09:22:44,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:22:44,384 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:22:44,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:22:44,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1221461665, now seen corresponding path program 1 times [2022-07-22 09:22:44,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:22:44,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046360042] [2022-07-22 09:22:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:22:44,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:22:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:22:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:22:44,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:22:44,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046360042] [2022-07-22 09:22:44,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046360042] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:22:44,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921090991] [2022-07-22 09:22:44,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:22:44,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:22:44,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:22:44,456 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) [2022-07-22 09:22:44,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:22:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:22:44,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 09:22:44,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:22:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:22:44,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:22:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:22:44,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921090991] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:22:44,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:22:44,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 09:22:44,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403031320] [2022-07-22 09:22:44,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:22:44,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 09:22:44,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:22:44,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 09:22:44,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:22:44,638 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) [2022-07-22 09:22:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:22:44,734 INFO L93 Difference]: Finished difference Result 77 states and 114 transitions. [2022-07-22 09:22:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 09:22:44,735 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 [2022-07-22 09:22:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:22:44,738 INFO L225 Difference]: With dead ends: 77 [2022-07-22 09:22:44,739 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 09:22:44,739 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 [2022-07-22 09:22:44,741 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 [2022-07-22 09:22:44,741 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] [2022-07-22 09:22:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 09:22:44,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-22 09:22:44,754 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) [2022-07-22 09:22:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2022-07-22 09:22:44,759 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 22 [2022-07-22 09:22:44,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:22:44,759 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2022-07-22 09:22:44,759 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) [2022-07-22 09:22:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2022-07-22 09:22:44,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 09:22:44,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:22:44,760 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] [2022-07-22 09:22:44,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 09:22:44,975 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 [2022-07-22 09:22:44,976 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:22:44,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:22:44,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1687151938, now seen corresponding path program 2 times [2022-07-22 09:22:44,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:22:44,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711364505] [2022-07-22 09:22:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:22:44,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:22:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:22:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-22 09:22:45,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:22:45,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711364505] [2022-07-22 09:22:45,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711364505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:22:45,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:22:45,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 09:22:45,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252452820] [2022-07-22 09:22:45,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:22:45,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 09:22:45,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:22:45,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 09:22:45,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:22:45,108 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) [2022-07-22 09:22:45,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:22:45,169 INFO L93 Difference]: Finished difference Result 111 states and 162 transitions. [2022-07-22 09:22:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 09:22:45,169 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 [2022-07-22 09:22:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:22:45,172 INFO L225 Difference]: With dead ends: 111 [2022-07-22 09:22:45,172 INFO L226 Difference]: Without dead ends: 83 [2022-07-22 09:22:45,173 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 [2022-07-22 09:22:45,174 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:22:45,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:22:45,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-22 09:22:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2022-07-22 09:22:45,215 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) [2022-07-22 09:22:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2022-07-22 09:22:45,219 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 58 [2022-07-22 09:22:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:22:45,224 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2022-07-22 09:22:45,224 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) [2022-07-22 09:22:45,224 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2022-07-22 09:22:45,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 09:22:45,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:22:45,232 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] [2022-07-22 09:22:45,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 09:22:45,233 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:22:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:22:45,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1354664638, now seen corresponding path program 1 times [2022-07-22 09:22:45,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:22:45,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304621885] [2022-07-22 09:22:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:22:45,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:22:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:22:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-22 09:22:45,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:22:45,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304621885] [2022-07-22 09:22:45,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304621885] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:22:45,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823761035] [2022-07-22 09:22:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:22:45,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:22:45,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:22:45,313 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) [2022-07-22 09:22:45,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:22:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:22:45,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 09:22:45,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:22:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-22 09:22:45,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:22:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-22 09:22:45,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823761035] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:22:45,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:22:45,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-22 09:22:45,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173950382] [2022-07-22 09:22:45,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:22:45,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 09:22:45,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:22:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 09:22:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:22:45,454 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) [2022-07-22 09:22:45,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:22:45,603 INFO L93 Difference]: Finished difference Result 235 states and 340 transitions. [2022-07-22 09:22:45,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 09:22:45,604 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 [2022-07-22 09:22:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:22:45,605 INFO L225 Difference]: With dead ends: 235 [2022-07-22 09:22:45,605 INFO L226 Difference]: Without dead ends: 171 [2022-07-22 09:22:45,605 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 [2022-07-22 09:22:45,606 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 [2022-07-22 09:22:45,606 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] [2022-07-22 09:22:45,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-22 09:22:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-07-22 09:22:45,614 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) [2022-07-22 09:22:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 233 transitions. [2022-07-22 09:22:45,615 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 233 transitions. Word has length 58 [2022-07-22 09:22:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:22:45,615 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 233 transitions. [2022-07-22 09:22:45,616 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) [2022-07-22 09:22:45,616 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 233 transitions. [2022-07-22 09:22:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-22 09:22:45,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:22:45,617 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] [2022-07-22 09:22:45,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 09:22:45,838 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 [2022-07-22 09:22:45,839 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:22:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:22:45,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1703650066, now seen corresponding path program 2 times [2022-07-22 09:22:45,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:22:45,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439193343] [2022-07-22 09:22:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:22:45,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:22:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:22:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-07-22 09:22:46,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:22:46,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439193343] [2022-07-22 09:22:46,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439193343] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:22:46,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750949116] [2022-07-22 09:22:46,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:22:46,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:22:46,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:22:46,040 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) [2022-07-22 09:22:46,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:22:46,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:22:46,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:22:46,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 09:22:46,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:22:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-07-22 09:22:46,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:22:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-07-22 09:22:46,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750949116] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:22:46,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:22:46,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-22 09:22:46,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133588659] [2022-07-22 09:22:46,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:22:46,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 09:22:46,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:22:46,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 09:22:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-22 09:22:46,356 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) [2022-07-22 09:22:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:22:46,638 INFO L93 Difference]: Finished difference Result 511 states and 742 transitions. [2022-07-22 09:22:46,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 09:22:46,639 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 [2022-07-22 09:22:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:22:46,640 INFO L225 Difference]: With dead ends: 511 [2022-07-22 09:22:46,640 INFO L226 Difference]: Without dead ends: 363 [2022-07-22 09:22:46,641 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 [2022-07-22 09:22:46,642 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 [2022-07-22 09:22:46,642 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] [2022-07-22 09:22:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-22 09:22:46,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2022-07-22 09:22:46,653 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) [2022-07-22 09:22:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 497 transitions. [2022-07-22 09:22:46,654 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 497 transitions. Word has length 130 [2022-07-22 09:22:46,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:22:46,654 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 497 transitions. [2022-07-22 09:22:46,655 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) [2022-07-22 09:22:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 497 transitions. [2022-07-22 09:22:46,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-07-22 09:22:46,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:22:46,658 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] [2022-07-22 09:22:46,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 09:22:46,875 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 [2022-07-22 09:22:46,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:22:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:22:46,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1176972730, now seen corresponding path program 3 times [2022-07-22 09:22:46,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:22:46,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721184064] [2022-07-22 09:22:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:22:46,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:22:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:22:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2022-07-22 09:22:47,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:22:47,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721184064] [2022-07-22 09:22:47,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721184064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:22:47,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222074804] [2022-07-22 09:22:47,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:22:47,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:22:47,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:22:47,368 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) [2022-07-22 09:22:47,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:22:47,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 09:22:47,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:22:47,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 09:22:47,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:22:47,598 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 [2022-07-22 09:22:48,632 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:22:48,633 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 [2022-07-22 09:22:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 85 proven. 127 refuted. 0 times theorem prover too weak. 2626 trivial. 0 not checked. [2022-07-22 09:22:48,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:22:49,657 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 [2022-07-22 09:22:49,660 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 [2022-07-22 09:22:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 64 proven. 148 refuted. 0 times theorem prover too weak. 2626 trivial. 0 not checked. [2022-07-22 09:22:49,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222074804] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:22:49,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:22:49,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 37 [2022-07-22 09:22:49,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821175267] [2022-07-22 09:22:49,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:22:49,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-22 09:22:49,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:22:49,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-22 09:22:49,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=818, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 09:22:49,696 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) [2022-07-22 09:22:49,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:22:49,869 INFO L93 Difference]: Finished difference Result 1134 states and 1475 transitions. [2022-07-22 09:22:49,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 09:22:49,870 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 [2022-07-22 09:22:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:22:49,874 INFO L225 Difference]: With dead ends: 1134 [2022-07-22 09:22:49,874 INFO L226 Difference]: Without dead ends: 818 [2022-07-22 09:22:49,877 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 [2022-07-22 09:22:49,878 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 [2022-07-22 09:22:49,878 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] [2022-07-22 09:22:49,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-07-22 09:22:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 549. [2022-07-22 09:22:49,902 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) [2022-07-22 09:22:49,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 751 transitions. [2022-07-22 09:22:49,904 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 751 transitions. Word has length 274 [2022-07-22 09:22:49,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:22:49,905 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 751 transitions. [2022-07-22 09:22:49,905 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) [2022-07-22 09:22:49,905 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 751 transitions. [2022-07-22 09:22:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-07-22 09:22:49,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:22:49,910 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] [2022-07-22 09:22:49,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 09:22:50,128 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 [2022-07-22 09:22:50,128 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:22:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:22:50,129 INFO L85 PathProgramCache]: Analyzing trace with hash -246984626, now seen corresponding path program 1 times [2022-07-22 09:22:50,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:22:50,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305231292] [2022-07-22 09:22:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:22:50,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:22:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:22:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2022-07-22 09:22:50,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:22:50,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305231292] [2022-07-22 09:22:50,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305231292] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:22:50,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701149969] [2022-07-22 09:22:50,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:22:50,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:22:50,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:22:50,493 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) [2022-07-22 09:22:50,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:22:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:22:50,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 09:22:50,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:22:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2022-07-22 09:22:50,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:22:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2022-07-22 09:22:51,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701149969] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:22:51,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:22:51,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2022-07-22 09:22:51,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097660093] [2022-07-22 09:22:51,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:22:51,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-22 09:22:51,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:22:51,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-22 09:22:51,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2022-07-22 09:22:51,335 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) [2022-07-22 09:22:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:22:52,366 INFO L93 Difference]: Finished difference Result 2129 states and 2949 transitions. [2022-07-22 09:22:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-22 09:22:52,367 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 [2022-07-22 09:22:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:22:52,373 INFO L225 Difference]: With dead ends: 2129 [2022-07-22 09:22:52,373 INFO L226 Difference]: Without dead ends: 1633 [2022-07-22 09:22:52,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2022-07-22 09:22:52,387 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 [2022-07-22 09:22:52,388 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] [2022-07-22 09:22:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2022-07-22 09:22:52,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1263. [2022-07-22 09:22:52,424 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) [2022-07-22 09:22:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1735 transitions. [2022-07-22 09:22:52,426 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1735 transitions. Word has length 280 [2022-07-22 09:22:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:22:52,427 INFO L495 AbstractCegarLoop]: Abstraction has 1263 states and 1735 transitions. [2022-07-22 09:22:52,427 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) [2022-07-22 09:22:52,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1735 transitions. [2022-07-22 09:22:52,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2022-07-22 09:22:52,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:22:52,434 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] [2022-07-22 09:22:52,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 09:22:52,647 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 [2022-07-22 09:22:52,648 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:22:52,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:22:52,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1627801764, now seen corresponding path program 2 times [2022-07-22 09:22:52,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:22:52,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153219121] [2022-07-22 09:22:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:22:52,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:22:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:22:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16068 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2022-07-22 09:22:53,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:22:53,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153219121] [2022-07-22 09:22:53,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153219121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:22:53,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857825274] [2022-07-22 09:22:53,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:22:53,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:22:53,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:22:53,973 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) [2022-07-22 09:22:53,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 09:22:54,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:22:54,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:22:54,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 1985 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-22 09:22:54,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:22:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16068 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2022-07-22 09:22:54,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:22:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16068 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2022-07-22 09:22:57,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857825274] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:22:57,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:22:57,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 109 [2022-07-22 09:22:57,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804346201] [2022-07-22 09:22:57,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:22:57,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-07-22 09:22:57,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:22:57,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-07-22 09:22:57,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2022-07-22 09:22:57,244 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) [2022-07-22 09:23:03,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:23:03,145 INFO L93 Difference]: Finished difference Result 4373 states and 6072 transitions. [2022-07-22 09:23:03,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-07-22 09:23:03,146 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 [2022-07-22 09:23:03,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:23:03,155 INFO L225 Difference]: With dead ends: 4373 [2022-07-22 09:23:03,155 INFO L226 Difference]: Without dead ends: 3217 [2022-07-22 09:23:03,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1321 GetRequests, 1214 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2022-07-22 09:23:03,159 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7244 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 1258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:23:03,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7244 Valid, 658 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1258 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 09:23:03,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2022-07-22 09:23:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 2559. [2022-07-22 09:23:03,203 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) [2022-07-22 09:23:03,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 3517 transitions. [2022-07-22 09:23:03,207 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 3517 transitions. Word has length 634 [2022-07-22 09:23:03,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:23:03,209 INFO L495 AbstractCegarLoop]: Abstraction has 2559 states and 3517 transitions. [2022-07-22 09:23:03,209 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) [2022-07-22 09:23:03,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 3517 transitions. [2022-07-22 09:23:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1283 [2022-07-22 09:23:03,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:23:03,246 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] [2022-07-22 09:23:03,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 09:23:03,459 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 [2022-07-22 09:23:03,459 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:23:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:23:03,460 INFO L85 PathProgramCache]: Analyzing trace with hash 955499952, now seen corresponding path program 3 times [2022-07-22 09:23:03,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:23:03,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101457298] [2022-07-22 09:23:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:23:03,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:23:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:23:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 67098 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 55862 trivial. 0 not checked. [2022-07-22 09:23:07,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:23:07,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101457298] [2022-07-22 09:23:07,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101457298] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:23:07,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847712810] [2022-07-22 09:23:07,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:23:07,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:23:07,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:23:07,256 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) [2022-07-22 09:23:07,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 09:23:07,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 09:23:07,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:23:07,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 09:23:07,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:23:07,554 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 [2022-07-22 09:23:07,698 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-22 09:23:07,698 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 [2022-07-22 09:23:11,796 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:23:11,796 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 [2022-07-22 09:23:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 67098 backedges. 523 proven. 1363 refuted. 0 times theorem prover too weak. 65212 trivial. 0 not checked. [2022-07-22 09:23:12,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:23:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 67098 backedges. 523 proven. 1363 refuted. 0 times theorem prover too weak. 65212 trivial. 0 not checked. [2022-07-22 09:23:17,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847712810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:23:17,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:23:17,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 12, 12] total 124 [2022-07-22 09:23:17,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157930657] [2022-07-22 09:23:17,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:23:17,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-07-22 09:23:17,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:23:17,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-07-22 09:23:17,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6908, Invalid=8343, Unknown=1, NotChecked=0, Total=15252 [2022-07-22 09:23:17,257 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)