./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 TOGETHER --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 TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 13:44:43,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 13:44:43,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 13:44:43,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 13:44:43,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 13:44:43,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 13:44:43,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 13:44:43,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 13:44:43,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 13:44:43,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 13:44:43,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 13:44:43,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 13:44:43,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 13:44:43,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 13:44:43,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 13:44:43,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 13:44:43,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 13:44:43,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 13:44:43,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 13:44:43,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 13:44:43,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 13:44:43,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 13:44:43,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 13:44:43,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 13:44:43,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 13:44:43,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 13:44:43,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 13:44:43,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 13:44:43,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 13:44:43,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 13:44:43,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 13:44:43,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 13:44:43,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 13:44:43,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 13:44:43,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 13:44:43,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 13:44:43,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 13:44:43,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 13:44:43,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 13:44:43,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 13:44:43,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 13:44:43,703 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 13:44:43,729 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 13:44:43,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 13:44:43,730 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 13:44:43,730 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 13:44:43,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 13:44:43,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 13:44:43,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 13:44:43,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 13:44:43,731 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 13:44:43,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 13:44:43,732 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 13:44:43,732 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 13:44:43,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 13:44:43,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 13:44:43,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 13:44:43,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 13:44:43,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 13:44:43,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 13:44:43,733 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 13:44:43,733 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 13:44:43,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 13:44:43,733 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 13:44:43,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 13:44:43,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 13:44:43,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 13:44:43,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 13:44:43,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 13:44:43,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 13:44:43,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 13:44:43,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 13:44:43,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 13:44:43,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 13:44:43,735 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 13:44:43,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 13:44:43,735 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 13:44:43,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 13:44:43,736 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 13:44:43,736 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 13:44:43,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 13:44:43,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 13:44:43,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 13:44:43,959 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 13:44:43,960 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 13:44:43,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i [2023-08-30 13:44:44,820 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 13:44:45,121 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 13:44:45,122 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i [2023-08-30 13:44:45,134 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb6f8168/c26e957b18004690af190d561d121c7d/FLAGfa5ef19b3 [2023-08-30 13:44:45,147 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb6f8168/c26e957b18004690af190d561d121c7d [2023-08-30 13:44:45,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 13:44:45,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 13:44:45,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 13:44:45,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 13:44:45,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 13:44:45,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:44:45" (1/1) ... [2023-08-30 13:44:45,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c674e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:44:45, skipping insertion in model container [2023-08-30 13:44:45,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:44:45" (1/1) ... [2023-08-30 13:44:45,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 13:44:45,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 13:44:45,296 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 13:44:45,507 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] [2023-08-30 13:44:45,509 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] [2023-08-30 13:44:45,510 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] [2023-08-30 13:44:45,574 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] [2023-08-30 13:44:45,576 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] [2023-08-30 13:44:45,578 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] [2023-08-30 13:44:45,578 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] [2023-08-30 13:44:45,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 13:44:45,593 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 13:44:45,605 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 13:44:45,624 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] [2023-08-30 13:44:45,630 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] [2023-08-30 13:44:45,632 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] [2023-08-30 13:44:45,648 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] [2023-08-30 13:44:45,649 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] [2023-08-30 13:44:45,650 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] [2023-08-30 13:44:45,651 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] [2023-08-30 13:44:45,655 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 13:44:45,753 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 13:44:45,758 INFO L208 MainTranslator]: Completed translation [2023-08-30 13:44:45,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:44:45 WrapperNode [2023-08-30 13:44:45,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 13:44:45,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 13:44:45,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 13:44:45,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 13:44:45,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:44:45" (1/1) ... [2023-08-30 13:44:45,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:44:45" (1/1) ... [2023-08-30 13:44:45,820 INFO L138 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 229 [2023-08-30 13:44:45,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 13:44:45,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 13:44:45,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 13:44:45,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 13:44:45,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:44:45" (1/1) ... [2023-08-30 13:44:45,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:44:45" (1/1) ... [2023-08-30 13:44:45,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:44:45" (1/1) ... [2023-08-30 13:44:45,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:44:45" (1/1) ... [2023-08-30 13:44:45,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:44:45" (1/1) ... [2023-08-30 13:44:45,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:44:45" (1/1) ... [2023-08-30 13:44:45,867 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:44:45" (1/1) ... [2023-08-30 13:44:45,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:44:45" (1/1) ... [2023-08-30 13:44:45,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 13:44:45,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 13:44:45,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 13:44:45,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 13:44:45,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:44:45" (1/1) ... [2023-08-30 13:44:45,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 13:44:45,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 13:44:45,906 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) [2023-08-30 13:44:45,912 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 [2023-08-30 13:44:45,930 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2023-08-30 13:44:45,930 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2023-08-30 13:44:45,930 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2023-08-30 13:44:45,931 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2023-08-30 13:44:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 13:44:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 13:44:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 13:44:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 13:44:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 13:44:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 13:44:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 13:44:45,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 13:44:45,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 13:44:45,933 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 13:44:46,063 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 13:44:46,064 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 13:44:46,344 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 13:44:46,355 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 13:44:46,355 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 13:44:46,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:44:46 BoogieIcfgContainer [2023-08-30 13:44:46,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 13:44:46,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 13:44:46,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 13:44:46,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 13:44:46,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 01:44:45" (1/3) ... [2023-08-30 13:44:46,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527ab667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:44:46, skipping insertion in model container [2023-08-30 13:44:46,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:44:45" (2/3) ... [2023-08-30 13:44:46,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527ab667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:44:46, skipping insertion in model container [2023-08-30 13:44:46,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:44:46" (3/3) ... [2023-08-30 13:44:46,364 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2023-08-30 13:44:46,369 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 13:44:46,374 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 13:44:46,375 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-30 13:44:46,375 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 13:44:46,487 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 13:44:46,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 265 transitions, 546 flow [2023-08-30 13:44:46,627 INFO L130 PetriNetUnfolder]: 17/263 cut-off events. [2023-08-30 13:44:46,627 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 13:44:46,634 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. [2023-08-30 13:44:46,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 265 transitions, 546 flow [2023-08-30 13:44:46,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 253 transitions, 515 flow [2023-08-30 13:44:46,647 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 13:44:46,668 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 253 transitions, 515 flow [2023-08-30 13:44:46,672 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 253 transitions, 515 flow [2023-08-30 13:44:46,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 253 transitions, 515 flow [2023-08-30 13:44:46,713 INFO L130 PetriNetUnfolder]: 17/253 cut-off events. [2023-08-30 13:44:46,714 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 13:44:46,717 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. [2023-08-30 13:44:46,726 INFO L119 LiptonReduction]: Number of co-enabled transitions 28952 [2023-08-30 13:44:51,315 INFO L134 LiptonReduction]: Checked pairs total: 48388 [2023-08-30 13:44:51,316 INFO L136 LiptonReduction]: Total number of compositions: 234 [2023-08-30 13:44:51,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 13:44:51,338 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;@918feef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 13:44:51,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2023-08-30 13:44:51,342 INFO L130 PetriNetUnfolder]: 0/10 cut-off events. [2023-08-30 13:44:51,342 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 13:44:51,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:44:51,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 13:44:51,343 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)] === [2023-08-30 13:44:51,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:44:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash 96279436, now seen corresponding path program 1 times [2023-08-30 13:44:51,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:44:51,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610083501] [2023-08-30 13:44:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:44:51,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:44:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:44:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:44:51,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:44:51,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610083501] [2023-08-30 13:44:51,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610083501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 13:44:51,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 13:44:51,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 13:44:51,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808450908] [2023-08-30 13:44:51,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 13:44:51,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 13:44:51,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:44:51,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 13:44:51,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 13:44:51,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 499 [2023-08-30 13:44:51,608 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) [2023-08-30 13:44:51,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:44:51,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 499 [2023-08-30 13:44:51,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:44:53,713 INFO L130 PetriNetUnfolder]: 23212/33537 cut-off events. [2023-08-30 13:44:53,714 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-08-30 13:44:53,742 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. [2023-08-30 13:44:53,860 INFO L137 encePairwiseOnDemand]: 486/499 looper letters, 115 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-08-30 13:44:53,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 126 transitions, 498 flow [2023-08-30 13:44:53,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 13:44:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 13:44:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 867 transitions. [2023-08-30 13:44:53,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791583166332666 [2023-08-30 13:44:53,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 867 transitions. [2023-08-30 13:44:53,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 867 transitions. [2023-08-30 13:44:53,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:44:53,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 867 transitions. [2023-08-30 13:44:53,886 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) [2023-08-30 13:44:53,893 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) [2023-08-30 13:44:53,894 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) [2023-08-30 13:44:53,895 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 167 flow. Second operand 3 states and 867 transitions. [2023-08-30 13:44:53,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 126 transitions, 498 flow [2023-08-30 13:44:53,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 126 transitions, 491 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 13:44:53,904 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 166 flow [2023-08-30 13:44:53,906 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} [2023-08-30 13:44:53,909 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -4 predicate places. [2023-08-30 13:44:53,910 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 166 flow [2023-08-30 13:44:53,913 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) [2023-08-30 13:44:53,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:44:53,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 13:44:53,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 13:44:53,914 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)] === [2023-08-30 13:44:53,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:44:53,920 INFO L85 PathProgramCache]: Analyzing trace with hash 96281074, now seen corresponding path program 1 times [2023-08-30 13:44:53,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:44:53,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430090162] [2023-08-30 13:44:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:44:53,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:44:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:44:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:44:53,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:44:53,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430090162] [2023-08-30 13:44:53,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430090162] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 13:44:54,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 13:44:54,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 13:44:54,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314302997] [2023-08-30 13:44:54,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 13:44:54,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 13:44:54,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:44:54,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 13:44:54,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 13:44:54,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 499 [2023-08-30 13:44:54,015 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) [2023-08-30 13:44:54,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:44:54,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 499 [2023-08-30 13:44:54,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:44:57,153 INFO L130 PetriNetUnfolder]: 39262/56858 cut-off events. [2023-08-30 13:44:57,153 INFO L131 PetriNetUnfolder]: For 3538/3538 co-relation queries the response was YES. [2023-08-30 13:44:57,202 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. [2023-08-30 13:44:57,380 INFO L137 encePairwiseOnDemand]: 493/499 looper letters, 115 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-08-30 13:44:57,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 126 transitions, 522 flow [2023-08-30 13:44:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 13:44:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 13:44:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 848 transitions. [2023-08-30 13:44:57,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664662658650634 [2023-08-30 13:44:57,383 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 848 transitions. [2023-08-30 13:44:57,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 848 transitions. [2023-08-30 13:44:57,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:44:57,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 848 transitions. [2023-08-30 13:44:57,385 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) [2023-08-30 13:44:57,387 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) [2023-08-30 13:44:57,388 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) [2023-08-30 13:44:57,388 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 166 flow. Second operand 3 states and 848 transitions. [2023-08-30 13:44:57,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 126 transitions, 522 flow [2023-08-30 13:44:57,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 126 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 13:44:57,393 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 182 flow [2023-08-30 13:44:57,393 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} [2023-08-30 13:44:57,394 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -2 predicate places. [2023-08-30 13:44:57,394 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 182 flow [2023-08-30 13:44:57,394 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) [2023-08-30 13:44:57,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:44:57,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:44:57,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 13:44:57,395 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)] === [2023-08-30 13:44:57,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:44:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1310303017, now seen corresponding path program 1 times [2023-08-30 13:44:57,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:44:57,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019398149] [2023-08-30 13:44:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:44:57,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:44:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:44:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:44:57,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:44:57,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019398149] [2023-08-30 13:44:57,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019398149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 13:44:57,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 13:44:57,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 13:44:57,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604866162] [2023-08-30 13:44:57,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 13:44:57,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 13:44:57,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:44:57,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 13:44:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 13:44:58,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 499 [2023-08-30 13:44:58,019 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) [2023-08-30 13:44:58,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:44:58,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 499 [2023-08-30 13:44:58,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:45:01,036 INFO L130 PetriNetUnfolder]: 40108/58051 cut-off events. [2023-08-30 13:45:01,036 INFO L131 PetriNetUnfolder]: For 5283/5283 co-relation queries the response was YES. [2023-08-30 13:45:01,100 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. [2023-08-30 13:45:01,392 INFO L137 encePairwiseOnDemand]: 490/499 looper letters, 130 selfloop transitions, 12 changer transitions 0/151 dead transitions. [2023-08-30 13:45:01,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 151 transitions, 633 flow [2023-08-30 13:45:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 13:45:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 13:45:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1552 transitions. [2023-08-30 13:45:01,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518370073480294 [2023-08-30 13:45:01,395 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1552 transitions. [2023-08-30 13:45:01,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1552 transitions. [2023-08-30 13:45:01,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:45:01,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1552 transitions. [2023-08-30 13:45:01,398 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) [2023-08-30 13:45:01,402 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) [2023-08-30 13:45:01,403 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) [2023-08-30 13:45:01,403 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 182 flow. Second operand 6 states and 1552 transitions. [2023-08-30 13:45:01,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 151 transitions, 633 flow [2023-08-30 13:45:01,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 151 transitions, 628 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 13:45:01,407 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 261 flow [2023-08-30 13:45:01,408 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} [2023-08-30 13:45:01,408 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-08-30 13:45:01,408 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 261 flow [2023-08-30 13:45:01,409 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) [2023-08-30 13:45:01,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:45:01,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:45:01,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 13:45:01,409 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)] === [2023-08-30 13:45:01,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:45:01,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1310251576, now seen corresponding path program 1 times [2023-08-30 13:45:01,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:45:01,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303953866] [2023-08-30 13:45:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:45:01,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:45:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:45:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:45:01,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:45:01,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303953866] [2023-08-30 13:45:01,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303953866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 13:45:01,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 13:45:01,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 13:45:01,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632197698] [2023-08-30 13:45:01,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 13:45:01,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 13:45:01,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:45:01,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 13:45:01,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 13:45:01,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 499 [2023-08-30 13:45:01,848 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) [2023-08-30 13:45:01,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:45:01,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 499 [2023-08-30 13:45:01,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:45:04,972 INFO L130 PetriNetUnfolder]: 39798/57678 cut-off events. [2023-08-30 13:45:04,972 INFO L131 PetriNetUnfolder]: For 10405/10405 co-relation queries the response was YES. [2023-08-30 13:45:05,050 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. [2023-08-30 13:45:05,206 INFO L137 encePairwiseOnDemand]: 491/499 looper letters, 117 selfloop transitions, 19 changer transitions 0/145 dead transitions. [2023-08-30 13:45:05,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 145 transitions, 699 flow [2023-08-30 13:45:05,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 13:45:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 13:45:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1297 transitions. [2023-08-30 13:45:05,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198396793587174 [2023-08-30 13:45:05,209 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1297 transitions. [2023-08-30 13:45:05,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1297 transitions. [2023-08-30 13:45:05,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:45:05,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1297 transitions. [2023-08-30 13:45:05,212 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) [2023-08-30 13:45:05,215 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) [2023-08-30 13:45:05,216 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) [2023-08-30 13:45:05,216 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 261 flow. Second operand 5 states and 1297 transitions. [2023-08-30 13:45:05,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 145 transitions, 699 flow [2023-08-30 13:45:05,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 699 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 13:45:05,222 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 374 flow [2023-08-30 13:45:05,222 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} [2023-08-30 13:45:05,222 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 13 predicate places. [2023-08-30 13:45:05,223 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 374 flow [2023-08-30 13:45:05,223 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) [2023-08-30 13:45:05,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:45:05,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:45:05,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 13:45:05,224 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)] === [2023-08-30 13:45:05,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:45:05,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1702892387, now seen corresponding path program 1 times [2023-08-30 13:45:05,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:45:05,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277922053] [2023-08-30 13:45:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:45:05,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:45:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:45:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:45:05,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:45:05,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277922053] [2023-08-30 13:45:05,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277922053] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 13:45:05,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 13:45:05,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 13:45:05,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576889629] [2023-08-30 13:45:05,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 13:45:05,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 13:45:05,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:45:05,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 13:45:05,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 13:45:05,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 499 [2023-08-30 13:45:05,658 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) [2023-08-30 13:45:05,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:45:05,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 499 [2023-08-30 13:45:05,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:45:11,984 INFO L130 PetriNetUnfolder]: 72048/104727 cut-off events. [2023-08-30 13:45:11,984 INFO L131 PetriNetUnfolder]: For 19651/19651 co-relation queries the response was YES. [2023-08-30 13:45:12,209 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. [2023-08-30 13:45:12,512 INFO L137 encePairwiseOnDemand]: 482/499 looper letters, 403 selfloop transitions, 36 changer transitions 0/448 dead transitions. [2023-08-30 13:45:12,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 448 transitions, 2273 flow [2023-08-30 13:45:12,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 13:45:12,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 13:45:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2422 transitions. [2023-08-30 13:45:12,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393008238699621 [2023-08-30 13:45:12,517 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2422 transitions. [2023-08-30 13:45:12,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2422 transitions. [2023-08-30 13:45:12,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:45:12,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2422 transitions. [2023-08-30 13:45:12,522 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) [2023-08-30 13:45:12,526 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) [2023-08-30 13:45:12,527 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) [2023-08-30 13:45:12,527 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 374 flow. Second operand 9 states and 2422 transitions. [2023-08-30 13:45:12,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 448 transitions, 2273 flow [2023-08-30 13:45:12,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 448 transitions, 2248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 13:45:12,553 INFO L231 Difference]: Finished difference. Result has 102 places, 127 transitions, 659 flow [2023-08-30 13:45:12,554 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} [2023-08-30 13:45:12,554 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 26 predicate places. [2023-08-30 13:45:12,554 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 127 transitions, 659 flow [2023-08-30 13:45:12,555 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) [2023-08-30 13:45:12,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:45:12,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:45:12,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 13:45:12,555 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)] === [2023-08-30 13:45:12,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:45:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1702892423, now seen corresponding path program 1 times [2023-08-30 13:45:12,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:45:12,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682684391] [2023-08-30 13:45:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:45:12,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:45:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:45:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:45:12,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:45:12,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682684391] [2023-08-30 13:45:12,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682684391] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 13:45:12,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 13:45:12,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 13:45:12,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131766521] [2023-08-30 13:45:12,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 13:45:12,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 13:45:12,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:45:12,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 13:45:12,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-30 13:45:13,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 499 [2023-08-30 13:45:13,045 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) [2023-08-30 13:45:13,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:45:13,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 499 [2023-08-30 13:45:13,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:45:22,602 INFO L130 PetriNetUnfolder]: 95848/140568 cut-off events. [2023-08-30 13:45:22,602 INFO L131 PetriNetUnfolder]: For 119138/119138 co-relation queries the response was YES. [2023-08-30 13:45:23,025 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. [2023-08-30 13:45:23,422 INFO L137 encePairwiseOnDemand]: 482/499 looper letters, 443 selfloop transitions, 60 changer transitions 0/512 dead transitions. [2023-08-30 13:45:23,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 512 transitions, 2961 flow [2023-08-30 13:45:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 13:45:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 13:45:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2672 transitions. [2023-08-30 13:45:23,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354709418837675 [2023-08-30 13:45:23,427 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2672 transitions. [2023-08-30 13:45:23,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2672 transitions. [2023-08-30 13:45:23,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:45:23,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2672 transitions. [2023-08-30 13:45:23,431 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) [2023-08-30 13:45:23,436 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) [2023-08-30 13:45:23,436 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) [2023-08-30 13:45:23,437 INFO L175 Difference]: Start difference. First operand has 102 places, 127 transitions, 659 flow. Second operand 10 states and 2672 transitions. [2023-08-30 13:45:23,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 512 transitions, 2961 flow [2023-08-30 13:45:24,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 512 transitions, 2940 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 13:45:24,937 INFO L231 Difference]: Finished difference. Result has 117 places, 158 transitions, 1127 flow [2023-08-30 13:45:24,937 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} [2023-08-30 13:45:24,938 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 41 predicate places. [2023-08-30 13:45:24,938 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 158 transitions, 1127 flow [2023-08-30 13:45:24,939 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) [2023-08-30 13:45:24,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:45:24,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:45:24,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 13:45:24,939 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)] === [2023-08-30 13:45:24,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:45:24,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1787440568, now seen corresponding path program 1 times [2023-08-30 13:45:24,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:45:24,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832848941] [2023-08-30 13:45:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:45:24,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:45:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:45:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:45:25,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:45:25,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832848941] [2023-08-30 13:45:25,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832848941] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 13:45:25,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 13:45:25,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 13:45:25,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076845654] [2023-08-30 13:45:25,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 13:45:25,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 13:45:25,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:45:25,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 13:45:25,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 13:45:25,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 499 [2023-08-30 13:45:25,394 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) [2023-08-30 13:45:25,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:45:25,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 499 [2023-08-30 13:45:25,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:45:46,190 INFO L130 PetriNetUnfolder]: 183636/270934 cut-off events. [2023-08-30 13:45:46,190 INFO L131 PetriNetUnfolder]: For 506612/506612 co-relation queries the response was YES. [2023-08-30 13:45:47,264 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. [2023-08-30 13:45:48,130 INFO L137 encePairwiseOnDemand]: 483/499 looper letters, 774 selfloop transitions, 101 changer transitions 0/883 dead transitions. [2023-08-30 13:45:48,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 883 transitions, 7824 flow [2023-08-30 13:45:48,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 13:45:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 13:45:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2652 transitions. [2023-08-30 13:45:48,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314629258517034 [2023-08-30 13:45:48,134 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2652 transitions. [2023-08-30 13:45:48,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2652 transitions. [2023-08-30 13:45:48,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:45:48,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2652 transitions. [2023-08-30 13:45:48,139 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) [2023-08-30 13:45:48,143 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) [2023-08-30 13:45:48,144 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) [2023-08-30 13:45:48,144 INFO L175 Difference]: Start difference. First operand has 117 places, 158 transitions, 1127 flow. Second operand 10 states and 2652 transitions. [2023-08-30 13:45:48,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 883 transitions, 7824 flow [2023-08-30 13:45:50,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 883 transitions, 7722 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-08-30 13:45:50,557 INFO L231 Difference]: Finished difference. Result has 129 places, 281 transitions, 2578 flow [2023-08-30 13:45:50,557 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} [2023-08-30 13:45:50,557 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 53 predicate places. [2023-08-30 13:45:50,558 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 281 transitions, 2578 flow [2023-08-30 13:45:50,558 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) [2023-08-30 13:45:50,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:45:50,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:45:50,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 13:45:50,559 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)] === [2023-08-30 13:45:50,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:45:50,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1787440445, now seen corresponding path program 1 times [2023-08-30 13:45:50,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:45:50,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043145182] [2023-08-30 13:45:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:45:50,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:45:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:45:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:45:50,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:45:50,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043145182] [2023-08-30 13:45:50,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043145182] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 13:45:50,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 13:45:50,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 13:45:50,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451071990] [2023-08-30 13:45:50,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 13:45:50,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 13:45:50,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:45:50,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 13:45:50,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 13:45:51,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 499 [2023-08-30 13:45:51,073 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) [2023-08-30 13:45:51,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:45:51,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 499 [2023-08-30 13:45:51,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:46:21,320 INFO L130 PetriNetUnfolder]: 224115/331999 cut-off events. [2023-08-30 13:46:21,320 INFO L131 PetriNetUnfolder]: For 863247/863247 co-relation queries the response was YES. [2023-08-30 13:46:22,842 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. [2023-08-30 13:46:24,030 INFO L137 encePairwiseOnDemand]: 482/499 looper letters, 817 selfloop transitions, 119 changer transitions 0/944 dead transitions. [2023-08-30 13:46:24,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 944 transitions, 9246 flow [2023-08-30 13:46:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 13:46:24,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 13:46:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2652 transitions. [2023-08-30 13:46:24,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314629258517034 [2023-08-30 13:46:24,034 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2652 transitions. [2023-08-30 13:46:24,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2652 transitions. [2023-08-30 13:46:24,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:46:24,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2652 transitions. [2023-08-30 13:46:24,038 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) [2023-08-30 13:46:24,042 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) [2023-08-30 13:46:24,043 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) [2023-08-30 13:46:24,043 INFO L175 Difference]: Start difference. First operand has 129 places, 281 transitions, 2578 flow. Second operand 10 states and 2652 transitions. [2023-08-30 13:46:24,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 944 transitions, 9246 flow [2023-08-30 13:46:32,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 944 transitions, 9229 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 13:46:32,657 INFO L231 Difference]: Finished difference. Result has 143 places, 333 transitions, 3566 flow [2023-08-30 13:46:32,657 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} [2023-08-30 13:46:32,658 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 67 predicate places. [2023-08-30 13:46:32,658 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 333 transitions, 3566 flow [2023-08-30 13:46:32,659 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) [2023-08-30 13:46:32,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:46:32,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:46:32,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 13:46:32,659 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)] === [2023-08-30 13:46:32,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:46:32,659 INFO L85 PathProgramCache]: Analyzing trace with hash 83267088, now seen corresponding path program 1 times [2023-08-30 13:46:32,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:46:32,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974728961] [2023-08-30 13:46:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:46:32,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:46:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:46:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:46:32,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:46:32,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974728961] [2023-08-30 13:46:32,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974728961] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 13:46:32,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 13:46:32,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 13:46:32,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632315059] [2023-08-30 13:46:32,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 13:46:32,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 13:46:32,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:46:32,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 13:46:32,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 13:46:32,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 499 [2023-08-30 13:46:32,725 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) [2023-08-30 13:46:32,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:46:32,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 499 [2023-08-30 13:46:32,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:46:39,562 INFO L130 PetriNetUnfolder]: 40350/66506 cut-off events. [2023-08-30 13:46:39,563 INFO L131 PetriNetUnfolder]: For 225642/226208 co-relation queries the response was YES. [2023-08-30 13:46:39,867 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. [2023-08-30 13:46:40,053 INFO L137 encePairwiseOnDemand]: 489/499 looper letters, 224 selfloop transitions, 28 changer transitions 0/264 dead transitions. [2023-08-30 13:46:40,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 264 transitions, 2734 flow [2023-08-30 13:46:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 13:46:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 13:46:40,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 833 transitions. [2023-08-30 13:46:40,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564462257849031 [2023-08-30 13:46:40,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 833 transitions. [2023-08-30 13:46:40,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 833 transitions. [2023-08-30 13:46:40,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:46:40,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 833 transitions. [2023-08-30 13:46:40,057 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) [2023-08-30 13:46:40,058 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) [2023-08-30 13:46:40,058 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) [2023-08-30 13:46:40,059 INFO L175 Difference]: Start difference. First operand has 143 places, 333 transitions, 3566 flow. Second operand 3 states and 833 transitions. [2023-08-30 13:46:40,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 264 transitions, 2734 flow [2023-08-30 13:46:40,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 264 transitions, 2586 flow, removed 46 selfloop flow, removed 4 redundant places. [2023-08-30 13:46:40,982 INFO L231 Difference]: Finished difference. Result has 141 places, 224 transitions, 1906 flow [2023-08-30 13:46:40,982 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} [2023-08-30 13:46:40,983 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 65 predicate places. [2023-08-30 13:46:40,983 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 224 transitions, 1906 flow [2023-08-30 13:46:40,983 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) [2023-08-30 13:46:40,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:46:40,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:46:40,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 13:46:40,983 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)] === [2023-08-30 13:46:40,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:46:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1284730054, now seen corresponding path program 1 times [2023-08-30 13:46:40,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:46:40,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100662936] [2023-08-30 13:46:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:46:40,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:46:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:46:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:46:41,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:46:41,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100662936] [2023-08-30 13:46:41,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100662936] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 13:46:41,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087088424] [2023-08-30 13:46:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:46:41,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 13:46:41,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 13:46:41,029 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) [2023-08-30 13:46:41,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 13:46:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:46:41,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 13:46:41,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 13:46:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:46:41,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 13:46:41,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087088424] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 13:46:41,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 13:46:41,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 13:46:41,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305677627] [2023-08-30 13:46:41,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 13:46:41,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 13:46:41,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:46:41,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 13:46:41,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 13:46:41,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 499 [2023-08-30 13:46:41,174 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) [2023-08-30 13:46:41,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:46:41,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 499 [2023-08-30 13:46:41,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:46:46,473 INFO L130 PetriNetUnfolder]: 35944/58670 cut-off events. [2023-08-30 13:46:46,473 INFO L131 PetriNetUnfolder]: For 169356/170129 co-relation queries the response was YES. [2023-08-30 13:46:46,738 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. [2023-08-30 13:46:47,061 INFO L137 encePairwiseOnDemand]: 495/499 looper letters, 366 selfloop transitions, 4 changer transitions 0/382 dead transitions. [2023-08-30 13:46:47,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 382 transitions, 3778 flow [2023-08-30 13:46:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 13:46:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 13:46:47,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1133 transitions. [2023-08-30 13:46:47,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5676352705410822 [2023-08-30 13:46:47,064 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1133 transitions. [2023-08-30 13:46:47,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1133 transitions. [2023-08-30 13:46:47,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:46:47,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1133 transitions. [2023-08-30 13:46:47,065 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) [2023-08-30 13:46:47,067 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) [2023-08-30 13:46:47,067 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) [2023-08-30 13:46:47,067 INFO L175 Difference]: Start difference. First operand has 141 places, 224 transitions, 1906 flow. Second operand 4 states and 1133 transitions. [2023-08-30 13:46:47,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 382 transitions, 3778 flow [2023-08-30 13:46:47,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 382 transitions, 3674 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 13:46:47,624 INFO L231 Difference]: Finished difference. Result has 139 places, 222 transitions, 1838 flow [2023-08-30 13:46:47,625 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} [2023-08-30 13:46:47,625 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 63 predicate places. [2023-08-30 13:46:47,625 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 222 transitions, 1838 flow [2023-08-30 13:46:47,626 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) [2023-08-30 13:46:47,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:46:47,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:46:47,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 13:46:47,826 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 [2023-08-30 13:46:47,826 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)] === [2023-08-30 13:46:47,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:46:47,827 INFO L85 PathProgramCache]: Analyzing trace with hash 634637898, now seen corresponding path program 1 times [2023-08-30 13:46:47,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:46:47,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301619700] [2023-08-30 13:46:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:46:47,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:46:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:46:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:46:47,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:46:47,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301619700] [2023-08-30 13:46:47,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301619700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 13:46:47,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835650089] [2023-08-30 13:46:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:46:47,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 13:46:47,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 13:46:47,859 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) [2023-08-30 13:46:47,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 13:46:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:46:47,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 13:46:47,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 13:46:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:46:47,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 13:46:47,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835650089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 13:46:47,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 13:46:47,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 13:46:47,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680911529] [2023-08-30 13:46:47,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 13:46:47,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 13:46:47,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:46:47,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 13:46:47,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 13:46:47,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 499 [2023-08-30 13:46:47,970 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) [2023-08-30 13:46:47,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:46:47,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 499 [2023-08-30 13:46:47,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:46:52,590 INFO L130 PetriNetUnfolder]: 32022/51823 cut-off events. [2023-08-30 13:46:52,590 INFO L131 PetriNetUnfolder]: For 142703/143580 co-relation queries the response was YES. [2023-08-30 13:46:52,766 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. [2023-08-30 13:46:52,915 INFO L137 encePairwiseOnDemand]: 495/499 looper letters, 346 selfloop transitions, 4 changer transitions 0/362 dead transitions. [2023-08-30 13:46:52,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 362 transitions, 3499 flow [2023-08-30 13:46:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 13:46:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 13:46:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1121 transitions. [2023-08-30 13:46:52,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.561623246492986 [2023-08-30 13:46:52,917 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1121 transitions. [2023-08-30 13:46:52,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1121 transitions. [2023-08-30 13:46:52,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:46:52,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1121 transitions. [2023-08-30 13:46:52,919 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) [2023-08-30 13:46:52,920 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) [2023-08-30 13:46:52,921 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) [2023-08-30 13:46:52,921 INFO L175 Difference]: Start difference. First operand has 139 places, 222 transitions, 1838 flow. Second operand 4 states and 1121 transitions. [2023-08-30 13:46:52,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 362 transitions, 3499 flow [2023-08-30 13:46:53,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 362 transitions, 3483 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 13:46:53,392 INFO L231 Difference]: Finished difference. Result has 138 places, 220 transitions, 1830 flow [2023-08-30 13:46:53,392 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} [2023-08-30 13:46:53,392 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 62 predicate places. [2023-08-30 13:46:53,392 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 220 transitions, 1830 flow [2023-08-30 13:46:53,393 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) [2023-08-30 13:46:53,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:46:53,393 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:46:53,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 13:46:53,593 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 [2023-08-30 13:46:53,593 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)] === [2023-08-30 13:46:53,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:46:53,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1171924247, now seen corresponding path program 1 times [2023-08-30 13:46:53,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:46:53,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518307542] [2023-08-30 13:46:53,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:46:53,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:46:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:46:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:46:53,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:46:53,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518307542] [2023-08-30 13:46:53,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518307542] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 13:46:53,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947256112] [2023-08-30 13:46:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:46:53,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 13:46:53,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 13:46:53,819 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) [2023-08-30 13:46:53,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 13:46:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:46:53,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 13:46:53,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 13:46:53,986 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 [2023-08-30 13:46:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:46:54,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 13:46:54,070 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 [2023-08-30 13:46:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:46:54,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947256112] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 13:46:54,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 13:46:54,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2023-08-30 13:46:54,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296454584] [2023-08-30 13:46:54,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 13:46:54,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 13:46:54,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:46:54,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 13:46:54,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-30 13:46:54,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 499 [2023-08-30 13:46:54,745 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) [2023-08-30 13:46:54,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:46:54,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 499 [2023-08-30 13:46:54,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:46:59,796 INFO L130 PetriNetUnfolder]: 33557/54166 cut-off events. [2023-08-30 13:46:59,797 INFO L131 PetriNetUnfolder]: For 135748/136478 co-relation queries the response was YES. [2023-08-30 13:47:00,004 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. [2023-08-30 13:47:00,164 INFO L137 encePairwiseOnDemand]: 487/499 looper letters, 416 selfloop transitions, 61 changer transitions 0/489 dead transitions. [2023-08-30 13:47:00,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 489 transitions, 4449 flow [2023-08-30 13:47:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 13:47:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 13:47:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2143 transitions. [2023-08-30 13:47:00,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5368236472945892 [2023-08-30 13:47:00,167 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2143 transitions. [2023-08-30 13:47:00,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2143 transitions. [2023-08-30 13:47:00,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:47:00,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2143 transitions. [2023-08-30 13:47:00,171 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) [2023-08-30 13:47:00,173 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) [2023-08-30 13:47:00,174 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) [2023-08-30 13:47:00,174 INFO L175 Difference]: Start difference. First operand has 138 places, 220 transitions, 1830 flow. Second operand 8 states and 2143 transitions. [2023-08-30 13:47:00,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 489 transitions, 4449 flow [2023-08-30 13:47:00,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 489 transitions, 4427 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 13:47:00,776 INFO L231 Difference]: Finished difference. Result has 145 places, 238 transitions, 2261 flow [2023-08-30 13:47:00,777 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} [2023-08-30 13:47:00,777 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 69 predicate places. [2023-08-30 13:47:00,777 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 238 transitions, 2261 flow [2023-08-30 13:47:00,778 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) [2023-08-30 13:47:00,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:47:00,778 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:47:00,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 13:47:00,982 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 [2023-08-30 13:47:00,982 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)] === [2023-08-30 13:47:00,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:47:00,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1801059216, now seen corresponding path program 1 times [2023-08-30 13:47:00,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:47:00,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999211949] [2023-08-30 13:47:00,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:47:00,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:47:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:47:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:47:01,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:47:01,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999211949] [2023-08-30 13:47:01,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999211949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 13:47:01,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349893778] [2023-08-30 13:47:01,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:47:01,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 13:47:01,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 13:47:01,203 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) [2023-08-30 13:47:01,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 13:47:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:47:01,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 13:47:01,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 13:47:01,332 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 [2023-08-30 13:47:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:47:01,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 13:47:01,402 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 [2023-08-30 13:47:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:47:01,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349893778] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 13:47:01,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 13:47:01,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-08-30 13:47:01,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838448613] [2023-08-30 13:47:01,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 13:47:01,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 13:47:01,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:47:01,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 13:47:01,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-08-30 13:47:02,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 499 [2023-08-30 13:47:02,012 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) [2023-08-30 13:47:02,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:47:02,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 499 [2023-08-30 13:47:02,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:47:07,298 INFO L130 PetriNetUnfolder]: 34466/55443 cut-off events. [2023-08-30 13:47:07,299 INFO L131 PetriNetUnfolder]: For 174924/175967 co-relation queries the response was YES. [2023-08-30 13:47:07,525 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. [2023-08-30 13:47:07,694 INFO L137 encePairwiseOnDemand]: 489/499 looper letters, 390 selfloop transitions, 39 changer transitions 0/441 dead transitions. [2023-08-30 13:47:07,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 441 transitions, 4619 flow [2023-08-30 13:47:07,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 13:47:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 13:47:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1608 transitions. [2023-08-30 13:47:07,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370741482965932 [2023-08-30 13:47:07,697 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1608 transitions. [2023-08-30 13:47:07,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1608 transitions. [2023-08-30 13:47:07,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:47:07,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1608 transitions. [2023-08-30 13:47:07,700 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) [2023-08-30 13:47:07,702 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) [2023-08-30 13:47:07,702 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) [2023-08-30 13:47:07,703 INFO L175 Difference]: Start difference. First operand has 145 places, 238 transitions, 2261 flow. Second operand 6 states and 1608 transitions. [2023-08-30 13:47:07,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 441 transitions, 4619 flow [2023-08-30 13:47:08,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 441 transitions, 4575 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-30 13:47:08,209 INFO L231 Difference]: Finished difference. Result has 148 places, 244 transitions, 2487 flow [2023-08-30 13:47:08,209 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} [2023-08-30 13:47:08,210 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 72 predicate places. [2023-08-30 13:47:08,210 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 244 transitions, 2487 flow [2023-08-30 13:47:08,210 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) [2023-08-30 13:47:08,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:47:08,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:47:08,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 13:47:08,411 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 [2023-08-30 13:47:08,411 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)] === [2023-08-30 13:47:08,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:47:08,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1801059253, now seen corresponding path program 1 times [2023-08-30 13:47:08,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:47:08,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823044853] [2023-08-30 13:47:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:47:08,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:47:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:47:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:47:08,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:47:08,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823044853] [2023-08-30 13:47:08,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823044853] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 13:47:08,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292137010] [2023-08-30 13:47:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:47:08,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 13:47:08,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 13:47:08,965 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) [2023-08-30 13:47:08,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 13:47:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:47:09,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 13:47:09,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 13:47:09,093 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 [2023-08-30 13:47:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:47:09,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 13:47:09,161 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 [2023-08-30 13:47:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:47:09,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292137010] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 13:47:09,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 13:47:09,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 15 [2023-08-30 13:47:09,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237570631] [2023-08-30 13:47:09,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 13:47:09,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 13:47:09,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:47:09,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 13:47:09,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-30 13:47:10,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 499 [2023-08-30 13:47:10,013 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) [2023-08-30 13:47:10,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:47:10,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 499 [2023-08-30 13:47:10,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:47:16,632 INFO L130 PetriNetUnfolder]: 39460/63208 cut-off events. [2023-08-30 13:47:16,632 INFO L131 PetriNetUnfolder]: For 210734/210734 co-relation queries the response was YES. [2023-08-30 13:47:16,895 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. [2023-08-30 13:47:17,073 INFO L137 encePairwiseOnDemand]: 483/499 looper letters, 612 selfloop transitions, 121 changer transitions 0/741 dead transitions. [2023-08-30 13:47:17,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 741 transitions, 7271 flow [2023-08-30 13:47:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 13:47:17,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 13:47:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4218 transitions. [2023-08-30 13:47:17,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722975362489685 [2023-08-30 13:47:17,079 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4218 transitions. [2023-08-30 13:47:17,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4218 transitions. [2023-08-30 13:47:17,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:47:17,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4218 transitions. [2023-08-30 13:47:17,085 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) [2023-08-30 13:47:17,090 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) [2023-08-30 13:47:17,091 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) [2023-08-30 13:47:17,091 INFO L175 Difference]: Start difference. First operand has 148 places, 244 transitions, 2487 flow. Second operand 17 states and 4218 transitions. [2023-08-30 13:47:17,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 741 transitions, 7271 flow [2023-08-30 13:47:18,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 741 transitions, 7146 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 13:47:18,089 INFO L231 Difference]: Finished difference. Result has 170 places, 306 transitions, 3721 flow [2023-08-30 13:47:18,089 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} [2023-08-30 13:47:18,089 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 94 predicate places. [2023-08-30 13:47:18,090 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 306 transitions, 3721 flow [2023-08-30 13:47:18,090 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) [2023-08-30 13:47:18,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:47:18,090 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:47:18,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 13:47:18,290 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 [2023-08-30 13:47:18,291 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)] === [2023-08-30 13:47:18,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:47:18,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1171924381, now seen corresponding path program 1 times [2023-08-30 13:47:18,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:47:18,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493122574] [2023-08-30 13:47:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:47:18,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:47:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:47:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:47:18,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:47:18,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493122574] [2023-08-30 13:47:18,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493122574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 13:47:18,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935316794] [2023-08-30 13:47:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:47:18,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 13:47:18,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 13:47:18,501 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) [2023-08-30 13:47:18,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 13:47:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:47:18,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 13:47:18,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 13:47:18,626 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 [2023-08-30 13:47:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:47:18,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 13:47:18,685 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 [2023-08-30 13:47:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:47:18,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935316794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 13:47:18,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 13:47:18,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2023-08-30 13:47:18,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293321462] [2023-08-30 13:47:18,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 13:47:18,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 13:47:18,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:47:18,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 13:47:18,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-30 13:47:19,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 499 [2023-08-30 13:47:19,481 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) [2023-08-30 13:47:19,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:47:19,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 499 [2023-08-30 13:47:19,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:47:26,580 INFO L130 PetriNetUnfolder]: 37090/60393 cut-off events. [2023-08-30 13:47:26,580 INFO L131 PetriNetUnfolder]: For 269529/270458 co-relation queries the response was YES. [2023-08-30 13:47:26,939 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. [2023-08-30 13:47:27,271 INFO L137 encePairwiseOnDemand]: 486/499 looper letters, 547 selfloop transitions, 91 changer transitions 0/652 dead transitions. [2023-08-30 13:47:27,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 652 transitions, 8383 flow [2023-08-30 13:47:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 13:47:27,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 13:47:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2152 transitions. [2023-08-30 13:47:27,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390781563126252 [2023-08-30 13:47:27,274 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2152 transitions. [2023-08-30 13:47:27,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2152 transitions. [2023-08-30 13:47:27,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:47:27,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2152 transitions. [2023-08-30 13:47:27,277 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) [2023-08-30 13:47:27,280 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) [2023-08-30 13:47:27,280 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) [2023-08-30 13:47:27,280 INFO L175 Difference]: Start difference. First operand has 170 places, 306 transitions, 3721 flow. Second operand 8 states and 2152 transitions. [2023-08-30 13:47:27,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 652 transitions, 8383 flow [2023-08-30 13:47:28,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 652 transitions, 8006 flow, removed 134 selfloop flow, removed 4 redundant places. [2023-08-30 13:47:28,618 INFO L231 Difference]: Finished difference. Result has 176 places, 325 transitions, 4172 flow [2023-08-30 13:47:28,618 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} [2023-08-30 13:47:28,618 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 100 predicate places. [2023-08-30 13:47:28,618 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 325 transitions, 4172 flow [2023-08-30 13:47:28,619 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) [2023-08-30 13:47:28,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:47:28,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:47:28,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 13:47:28,822 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 [2023-08-30 13:47:28,823 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)] === [2023-08-30 13:47:28,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:47:28,823 INFO L85 PathProgramCache]: Analyzing trace with hash -54623485, now seen corresponding path program 1 times [2023-08-30 13:47:28,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:47:28,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824925684] [2023-08-30 13:47:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:47:28,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:47:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:47:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:47:29,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:47:29,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824925684] [2023-08-30 13:47:29,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824925684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 13:47:29,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 13:47:29,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 13:47:29,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690610284] [2023-08-30 13:47:29,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 13:47:29,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 13:47:29,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:47:29,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 13:47:29,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-30 13:47:29,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 499 [2023-08-30 13:47:29,364 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) [2023-08-30 13:47:29,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:47:29,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 499 [2023-08-30 13:47:29,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:47:40,527 INFO L130 PetriNetUnfolder]: 58497/95191 cut-off events. [2023-08-30 13:47:40,527 INFO L131 PetriNetUnfolder]: For 485091/486433 co-relation queries the response was YES. [2023-08-30 13:47:41,164 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. [2023-08-30 13:47:41,452 INFO L137 encePairwiseOnDemand]: 487/499 looper letters, 477 selfloop transitions, 81 changer transitions 0/572 dead transitions. [2023-08-30 13:47:41,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 572 transitions, 8353 flow [2023-08-30 13:47:41,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 13:47:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 13:47:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2234 transitions. [2023-08-30 13:47:41,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4974393230906257 [2023-08-30 13:47:41,454 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2234 transitions. [2023-08-30 13:47:41,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2234 transitions. [2023-08-30 13:47:41,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:47:41,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2234 transitions. [2023-08-30 13:47:41,456 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) [2023-08-30 13:47:41,459 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) [2023-08-30 13:47:41,459 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) [2023-08-30 13:47:41,459 INFO L175 Difference]: Start difference. First operand has 176 places, 325 transitions, 4172 flow. Second operand 9 states and 2234 transitions. [2023-08-30 13:47:41,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 572 transitions, 8353 flow [2023-08-30 13:47:44,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 572 transitions, 8331 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 13:47:44,653 INFO L231 Difference]: Finished difference. Result has 186 places, 368 transitions, 5083 flow [2023-08-30 13:47:44,653 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} [2023-08-30 13:47:44,654 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 110 predicate places. [2023-08-30 13:47:44,654 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 368 transitions, 5083 flow [2023-08-30 13:47:44,654 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) [2023-08-30 13:47:44,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:47:44,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:47:44,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 13:47:44,655 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)] === [2023-08-30 13:47:44,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:47:44,655 INFO L85 PathProgramCache]: Analyzing trace with hash -54623486, now seen corresponding path program 1 times [2023-08-30 13:47:44,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:47:44,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489400835] [2023-08-30 13:47:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:47:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:47:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:47:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:47:44,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:47:44,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489400835] [2023-08-30 13:47:44,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489400835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 13:47:44,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 13:47:44,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 13:47:44,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133227231] [2023-08-30 13:47:44,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 13:47:44,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 13:47:44,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:47:44,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 13:47:44,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-30 13:47:45,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 499 [2023-08-30 13:47:45,169 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) [2023-08-30 13:47:45,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:47:45,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 499 [2023-08-30 13:47:45,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 13:47:57,436 INFO L130 PetriNetUnfolder]: 58345/95483 cut-off events. [2023-08-30 13:47:57,436 INFO L131 PetriNetUnfolder]: For 544985/546418 co-relation queries the response was YES. [2023-08-30 13:47:58,191 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. [2023-08-30 13:47:58,663 INFO L137 encePairwiseOnDemand]: 486/499 looper letters, 380 selfloop transitions, 222 changer transitions 0/616 dead transitions. [2023-08-30 13:47:58,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 616 transitions, 9910 flow [2023-08-30 13:47:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 13:47:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 13:47:58,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2219 transitions. [2023-08-30 13:47:58,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49409930973057226 [2023-08-30 13:47:58,666 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2219 transitions. [2023-08-30 13:47:58,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2219 transitions. [2023-08-30 13:47:58,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 13:47:58,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2219 transitions. [2023-08-30 13:47:58,668 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) [2023-08-30 13:47:58,670 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) [2023-08-30 13:47:58,670 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) [2023-08-30 13:47:58,670 INFO L175 Difference]: Start difference. First operand has 186 places, 368 transitions, 5083 flow. Second operand 9 states and 2219 transitions. [2023-08-30 13:47:58,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 616 transitions, 9910 flow [2023-08-30 13:48:01,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 616 transitions, 9806 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 13:48:01,778 INFO L231 Difference]: Finished difference. Result has 193 places, 507 transitions, 8512 flow [2023-08-30 13:48:01,779 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} [2023-08-30 13:48:01,779 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 117 predicate places. [2023-08-30 13:48:01,779 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 507 transitions, 8512 flow [2023-08-30 13:48:01,779 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) [2023-08-30 13:48:01,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 13:48:01,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 13:48:01,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 13:48:01,780 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)] === [2023-08-30 13:48:01,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 13:48:01,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1690198972, now seen corresponding path program 1 times [2023-08-30 13:48:01,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 13:48:01,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096106969] [2023-08-30 13:48:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 13:48:01,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 13:48:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 13:48:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 13:48:01,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 13:48:01,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096106969] [2023-08-30 13:48:01,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096106969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 13:48:01,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 13:48:01,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 13:48:01,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802958118] [2023-08-30 13:48:01,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 13:48:01,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 13:48:01,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 13:48:01,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 13:48:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-08-30 13:48:02,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 499 [2023-08-30 13:48:02,357 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) [2023-08-30 13:48:02,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 13:48:02,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 499 [2023-08-30 13:48:02,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand