./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 06:07:21,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 06:07:21,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 06:07:21,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 06:07:21,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 06:07:21,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 06:07:21,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 06:07:21,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 06:07:21,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 06:07:21,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 06:07:21,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 06:07:21,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 06:07:21,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 06:07:21,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 06:07:21,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 06:07:21,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 06:07:21,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 06:07:21,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 06:07:21,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 06:07:21,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 06:07:21,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 06:07:21,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 06:07:21,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 06:07:21,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 06:07:21,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 06:07:21,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 06:07:21,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 06:07:21,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 06:07:21,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 06:07:21,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 06:07:21,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 06:07:21,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 06:07:21,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 06:07:21,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 06:07:21,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 06:07:21,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 06:07:21,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 06:07:21,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 06:07:21,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 06:07:21,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 06:07:21,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 06:07:21,842 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 06:07:21,876 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 06:07:21,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 06:07:21,878 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 06:07:21,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 06:07:21,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 06:07:21,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 06:07:21,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 06:07:21,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 06:07:21,880 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 06:07:21,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 06:07:21,881 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 06:07:21,881 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 06:07:21,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 06:07:21,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 06:07:21,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 06:07:21,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 06:07:21,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 06:07:21,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 06:07:21,883 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 06:07:21,883 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 06:07:21,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 06:07:21,883 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 06:07:21,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 06:07:21,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 06:07:21,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 06:07:21,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 06:07:21,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:07:21,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 06:07:21,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 06:07:21,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 06:07:21,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 06:07:21,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 06:07:21,886 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 06:07:21,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 06:07:21,886 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 06:07:21,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 06:07:21,887 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 06:07:21,887 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 06:07:22,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 06:07:22,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 06:07:22,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 06:07:22,190 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 06:07:22,191 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 06:07:22,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i [2023-09-01 06:07:23,387 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 06:07:23,665 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 06:07:23,665 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i [2023-09-01 06:07:23,683 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6e0ea8ec/44027b6a92c34e2a9b357b002749f3cf/FLAGd2ce93ea8 [2023-09-01 06:07:23,695 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6e0ea8ec/44027b6a92c34e2a9b357b002749f3cf [2023-09-01 06:07:23,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 06:07:23,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 06:07:23,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 06:07:23,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 06:07:23,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 06:07:23,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:07:23" (1/1) ... [2023-09-01 06:07:23,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb9c2ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:07:23, skipping insertion in model container [2023-09-01 06:07:23,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:07:23" (1/1) ... [2023-09-01 06:07:23,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 06:07:23,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 06:07:23,896 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-09-01 06:07:24,156 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[39095,39108] [2023-09-01 06:07:24,158 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[39180,39193] [2023-09-01 06:07:24,160 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[39232,39245] [2023-09-01 06:07:24,235 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49388,49401] [2023-09-01 06:07:24,237 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49437,49450] [2023-09-01 06:07:24,240 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49565,49578] [2023-09-01 06:07:24,240 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49623,49636] [2023-09-01 06:07:24,249 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:07:24,260 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 06:07:24,283 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-09-01 06:07:24,312 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[39095,39108] [2023-09-01 06:07:24,313 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[39180,39193] [2023-09-01 06:07:24,313 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[39232,39245] [2023-09-01 06:07:24,329 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49388,49401] [2023-09-01 06:07:24,329 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49437,49450] [2023-09-01 06:07:24,330 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49565,49578] [2023-09-01 06:07:24,331 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49623,49636] [2023-09-01 06:07:24,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:07:24,408 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 06:07:24,415 INFO L208 MainTranslator]: Completed translation [2023-09-01 06:07:24,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:07:24 WrapperNode [2023-09-01 06:07:24,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 06:07:24,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 06:07:24,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 06:07:24,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 06:07:24,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:07:24" (1/1) ... [2023-09-01 06:07:24,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:07:24" (1/1) ... [2023-09-01 06:07:24,498 INFO L138 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 229 [2023-09-01 06:07:24,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 06:07:24,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 06:07:24,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 06:07:24,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 06:07:24,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:07:24" (1/1) ... [2023-09-01 06:07:24,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:07:24" (1/1) ... [2023-09-01 06:07:24,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:07:24" (1/1) ... [2023-09-01 06:07:24,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:07:24" (1/1) ... [2023-09-01 06:07:24,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:07:24" (1/1) ... [2023-09-01 06:07:24,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:07:24" (1/1) ... [2023-09-01 06:07:24,554 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:07:24" (1/1) ... [2023-09-01 06:07:24,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:07:24" (1/1) ... [2023-09-01 06:07:24,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 06:07:24,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 06:07:24,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 06:07:24,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 06:07:24,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:07:24" (1/1) ... [2023-09-01 06:07:24,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:07:24,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:07:24,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 06:07:24,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 06:07:24,634 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2023-09-01 06:07:24,634 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2023-09-01 06:07:24,635 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2023-09-01 06:07:24,635 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2023-09-01 06:07:24,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 06:07:24,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 06:07:24,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 06:07:24,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 06:07:24,636 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 06:07:24,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 06:07:24,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 06:07:24,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 06:07:24,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 06:07:24,638 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 06:07:24,824 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 06:07:24,826 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 06:07:25,182 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 06:07:25,190 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 06:07:25,191 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 06:07:25,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:07:25 BoogieIcfgContainer [2023-09-01 06:07:25,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 06:07:25,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 06:07:25,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 06:07:25,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 06:07:25,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 06:07:23" (1/3) ... [2023-09-01 06:07:25,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b58bd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:07:25, skipping insertion in model container [2023-09-01 06:07:25,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:07:24" (2/3) ... [2023-09-01 06:07:25,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b58bd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:07:25, skipping insertion in model container [2023-09-01 06:07:25,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:07:25" (3/3) ... [2023-09-01 06:07:25,200 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2023-09-01 06:07:25,208 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 06:07:25,216 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 06:07:25,216 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-09-01 06:07:25,217 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 06:07:25,347 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 06:07:25,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 265 transitions, 546 flow [2023-09-01 06:07:25,538 INFO L130 PetriNetUnfolder]: 17/263 cut-off events. [2023-09-01 06:07:25,538 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 06:07:25,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 263 events. 17/263 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 615 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 217. Up to 2 conditions per place. [2023-09-01 06:07:25,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 265 transitions, 546 flow [2023-09-01 06:07:25,565 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 253 transitions, 515 flow [2023-09-01 06:07:25,570 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:07:25,589 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 253 transitions, 515 flow [2023-09-01 06:07:25,596 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 253 transitions, 515 flow [2023-09-01 06:07:25,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 253 transitions, 515 flow [2023-09-01 06:07:25,667 INFO L130 PetriNetUnfolder]: 17/253 cut-off events. [2023-09-01 06:07:25,667 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 06:07:25,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 253 events. 17/253 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 582 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 217. Up to 2 conditions per place. [2023-09-01 06:07:25,685 INFO L119 LiptonReduction]: Number of co-enabled transitions 28952 [2023-09-01 06:07:31,425 INFO L134 LiptonReduction]: Checked pairs total: 48388 [2023-09-01 06:07:31,425 INFO L136 LiptonReduction]: Total number of compositions: 234 [2023-09-01 06:07:31,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 06:07:31,443 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@53f31ad8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:07:31,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2023-09-01 06:07:31,447 INFO L130 PetriNetUnfolder]: 0/10 cut-off events. [2023-09-01 06:07:31,447 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:07:31,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:07:31,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 06:07:31,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting writer_fnErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:07:31,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:07:31,453 INFO L85 PathProgramCache]: Analyzing trace with hash 96279436, now seen corresponding path program 1 times [2023-09-01 06:07:31,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:07:31,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472404506] [2023-09-01 06:07:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:07:31,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:07:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:07:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:07:31,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:07:31,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472404506] [2023-09-01 06:07:31,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472404506] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:07:31,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:07:31,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:07:31,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62589523] [2023-09-01 06:07:31,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:07:31,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:07:31,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:07:31,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:07:31,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:07:31,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 499 [2023-09-01 06:07:31,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:31,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:07:31,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 499 [2023-09-01 06:07:31,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:07:34,854 INFO L130 PetriNetUnfolder]: 23212/33537 cut-off events. [2023-09-01 06:07:34,855 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-09-01 06:07:34,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66720 conditions, 33537 events. 23212/33537 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 204301 event pairs, 15757 based on Foata normal form. 889/18719 useless extension candidates. Maximal degree in co-relation 66441. Up to 19383 conditions per place. [2023-09-01 06:07:35,124 INFO L137 encePairwiseOnDemand]: 486/499 looper letters, 115 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-09-01 06:07:35,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 126 transitions, 498 flow [2023-09-01 06:07:35,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:07:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:07:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 867 transitions. [2023-09-01 06:07:35,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791583166332666 [2023-09-01 06:07:35,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 867 transitions. [2023-09-01 06:07:35,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 867 transitions. [2023-09-01 06:07:35,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:07:35,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 867 transitions. [2023-09-01 06:07:35,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:35,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:35,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:35,174 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 167 flow. Second operand 3 states and 867 transitions. [2023-09-01 06:07:35,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 126 transitions, 498 flow [2023-09-01 06:07:35,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 126 transitions, 491 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 06:07:35,185 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 166 flow [2023-09-01 06:07:35,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2023-09-01 06:07:35,193 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -4 predicate places. [2023-09-01 06:07:35,193 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 166 flow [2023-09-01 06:07:35,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:35,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:07:35,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 06:07:35,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 06:07:35,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:07:35,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:07:35,208 INFO L85 PathProgramCache]: Analyzing trace with hash 96281074, now seen corresponding path program 1 times [2023-09-01 06:07:35,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:07:35,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940034264] [2023-09-01 06:07:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:07:35,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:07:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:07:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:07:35,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:07:35,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940034264] [2023-09-01 06:07:35,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940034264] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:07:35,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:07:35,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:07:35,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381806723] [2023-09-01 06:07:35,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:07:35,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:07:35,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:07:35,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:07:35,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:07:35,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 499 [2023-09-01 06:07:35,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:35,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:07:35,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 499 [2023-09-01 06:07:35,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:07:39,416 INFO L130 PetriNetUnfolder]: 39262/56858 cut-off events. [2023-09-01 06:07:39,416 INFO L131 PetriNetUnfolder]: For 3538/3538 co-relation queries the response was YES. [2023-09-01 06:07:39,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117593 conditions, 56858 events. 39262/56858 cut-off events. For 3538/3538 co-relation queries the response was YES. Maximal size of possible extension queue 1323. Compared 369028 event pairs, 23467 based on Foata normal form. 0/31993 useless extension candidates. Maximal degree in co-relation 108364. Up to 33105 conditions per place. [2023-09-01 06:07:39,891 INFO L137 encePairwiseOnDemand]: 493/499 looper letters, 115 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-09-01 06:07:39,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 126 transitions, 522 flow [2023-09-01 06:07:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:07:39,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:07:39,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 848 transitions. [2023-09-01 06:07:39,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664662658650634 [2023-09-01 06:07:39,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 848 transitions. [2023-09-01 06:07:39,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 848 transitions. [2023-09-01 06:07:39,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:07:39,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 848 transitions. [2023-09-01 06:07:39,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 282.6666666666667) internal successors, (848), 3 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:39,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:39,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:39,902 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 166 flow. Second operand 3 states and 848 transitions. [2023-09-01 06:07:39,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 126 transitions, 522 flow [2023-09-01 06:07:39,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 126 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 06:07:39,910 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 182 flow [2023-09-01 06:07:39,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2023-09-01 06:07:39,912 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -2 predicate places. [2023-09-01 06:07:39,912 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 182 flow [2023-09-01 06:07:39,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:39,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:07:39,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:07:39,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 06:07:39,913 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting writer_fnErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:07:39,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:07:39,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1310303017, now seen corresponding path program 1 times [2023-09-01 06:07:39,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:07:39,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88984669] [2023-09-01 06:07:39,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:07:39,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:07:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:07:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:07:40,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:07:40,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88984669] [2023-09-01 06:07:40,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88984669] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:07:40,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:07:40,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 06:07:40,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273856164] [2023-09-01 06:07:40,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:07:40,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:07:40,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:07:40,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:07:40,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:07:40,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 499 [2023-09-01 06:07:40,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 236.0) internal successors, (1652), 7 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:40,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:07:40,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 499 [2023-09-01 06:07:40,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:07:44,592 INFO L130 PetriNetUnfolder]: 40108/58051 cut-off events. [2023-09-01 06:07:44,593 INFO L131 PetriNetUnfolder]: For 5283/5283 co-relation queries the response was YES. [2023-09-01 06:07:44,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124510 conditions, 58051 events. 40108/58051 cut-off events. For 5283/5283 co-relation queries the response was YES. Maximal size of possible extension queue 1399. Compared 395742 event pairs, 18038 based on Foata normal form. 0/33577 useless extension candidates. Maximal degree in co-relation 118912. Up to 55547 conditions per place. [2023-09-01 06:07:45,212 INFO L137 encePairwiseOnDemand]: 490/499 looper letters, 130 selfloop transitions, 12 changer transitions 0/151 dead transitions. [2023-09-01 06:07:45,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 151 transitions, 633 flow [2023-09-01 06:07:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:07:45,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:07:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1552 transitions. [2023-09-01 06:07:45,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518370073480294 [2023-09-01 06:07:45,216 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1552 transitions. [2023-09-01 06:07:45,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1552 transitions. [2023-09-01 06:07:45,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:07:45,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1552 transitions. [2023-09-01 06:07:45,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 258.6666666666667) internal successors, (1552), 6 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:45,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 499.0) internal successors, (3493), 7 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:45,229 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 499.0) internal successors, (3493), 7 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:45,229 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 182 flow. Second operand 6 states and 1552 transitions. [2023-09-01 06:07:45,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 151 transitions, 633 flow [2023-09-01 06:07:45,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 151 transitions, 628 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 06:07:45,237 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 261 flow [2023-09-01 06:07:45,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=261, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2023-09-01 06:07:45,238 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-09-01 06:07:45,238 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 261 flow [2023-09-01 06:07:45,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 236.0) internal successors, (1652), 7 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:45,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:07:45,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:07:45,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 06:07:45,240 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:07:45,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:07:45,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1310251576, now seen corresponding path program 1 times [2023-09-01 06:07:45,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:07:45,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99709721] [2023-09-01 06:07:45,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:07:45,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:07:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:07:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:07:45,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:07:45,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99709721] [2023-09-01 06:07:45,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99709721] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:07:45,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:07:45,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 06:07:45,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432364800] [2023-09-01 06:07:45,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:07:45,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 06:07:45,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:07:45,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 06:07:45,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 06:07:45,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 499 [2023-09-01 06:07:45,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 261 flow. Second operand has 6 states, 6 states have (on average 235.16666666666666) internal successors, (1411), 6 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:45,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:07:45,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 499 [2023-09-01 06:07:45,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:07:49,888 INFO L130 PetriNetUnfolder]: 39798/57678 cut-off events. [2023-09-01 06:07:49,888 INFO L131 PetriNetUnfolder]: For 10405/10405 co-relation queries the response was YES. [2023-09-01 06:07:50,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130903 conditions, 57678 events. 39798/57678 cut-off events. For 10405/10405 co-relation queries the response was YES. Maximal size of possible extension queue 1399. Compared 392019 event pairs, 19049 based on Foata normal form. 66/34596 useless extension candidates. Maximal degree in co-relation 113827. Up to 55513 conditions per place. [2023-09-01 06:07:50,237 INFO L137 encePairwiseOnDemand]: 491/499 looper letters, 117 selfloop transitions, 19 changer transitions 0/145 dead transitions. [2023-09-01 06:07:50,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 145 transitions, 699 flow [2023-09-01 06:07:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 06:07:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 06:07:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1297 transitions. [2023-09-01 06:07:50,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198396793587174 [2023-09-01 06:07:50,242 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1297 transitions. [2023-09-01 06:07:50,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1297 transitions. [2023-09-01 06:07:50,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:07:50,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1297 transitions. [2023-09-01 06:07:50,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 259.4) internal successors, (1297), 5 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:50,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 499.0) internal successors, (2994), 6 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:50,253 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 499.0) internal successors, (2994), 6 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:50,253 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 261 flow. Second operand 5 states and 1297 transitions. [2023-09-01 06:07:50,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 145 transitions, 699 flow [2023-09-01 06:07:50,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 699 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:07:50,263 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 374 flow [2023-09-01 06:07:50,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=374, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2023-09-01 06:07:50,264 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 13 predicate places. [2023-09-01 06:07:50,264 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 374 flow [2023-09-01 06:07:50,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 235.16666666666666) internal successors, (1411), 6 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:50,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:07:50,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:07:50,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 06:07:50,266 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting writer_fnErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:07:50,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:07:50,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1702892387, now seen corresponding path program 1 times [2023-09-01 06:07:50,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:07:50,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913664446] [2023-09-01 06:07:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:07:50,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:07:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:07:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:07:50,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:07:50,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913664446] [2023-09-01 06:07:50,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913664446] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:07:50,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:07:50,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 06:07:50,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286871641] [2023-09-01 06:07:50,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:07:50,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 06:07:50,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:07:50,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 06:07:50,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-09-01 06:07:51,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 499 [2023-09-01 06:07:51,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 374 flow. Second operand has 8 states, 8 states have (on average 226.375) internal successors, (1811), 8 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:51,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:07:51,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 499 [2023-09-01 06:07:51,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:07:59,057 INFO L130 PetriNetUnfolder]: 72048/104727 cut-off events. [2023-09-01 06:07:59,058 INFO L131 PetriNetUnfolder]: For 19651/19651 co-relation queries the response was YES. [2023-09-01 06:07:59,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246670 conditions, 104727 events. 72048/104727 cut-off events. For 19651/19651 co-relation queries the response was YES. Maximal size of possible extension queue 2510. Compared 782184 event pairs, 13273 based on Foata normal form. 0/63051 useless extension candidates. Maximal degree in co-relation 230719. Up to 26396 conditions per place. [2023-09-01 06:07:59,823 INFO L137 encePairwiseOnDemand]: 482/499 looper letters, 403 selfloop transitions, 36 changer transitions 0/448 dead transitions. [2023-09-01 06:07:59,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 448 transitions, 2273 flow [2023-09-01 06:07:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 06:07:59,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 06:07:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2422 transitions. [2023-09-01 06:07:59,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393008238699621 [2023-09-01 06:07:59,831 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2422 transitions. [2023-09-01 06:07:59,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2422 transitions. [2023-09-01 06:07:59,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:07:59,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2422 transitions. [2023-09-01 06:07:59,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 269.1111111111111) internal successors, (2422), 9 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:59,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:59,847 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:59,847 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 374 flow. Second operand 9 states and 2422 transitions. [2023-09-01 06:07:59,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 448 transitions, 2273 flow [2023-09-01 06:07:59,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 448 transitions, 2248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 06:07:59,883 INFO L231 Difference]: Finished difference. Result has 102 places, 127 transitions, 659 flow [2023-09-01 06:07:59,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=659, PETRI_PLACES=102, PETRI_TRANSITIONS=127} [2023-09-01 06:07:59,884 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 26 predicate places. [2023-09-01 06:07:59,884 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 127 transitions, 659 flow [2023-09-01 06:07:59,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 226.375) internal successors, (1811), 8 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:07:59,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:07:59,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:07:59,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 06:07:59,886 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting writer_fnErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:07:59,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:07:59,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1702892423, now seen corresponding path program 1 times [2023-09-01 06:07:59,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:07:59,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751215123] [2023-09-01 06:07:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:07:59,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:07:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:08:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:08:00,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:08:00,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751215123] [2023-09-01 06:08:00,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751215123] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:08:00,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:08:00,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 06:08:00,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254939078] [2023-09-01 06:08:00,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:08:00,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 06:08:00,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:08:00,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 06:08:00,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-09-01 06:08:00,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 499 [2023-09-01 06:08:00,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 127 transitions, 659 flow. Second operand has 8 states, 8 states have (on average 225.375) internal successors, (1803), 8 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:08:00,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:08:00,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 499 [2023-09-01 06:08:00,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:08:11,987 INFO L130 PetriNetUnfolder]: 95848/140568 cut-off events. [2023-09-01 06:08:11,988 INFO L131 PetriNetUnfolder]: For 119138/119138 co-relation queries the response was YES. [2023-09-01 06:08:12,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393803 conditions, 140568 events. 95848/140568 cut-off events. For 119138/119138 co-relation queries the response was YES. Maximal size of possible extension queue 3053. Compared 1076989 event pairs, 25378 based on Foata normal form. 582/91032 useless extension candidates. Maximal degree in co-relation 373397. Up to 49124 conditions per place. [2023-09-01 06:08:13,267 INFO L137 encePairwiseOnDemand]: 482/499 looper letters, 443 selfloop transitions, 60 changer transitions 0/512 dead transitions. [2023-09-01 06:08:13,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 512 transitions, 2961 flow [2023-09-01 06:08:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 06:08:13,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 06:08:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2672 transitions. [2023-09-01 06:08:13,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354709418837675 [2023-09-01 06:08:13,275 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2672 transitions. [2023-09-01 06:08:13,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2672 transitions. [2023-09-01 06:08:13,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:08:13,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2672 transitions. [2023-09-01 06:08:13,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 267.2) internal successors, (2672), 10 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:08:13,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 499.0) internal successors, (5489), 11 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:08:13,289 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 499.0) internal successors, (5489), 11 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:08:13,289 INFO L175 Difference]: Start difference. First operand has 102 places, 127 transitions, 659 flow. Second operand 10 states and 2672 transitions. [2023-09-01 06:08:13,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 512 transitions, 2961 flow [2023-09-01 06:08:14,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 512 transitions, 2940 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-09-01 06:08:14,766 INFO L231 Difference]: Finished difference. Result has 117 places, 158 transitions, 1127 flow [2023-09-01 06:08:14,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1127, PETRI_PLACES=117, PETRI_TRANSITIONS=158} [2023-09-01 06:08:14,767 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 41 predicate places. [2023-09-01 06:08:14,768 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 158 transitions, 1127 flow [2023-09-01 06:08:14,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 225.375) internal successors, (1803), 8 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:08:14,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:08:14,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:08:14,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 06:08:14,769 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:08:14,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:08:14,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1787440568, now seen corresponding path program 1 times [2023-09-01 06:08:14,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:08:14,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398745011] [2023-09-01 06:08:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:08:14,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:08:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:08:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:08:14,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:08:14,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398745011] [2023-09-01 06:08:14,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398745011] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:08:14,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:08:14,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 06:08:14,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560006874] [2023-09-01 06:08:14,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:08:14,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 06:08:14,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:08:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 06:08:14,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 06:08:15,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 499 [2023-09-01 06:08:15,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 158 transitions, 1127 flow. Second operand has 8 states, 8 states have (on average 223.375) internal successors, (1787), 8 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:08:15,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:08:15,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 499 [2023-09-01 06:08:15,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:08:41,392 INFO L130 PetriNetUnfolder]: 183636/270934 cut-off events. [2023-09-01 06:08:41,392 INFO L131 PetriNetUnfolder]: For 506612/506612 co-relation queries the response was YES. [2023-09-01 06:08:42,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853867 conditions, 270934 events. 183636/270934 cut-off events. For 506612/506612 co-relation queries the response was YES. Maximal size of possible extension queue 5332. Compared 2238372 event pairs, 38145 based on Foata normal form. 0/178368 useless extension candidates. Maximal degree in co-relation 816731. Up to 90327 conditions per place. [2023-09-01 06:08:43,882 INFO L137 encePairwiseOnDemand]: 483/499 looper letters, 774 selfloop transitions, 101 changer transitions 0/883 dead transitions. [2023-09-01 06:08:43,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 883 transitions, 7824 flow [2023-09-01 06:08:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 06:08:43,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 06:08:43,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2652 transitions. [2023-09-01 06:08:43,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314629258517034 [2023-09-01 06:08:43,888 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2652 transitions. [2023-09-01 06:08:43,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2652 transitions. [2023-09-01 06:08:43,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:08:43,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2652 transitions. [2023-09-01 06:08:43,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 265.2) internal successors, (2652), 10 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:08:43,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 499.0) internal successors, (5489), 11 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:08:43,902 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 499.0) internal successors, (5489), 11 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:08:43,902 INFO L175 Difference]: Start difference. First operand has 117 places, 158 transitions, 1127 flow. Second operand 10 states and 2652 transitions. [2023-09-01 06:08:43,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 883 transitions, 7824 flow [2023-09-01 06:08:46,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 883 transitions, 7722 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-09-01 06:08:46,066 INFO L231 Difference]: Finished difference. Result has 129 places, 281 transitions, 2578 flow [2023-09-01 06:08:46,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2578, PETRI_PLACES=129, PETRI_TRANSITIONS=281} [2023-09-01 06:08:46,067 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 53 predicate places. [2023-09-01 06:08:46,067 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 281 transitions, 2578 flow [2023-09-01 06:08:46,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 223.375) internal successors, (1787), 8 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:08:46,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:08:46,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:08:46,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 06:08:46,069 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:08:46,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:08:46,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1787440445, now seen corresponding path program 1 times [2023-09-01 06:08:46,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:08:46,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184115058] [2023-09-01 06:08:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:08:46,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:08:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:08:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:08:46,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:08:46,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184115058] [2023-09-01 06:08:46,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184115058] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:08:46,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:08:46,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 06:08:46,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774640588] [2023-09-01 06:08:46,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:08:46,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 06:08:46,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:08:46,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 06:08:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 06:08:46,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 499 [2023-09-01 06:08:46,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 281 transitions, 2578 flow. Second operand has 8 states, 8 states have (on average 223.375) internal successors, (1787), 8 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:08:46,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:08:46,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 499 [2023-09-01 06:08:46,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:09:23,322 INFO L130 PetriNetUnfolder]: 224115/331999 cut-off events. [2023-09-01 06:09:23,322 INFO L131 PetriNetUnfolder]: For 863247/863247 co-relation queries the response was YES. [2023-09-01 06:09:25,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1169147 conditions, 331999 events. 224115/331999 cut-off events. For 863247/863247 co-relation queries the response was YES. Maximal size of possible extension queue 6157. Compared 2790227 event pairs, 53858 based on Foata normal form. 5043/243068 useless extension candidates. Maximal degree in co-relation 1085802. Up to 79078 conditions per place. [2023-09-01 06:09:27,004 INFO L137 encePairwiseOnDemand]: 482/499 looper letters, 817 selfloop transitions, 119 changer transitions 0/944 dead transitions. [2023-09-01 06:09:27,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 944 transitions, 9246 flow [2023-09-01 06:09:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 06:09:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 06:09:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2652 transitions. [2023-09-01 06:09:27,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314629258517034 [2023-09-01 06:09:27,010 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2652 transitions. [2023-09-01 06:09:27,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2652 transitions. [2023-09-01 06:09:27,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:09:27,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2652 transitions. [2023-09-01 06:09:27,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 265.2) internal successors, (2652), 10 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:27,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 499.0) internal successors, (5489), 11 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:27,023 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 499.0) internal successors, (5489), 11 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:27,023 INFO L175 Difference]: Start difference. First operand has 129 places, 281 transitions, 2578 flow. Second operand 10 states and 2652 transitions. [2023-09-01 06:09:27,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 944 transitions, 9246 flow [2023-09-01 06:09:35,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 944 transitions, 9229 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:09:35,525 INFO L231 Difference]: Finished difference. Result has 143 places, 333 transitions, 3566 flow [2023-09-01 06:09:35,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3566, PETRI_PLACES=143, PETRI_TRANSITIONS=333} [2023-09-01 06:09:35,527 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 67 predicate places. [2023-09-01 06:09:35,527 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 333 transitions, 3566 flow [2023-09-01 06:09:35,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 223.375) internal successors, (1787), 8 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:35,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:09:35,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:09:35,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 06:09:35,528 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting writer_fnErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:09:35,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:09:35,528 INFO L85 PathProgramCache]: Analyzing trace with hash 83267088, now seen corresponding path program 1 times [2023-09-01 06:09:35,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:09:35,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245178947] [2023-09-01 06:09:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:09:35,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:09:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:09:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:09:35,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:09:35,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245178947] [2023-09-01 06:09:35,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245178947] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:09:35,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:09:35,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 06:09:35,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623004314] [2023-09-01 06:09:35,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:09:35,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:09:35,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:09:35,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:09:35,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:09:35,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 499 [2023-09-01 06:09:35,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 333 transitions, 3566 flow. Second operand has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:35,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:09:35,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 499 [2023-09-01 06:09:35,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:09:44,000 INFO L130 PetriNetUnfolder]: 40350/66506 cut-off events. [2023-09-01 06:09:44,000 INFO L131 PetriNetUnfolder]: For 225642/226208 co-relation queries the response was YES. [2023-09-01 06:09:44,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237600 conditions, 66506 events. 40350/66506 cut-off events. For 225642/226208 co-relation queries the response was YES. Maximal size of possible extension queue 1590. Compared 550226 event pairs, 7391 based on Foata normal form. 7933/56296 useless extension candidates. Maximal degree in co-relation 230473. Up to 54803 conditions per place. [2023-09-01 06:09:44,792 INFO L137 encePairwiseOnDemand]: 489/499 looper letters, 224 selfloop transitions, 28 changer transitions 0/264 dead transitions. [2023-09-01 06:09:44,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 264 transitions, 2734 flow [2023-09-01 06:09:44,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:09:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:09:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 833 transitions. [2023-09-01 06:09:44,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564462257849031 [2023-09-01 06:09:44,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 833 transitions. [2023-09-01 06:09:44,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 833 transitions. [2023-09-01 06:09:44,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:09:44,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 833 transitions. [2023-09-01 06:09:44,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.6666666666667) internal successors, (833), 3 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:44,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:44,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:44,798 INFO L175 Difference]: Start difference. First operand has 143 places, 333 transitions, 3566 flow. Second operand 3 states and 833 transitions. [2023-09-01 06:09:44,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 264 transitions, 2734 flow [2023-09-01 06:09:45,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 264 transitions, 2586 flow, removed 46 selfloop flow, removed 4 redundant places. [2023-09-01 06:09:45,908 INFO L231 Difference]: Finished difference. Result has 141 places, 224 transitions, 1906 flow [2023-09-01 06:09:45,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=1850, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1906, PETRI_PLACES=141, PETRI_TRANSITIONS=224} [2023-09-01 06:09:45,909 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 65 predicate places. [2023-09-01 06:09:45,910 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 224 transitions, 1906 flow [2023-09-01 06:09:45,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:45,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:09:45,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:09:45,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 06:09:45,911 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting writer_fnErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:09:45,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:09:45,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1284730054, now seen corresponding path program 1 times [2023-09-01 06:09:45,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:09:45,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101717028] [2023-09-01 06:09:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:09:45,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:09:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:09:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:09:45,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:09:45,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101717028] [2023-09-01 06:09:45,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101717028] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:09:45,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565222629] [2023-09-01 06:09:45,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:09:45,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:09:45,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:09:45,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:09:45,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 06:09:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:09:46,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:09:46,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:09:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:09:46,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 06:09:46,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565222629] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:09:46,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 06:09:46,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-09-01 06:09:46,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325728376] [2023-09-01 06:09:46,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:09:46,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 06:09:46,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:09:46,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 06:09:46,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 06:09:46,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 499 [2023-09-01 06:09:46,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 224 transitions, 1906 flow. Second operand has 4 states, 4 states have (on average 247.5) internal successors, (990), 4 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:46,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:09:46,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 499 [2023-09-01 06:09:46,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:09:52,971 INFO L130 PetriNetUnfolder]: 35944/58670 cut-off events. [2023-09-01 06:09:52,971 INFO L131 PetriNetUnfolder]: For 169356/170129 co-relation queries the response was YES. [2023-09-01 06:09:53,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210886 conditions, 58670 events. 35944/58670 cut-off events. For 169356/170129 co-relation queries the response was YES. Maximal size of possible extension queue 1395. Compared 461708 event pairs, 14150 based on Foata normal form. 1906/46949 useless extension candidates. Maximal degree in co-relation 195495. Up to 38074 conditions per place. [2023-09-01 06:09:53,699 INFO L137 encePairwiseOnDemand]: 495/499 looper letters, 366 selfloop transitions, 4 changer transitions 0/382 dead transitions. [2023-09-01 06:09:53,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 382 transitions, 3778 flow [2023-09-01 06:09:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 06:09:53,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 06:09:53,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1133 transitions. [2023-09-01 06:09:53,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5676352705410822 [2023-09-01 06:09:53,702 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1133 transitions. [2023-09-01 06:09:53,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1133 transitions. [2023-09-01 06:09:53,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:09:53,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1133 transitions. [2023-09-01 06:09:53,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.25) internal successors, (1133), 4 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:53,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 499.0) internal successors, (2495), 5 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:53,705 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 499.0) internal successors, (2495), 5 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:53,705 INFO L175 Difference]: Start difference. First operand has 141 places, 224 transitions, 1906 flow. Second operand 4 states and 1133 transitions. [2023-09-01 06:09:53,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 382 transitions, 3778 flow [2023-09-01 06:09:54,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 382 transitions, 3674 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 06:09:54,261 INFO L231 Difference]: Finished difference. Result has 139 places, 222 transitions, 1838 flow [2023-09-01 06:09:54,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1838, PETRI_PLACES=139, PETRI_TRANSITIONS=222} [2023-09-01 06:09:54,263 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 63 predicate places. [2023-09-01 06:09:54,263 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 222 transitions, 1838 flow [2023-09-01 06:09:54,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 247.5) internal successors, (990), 4 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:54,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:09:54,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:09:54,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 06:09:54,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 06:09:54,465 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:09:54,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:09:54,465 INFO L85 PathProgramCache]: Analyzing trace with hash 634637898, now seen corresponding path program 1 times [2023-09-01 06:09:54,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:09:54,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652897676] [2023-09-01 06:09:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:09:54,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:09:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:09:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:09:54,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:09:54,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652897676] [2023-09-01 06:09:54,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652897676] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:09:54,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138917554] [2023-09-01 06:09:54,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:09:54,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:09:54,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:09:54,515 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:09:54,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 06:09:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:09:54,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:09:54,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:09:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:09:54,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 06:09:54,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138917554] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:09:54,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 06:09:54,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-09-01 06:09:54,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627947401] [2023-09-01 06:09:54,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:09:54,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 06:09:54,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:09:54,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 06:09:54,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 06:09:54,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 499 [2023-09-01 06:09:54,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 222 transitions, 1838 flow. Second operand has 4 states, 4 states have (on average 246.25) internal successors, (985), 4 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:09:54,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:09:54,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 499 [2023-09-01 06:09:54,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:10:00,414 INFO L130 PetriNetUnfolder]: 32022/51823 cut-off events. [2023-09-01 06:10:00,414 INFO L131 PetriNetUnfolder]: For 142703/143580 co-relation queries the response was YES. [2023-09-01 06:10:00,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181784 conditions, 51823 events. 32022/51823 cut-off events. For 142703/143580 co-relation queries the response was YES. Maximal size of possible extension queue 1208. Compared 395674 event pairs, 11772 based on Foata normal form. 1732/41835 useless extension candidates. Maximal degree in co-relation 168469. Up to 32726 conditions per place. [2023-09-01 06:10:00,897 INFO L137 encePairwiseOnDemand]: 495/499 looper letters, 346 selfloop transitions, 4 changer transitions 0/362 dead transitions. [2023-09-01 06:10:00,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 362 transitions, 3499 flow [2023-09-01 06:10:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 06:10:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 06:10:00,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1121 transitions. [2023-09-01 06:10:00,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.561623246492986 [2023-09-01 06:10:00,899 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1121 transitions. [2023-09-01 06:10:00,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1121 transitions. [2023-09-01 06:10:00,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:10:00,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1121 transitions. [2023-09-01 06:10:00,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 280.25) internal successors, (1121), 4 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:00,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 499.0) internal successors, (2495), 5 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:00,902 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 499.0) internal successors, (2495), 5 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:00,903 INFO L175 Difference]: Start difference. First operand has 139 places, 222 transitions, 1838 flow. Second operand 4 states and 1121 transitions. [2023-09-01 06:10:00,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 362 transitions, 3499 flow [2023-09-01 06:10:01,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 362 transitions, 3483 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 06:10:01,347 INFO L231 Difference]: Finished difference. Result has 138 places, 220 transitions, 1830 flow [2023-09-01 06:10:01,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1830, PETRI_PLACES=138, PETRI_TRANSITIONS=220} [2023-09-01 06:10:01,348 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 62 predicate places. [2023-09-01 06:10:01,348 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 220 transitions, 1830 flow [2023-09-01 06:10:01,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 246.25) internal successors, (985), 4 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:01,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:10:01,348 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:10:01,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 06:10:01,549 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,SelfDestructingSolverStorable10 [2023-09-01 06:10:01,549 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting writer_fnErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:10:01,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:10:01,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1171924247, now seen corresponding path program 1 times [2023-09-01 06:10:01,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:10:01,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800570045] [2023-09-01 06:10:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:10:01,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:10:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:10:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:10:01,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:10:01,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800570045] [2023-09-01 06:10:01,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800570045] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:10:01,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499032078] [2023-09-01 06:10:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:10:01,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:10:01,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:10:01,933 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:10:01,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 06:10:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:10:02,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 06:10:02,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:10:02,149 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-09-01 06:10:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:10:02,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:10:02,263 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 24 [2023-09-01 06:10:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:10:02,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499032078] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:10:02,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:10:02,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2023-09-01 06:10:02,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590665599] [2023-09-01 06:10:02,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:10:02,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:10:02,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:10:02,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:10:02,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:10:03,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 499 [2023-09-01 06:10:03,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 220 transitions, 1830 flow. Second operand has 13 states, 13 states have (on average 241.6153846153846) internal successors, (3141), 13 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:03,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:10:03,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 499 [2023-09-01 06:10:03,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:10:09,503 INFO L130 PetriNetUnfolder]: 33557/54166 cut-off events. [2023-09-01 06:10:09,503 INFO L131 PetriNetUnfolder]: For 135748/136478 co-relation queries the response was YES. [2023-09-01 06:10:09,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189834 conditions, 54166 events. 33557/54166 cut-off events. For 135748/136478 co-relation queries the response was YES. Maximal size of possible extension queue 1257. Compared 420104 event pairs, 6135 based on Foata normal form. 808/42636 useless extension candidates. Maximal degree in co-relation 172043. Up to 34923 conditions per place. [2023-09-01 06:10:10,102 INFO L137 encePairwiseOnDemand]: 487/499 looper letters, 416 selfloop transitions, 61 changer transitions 0/489 dead transitions. [2023-09-01 06:10:10,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 489 transitions, 4449 flow [2023-09-01 06:10:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 06:10:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 06:10:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2143 transitions. [2023-09-01 06:10:10,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5368236472945892 [2023-09-01 06:10:10,106 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2143 transitions. [2023-09-01 06:10:10,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2143 transitions. [2023-09-01 06:10:10,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:10:10,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2143 transitions. [2023-09-01 06:10:10,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 267.875) internal successors, (2143), 8 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:10,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 499.0) internal successors, (4491), 9 states have internal predecessors, (4491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:10,113 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 499.0) internal successors, (4491), 9 states have internal predecessors, (4491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:10,113 INFO L175 Difference]: Start difference. First operand has 138 places, 220 transitions, 1830 flow. Second operand 8 states and 2143 transitions. [2023-09-01 06:10:10,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 489 transitions, 4449 flow [2023-09-01 06:10:10,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 489 transitions, 4427 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 06:10:10,734 INFO L231 Difference]: Finished difference. Result has 145 places, 238 transitions, 2261 flow [2023-09-01 06:10:10,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2261, PETRI_PLACES=145, PETRI_TRANSITIONS=238} [2023-09-01 06:10:10,735 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 69 predicate places. [2023-09-01 06:10:10,735 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 238 transitions, 2261 flow [2023-09-01 06:10:10,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 241.6153846153846) internal successors, (3141), 13 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:10,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:10:10,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:10:10,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 06:10:10,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:10:10,937 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:10:10,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:10:10,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1801059216, now seen corresponding path program 1 times [2023-09-01 06:10:10,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:10:10,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297798043] [2023-09-01 06:10:10,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:10:10,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:10:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:10:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:10:11,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:10:11,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297798043] [2023-09-01 06:10:11,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297798043] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:10:11,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19674073] [2023-09-01 06:10:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:10:11,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:10:11,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:10:11,251 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:10:11,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 06:10:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:10:11,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 06:10:11,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:10:11,433 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-09-01 06:10:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:10:11,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:10:11,676 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 24 [2023-09-01 06:10:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:10:11,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19674073] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:10:11,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:10:11,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-09-01 06:10:11,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354593087] [2023-09-01 06:10:11,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:10:11,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 06:10:11,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:10:11,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 06:10:11,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-09-01 06:10:12,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 499 [2023-09-01 06:10:12,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 238 transitions, 2261 flow. Second operand has 12 states, 12 states have (on average 240.66666666666666) internal successors, (2888), 12 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:12,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:10:12,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 499 [2023-09-01 06:10:12,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:10:18,789 INFO L130 PetriNetUnfolder]: 34466/55443 cut-off events. [2023-09-01 06:10:18,789 INFO L131 PetriNetUnfolder]: For 174924/175967 co-relation queries the response was YES. [2023-09-01 06:10:19,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200721 conditions, 55443 events. 34466/55443 cut-off events. For 174924/175967 co-relation queries the response was YES. Maximal size of possible extension queue 1242. Compared 426313 event pairs, 9747 based on Foata normal form. 1078/44269 useless extension candidates. Maximal degree in co-relation 169008. Up to 35964 conditions per place. [2023-09-01 06:10:19,577 INFO L137 encePairwiseOnDemand]: 489/499 looper letters, 390 selfloop transitions, 39 changer transitions 0/441 dead transitions. [2023-09-01 06:10:19,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 441 transitions, 4619 flow [2023-09-01 06:10:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:10:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:10:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1608 transitions. [2023-09-01 06:10:19,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370741482965932 [2023-09-01 06:10:19,580 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1608 transitions. [2023-09-01 06:10:19,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1608 transitions. [2023-09-01 06:10:19,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:10:19,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1608 transitions. [2023-09-01 06:10:19,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:19,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 499.0) internal successors, (3493), 7 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:19,585 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 499.0) internal successors, (3493), 7 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:19,585 INFO L175 Difference]: Start difference. First operand has 145 places, 238 transitions, 2261 flow. Second operand 6 states and 1608 transitions. [2023-09-01 06:10:19,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 441 transitions, 4619 flow [2023-09-01 06:10:20,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 441 transitions, 4575 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-09-01 06:10:20,076 INFO L231 Difference]: Finished difference. Result has 148 places, 244 transitions, 2487 flow [2023-09-01 06:10:20,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=2243, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2487, PETRI_PLACES=148, PETRI_TRANSITIONS=244} [2023-09-01 06:10:20,077 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 72 predicate places. [2023-09-01 06:10:20,077 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 244 transitions, 2487 flow [2023-09-01 06:10:20,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 240.66666666666666) internal successors, (2888), 12 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:20,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:10:20,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:10:20,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 06:10:20,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:10:20,279 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:10:20,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:10:20,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1801059253, now seen corresponding path program 1 times [2023-09-01 06:10:20,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:10:20,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431168739] [2023-09-01 06:10:20,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:10:20,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:10:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:10:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:10:20,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:10:20,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431168739] [2023-09-01 06:10:20,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431168739] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:10:20,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245934086] [2023-09-01 06:10:20,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:10:20,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:10:20,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:10:20,929 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:10:20,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 06:10:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:10:21,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 06:10:21,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:10:21,099 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-09-01 06:10:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:10:21,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:10:21,193 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 28 [2023-09-01 06:10:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:10:21,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245934086] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:10:21,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:10:21,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 15 [2023-09-01 06:10:21,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107827683] [2023-09-01 06:10:21,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:10:21,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 06:10:21,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:10:21,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 06:10:21,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-09-01 06:10:22,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 499 [2023-09-01 06:10:22,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 244 transitions, 2487 flow. Second operand has 16 states, 16 states have (on average 225.125) internal successors, (3602), 16 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:22,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:10:22,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 499 [2023-09-01 06:10:22,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:10:30,214 INFO L130 PetriNetUnfolder]: 39460/63208 cut-off events. [2023-09-01 06:10:30,214 INFO L131 PetriNetUnfolder]: For 210734/210734 co-relation queries the response was YES. [2023-09-01 06:10:30,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234931 conditions, 63208 events. 39460/63208 cut-off events. For 210734/210734 co-relation queries the response was YES. Maximal size of possible extension queue 1253. Compared 484427 event pairs, 7843 based on Foata normal form. 377/49632 useless extension candidates. Maximal degree in co-relation 213346. Up to 26060 conditions per place. [2023-09-01 06:10:30,944 INFO L137 encePairwiseOnDemand]: 483/499 looper letters, 612 selfloop transitions, 121 changer transitions 0/741 dead transitions. [2023-09-01 06:10:30,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 741 transitions, 7271 flow [2023-09-01 06:10:30,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 06:10:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 06:10:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4218 transitions. [2023-09-01 06:10:30,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722975362489685 [2023-09-01 06:10:30,951 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4218 transitions. [2023-09-01 06:10:30,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4218 transitions. [2023-09-01 06:10:30,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:10:30,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4218 transitions. [2023-09-01 06:10:30,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 248.11764705882354) internal successors, (4218), 17 states have internal predecessors, (4218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:30,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 499.0) internal successors, (8982), 18 states have internal predecessors, (8982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:30,964 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 499.0) internal successors, (8982), 18 states have internal predecessors, (8982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:30,964 INFO L175 Difference]: Start difference. First operand has 148 places, 244 transitions, 2487 flow. Second operand 17 states and 4218 transitions. [2023-09-01 06:10:30,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 741 transitions, 7271 flow [2023-09-01 06:10:31,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 741 transitions, 7146 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 06:10:31,930 INFO L231 Difference]: Finished difference. Result has 170 places, 306 transitions, 3721 flow [2023-09-01 06:10:31,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3721, PETRI_PLACES=170, PETRI_TRANSITIONS=306} [2023-09-01 06:10:31,932 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 94 predicate places. [2023-09-01 06:10:31,932 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 306 transitions, 3721 flow [2023-09-01 06:10:31,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 225.125) internal successors, (3602), 16 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:31,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:10:31,932 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:10:31,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 06:10:32,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 06:10:32,133 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting writer_fnErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:10:32,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:10:32,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1171924381, now seen corresponding path program 1 times [2023-09-01 06:10:32,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:10:32,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364719139] [2023-09-01 06:10:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:10:32,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:10:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:10:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:10:32,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:10:32,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364719139] [2023-09-01 06:10:32,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364719139] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:10:32,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675475559] [2023-09-01 06:10:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:10:32,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:10:32,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:10:32,541 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:10:32,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 06:10:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:10:32,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 06:10:32,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:10:32,706 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-09-01 06:10:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:10:32,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:10:32,782 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 28 [2023-09-01 06:10:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:10:32,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675475559] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:10:32,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:10:32,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2023-09-01 06:10:32,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736867805] [2023-09-01 06:10:32,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:10:32,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:10:32,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:10:32,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:10:32,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:10:33,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 499 [2023-09-01 06:10:33,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 306 transitions, 3721 flow. Second operand has 13 states, 13 states have (on average 241.6153846153846) internal successors, (3141), 13 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:33,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:10:33,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 499 [2023-09-01 06:10:33,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:10:42,033 INFO L130 PetriNetUnfolder]: 37090/60393 cut-off events. [2023-09-01 06:10:42,034 INFO L131 PetriNetUnfolder]: For 269529/270458 co-relation queries the response was YES. [2023-09-01 06:10:42,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234802 conditions, 60393 events. 37090/60393 cut-off events. For 269529/270458 co-relation queries the response was YES. Maximal size of possible extension queue 1269. Compared 478943 event pairs, 6081 based on Foata normal form. 1179/48326 useless extension candidates. Maximal degree in co-relation 230294. Up to 22130 conditions per place. [2023-09-01 06:10:42,893 INFO L137 encePairwiseOnDemand]: 486/499 looper letters, 547 selfloop transitions, 91 changer transitions 0/652 dead transitions. [2023-09-01 06:10:42,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 652 transitions, 8383 flow [2023-09-01 06:10:42,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 06:10:42,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 06:10:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2152 transitions. [2023-09-01 06:10:42,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390781563126252 [2023-09-01 06:10:42,897 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2152 transitions. [2023-09-01 06:10:42,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2152 transitions. [2023-09-01 06:10:42,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:10:42,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2152 transitions. [2023-09-01 06:10:42,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 269.0) internal successors, (2152), 8 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:42,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 499.0) internal successors, (4491), 9 states have internal predecessors, (4491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:42,905 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 499.0) internal successors, (4491), 9 states have internal predecessors, (4491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:42,905 INFO L175 Difference]: Start difference. First operand has 170 places, 306 transitions, 3721 flow. Second operand 8 states and 2152 transitions. [2023-09-01 06:10:42,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 652 transitions, 8383 flow [2023-09-01 06:10:44,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 652 transitions, 8006 flow, removed 134 selfloop flow, removed 4 redundant places. [2023-09-01 06:10:44,397 INFO L231 Difference]: Finished difference. Result has 176 places, 325 transitions, 4172 flow [2023-09-01 06:10:44,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4172, PETRI_PLACES=176, PETRI_TRANSITIONS=325} [2023-09-01 06:10:44,398 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 100 predicate places. [2023-09-01 06:10:44,398 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 325 transitions, 4172 flow [2023-09-01 06:10:44,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 241.6153846153846) internal successors, (3141), 13 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:44,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:10:44,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:10:44,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 06:10:44,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 06:10:44,607 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:10:44,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:10:44,607 INFO L85 PathProgramCache]: Analyzing trace with hash -54623485, now seen corresponding path program 1 times [2023-09-01 06:10:44,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:10:44,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610340803] [2023-09-01 06:10:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:10:44,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:10:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:10:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:10:44,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:10:44,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610340803] [2023-09-01 06:10:44,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610340803] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:10:44,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:10:44,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 06:10:44,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596533656] [2023-09-01 06:10:44,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:10:44,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 06:10:44,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:10:44,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 06:10:44,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-09-01 06:10:45,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 499 [2023-09-01 06:10:45,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 325 transitions, 4172 flow. Second operand has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:45,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:10:45,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 499 [2023-09-01 06:10:45,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:10:58,502 INFO L130 PetriNetUnfolder]: 58497/95191 cut-off events. [2023-09-01 06:10:58,502 INFO L131 PetriNetUnfolder]: For 485091/486433 co-relation queries the response was YES. [2023-09-01 06:10:59,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377854 conditions, 95191 events. 58497/95191 cut-off events. For 485091/486433 co-relation queries the response was YES. Maximal size of possible extension queue 2110. Compared 795556 event pairs, 21739 based on Foata normal form. 1183/74629 useless extension candidates. Maximal degree in co-relation 370714. Up to 49585 conditions per place. [2023-09-01 06:10:59,844 INFO L137 encePairwiseOnDemand]: 487/499 looper letters, 477 selfloop transitions, 81 changer transitions 0/572 dead transitions. [2023-09-01 06:10:59,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 572 transitions, 8353 flow [2023-09-01 06:10:59,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 06:10:59,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 06:10:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2234 transitions. [2023-09-01 06:10:59,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4974393230906257 [2023-09-01 06:10:59,847 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2234 transitions. [2023-09-01 06:10:59,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2234 transitions. [2023-09-01 06:10:59,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:10:59,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2234 transitions. [2023-09-01 06:10:59,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 248.22222222222223) internal successors, (2234), 9 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:59,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:59,853 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:10:59,853 INFO L175 Difference]: Start difference. First operand has 176 places, 325 transitions, 4172 flow. Second operand 9 states and 2234 transitions. [2023-09-01 06:10:59,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 572 transitions, 8353 flow [2023-09-01 06:11:03,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 572 transitions, 8331 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 06:11:03,103 INFO L231 Difference]: Finished difference. Result has 186 places, 368 transitions, 5083 flow [2023-09-01 06:11:03,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=4160, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5083, PETRI_PLACES=186, PETRI_TRANSITIONS=368} [2023-09-01 06:11:03,103 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 110 predicate places. [2023-09-01 06:11:03,104 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 368 transitions, 5083 flow [2023-09-01 06:11:03,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:11:03,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:11:03,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:11:03,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 06:11:03,105 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:11:03,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:11:03,105 INFO L85 PathProgramCache]: Analyzing trace with hash -54623486, now seen corresponding path program 1 times [2023-09-01 06:11:03,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:11:03,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607695163] [2023-09-01 06:11:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:11:03,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:11:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:11:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:11:03,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:11:03,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607695163] [2023-09-01 06:11:03,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607695163] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:11:03,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:11:03,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 06:11:03,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721369538] [2023-09-01 06:11:03,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:11:03,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 06:11:03,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:11:03,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 06:11:03,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-09-01 06:11:03,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 499 [2023-09-01 06:11:03,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 368 transitions, 5083 flow. Second operand has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:11:03,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:11:03,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 499 [2023-09-01 06:11:03,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:11:18,261 INFO L130 PetriNetUnfolder]: 58345/95483 cut-off events. [2023-09-01 06:11:18,261 INFO L131 PetriNetUnfolder]: For 544985/546418 co-relation queries the response was YES. [2023-09-01 06:11:19,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395339 conditions, 95483 events. 58345/95483 cut-off events. For 544985/546418 co-relation queries the response was YES. Maximal size of possible extension queue 2161. Compared 810347 event pairs, 27005 based on Foata normal form. 1252/80350 useless extension candidates. Maximal degree in co-relation 390617. Up to 79017 conditions per place. [2023-09-01 06:11:19,738 INFO L137 encePairwiseOnDemand]: 486/499 looper letters, 380 selfloop transitions, 222 changer transitions 0/616 dead transitions. [2023-09-01 06:11:19,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 616 transitions, 9910 flow [2023-09-01 06:11:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 06:11:19,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 06:11:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2219 transitions. [2023-09-01 06:11:19,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49409930973057226 [2023-09-01 06:11:19,741 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2219 transitions. [2023-09-01 06:11:19,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2219 transitions. [2023-09-01 06:11:19,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:11:19,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2219 transitions. [2023-09-01 06:11:19,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 246.55555555555554) internal successors, (2219), 9 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:11:19,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:11:19,746 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:11:19,746 INFO L175 Difference]: Start difference. First operand has 186 places, 368 transitions, 5083 flow. Second operand 9 states and 2219 transitions. [2023-09-01 06:11:19,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 616 transitions, 9910 flow [2023-09-01 06:11:22,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 616 transitions, 9806 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 06:11:22,772 INFO L231 Difference]: Finished difference. Result has 193 places, 507 transitions, 8512 flow [2023-09-01 06:11:22,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=5002, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8512, PETRI_PLACES=193, PETRI_TRANSITIONS=507} [2023-09-01 06:11:22,772 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 117 predicate places. [2023-09-01 06:11:22,772 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 507 transitions, 8512 flow [2023-09-01 06:11:22,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:11:22,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:11:22,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:11:22,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 06:11:22,773 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting writer_fnErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-09-01 06:11:22,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:11:22,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1690198972, now seen corresponding path program 1 times [2023-09-01 06:11:22,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:11:22,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922523890] [2023-09-01 06:11:22,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:11:22,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:11:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:11:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 06:11:23,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:11:23,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922523890] [2023-09-01 06:11:23,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922523890] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:11:23,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:11:23,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 06:11:23,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40375638] [2023-09-01 06:11:23,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:11:23,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 06:11:23,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:11:23,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 06:11:23,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-09-01 06:11:23,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 499 [2023-09-01 06:11:23,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 507 transitions, 8512 flow. Second operand has 9 states, 9 states have (on average 236.66666666666666) internal successors, (2130), 9 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:11:23,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:11:23,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 499 [2023-09-01 06:11:23,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand