./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 AFTER --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 AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 09:32:12,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 09:32:12,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 09:32:12,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 09:32:12,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 09:32:12,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 09:32:12,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 09:32:12,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 09:32:12,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 09:32:12,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 09:32:12,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 09:32:12,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 09:32:12,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 09:32:12,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 09:32:12,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 09:32:12,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 09:32:12,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 09:32:12,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 09:32:12,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 09:32:12,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 09:32:12,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 09:32:12,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 09:32:12,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 09:32:12,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 09:32:12,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 09:32:12,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 09:32:12,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 09:32:12,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 09:32:12,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 09:32:12,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 09:32:12,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 09:32:12,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 09:32:12,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 09:32:12,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 09:32:12,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 09:32:12,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 09:32:12,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 09:32:12,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 09:32:12,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 09:32:12,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 09:32:12,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 09:32:12,626 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 09:32:12,664 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 09:32:12,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 09:32:12,667 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 09:32:12,667 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 09:32:12,668 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 09:32:12,668 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 09:32:12,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 09:32:12,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 09:32:12,669 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 09:32:12,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 09:32:12,669 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 09:32:12,670 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 09:32:12,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 09:32:12,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 09:32:12,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 09:32:12,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 09:32:12,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 09:32:12,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 09:32:12,671 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 09:32:12,671 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 09:32:12,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 09:32:12,671 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 09:32:12,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 09:32:12,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 09:32:12,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 09:32:12,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 09:32:12,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 09:32:12,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 09:32:12,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 09:32:12,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 09:32:12,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 09:32:12,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 09:32:12,673 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 09:32:12,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 09:32:12,674 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 09:32:12,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 09:32:12,675 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 09:32:12,675 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 09:32:12,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 09:32:12,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 09:32:13,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 09:32:13,001 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 09:32:13,002 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 09:32:13,003 INFO L432 ainManager$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 09:32:14,204 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 09:32:14,461 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 09:32:14,461 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i [2023-08-30 09:32:14,477 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2e586fea/8244784363434bbcbdf716f2eff9de3a/FLAG3182a4f69 [2023-08-30 09:32:14,488 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2e586fea/8244784363434bbcbdf716f2eff9de3a [2023-08-30 09:32:14,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 09:32:14,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 09:32:14,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 09:32:14,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 09:32:14,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 09:32:14,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:32:14" (1/1) ... [2023-08-30 09:32:14,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d0736fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:32:14, skipping insertion in model container [2023-08-30 09:32:14,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:32:14" (1/1) ... [2023-08-30 09:32:14,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 09:32:14,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 09:32:14,666 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 09:32:14,909 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 09:32:14,911 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 09:32:14,913 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 09:32:14,985 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 09:32:14,987 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 09:32:14,989 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 09:32:14,990 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 09:32:14,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 09:32:15,008 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 09:32:15,026 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 09:32:15,052 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 09:32:15,053 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 09:32:15,058 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 09:32:15,067 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 09:32:15,067 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 09:32:15,069 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 09:32:15,069 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 09:32:15,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 09:32:15,136 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 09:32:15,142 INFO L208 MainTranslator]: Completed translation [2023-08-30 09:32:15,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:32:15 WrapperNode [2023-08-30 09:32:15,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 09:32:15,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 09:32:15,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 09:32:15,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 09:32:15,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:32:15" (1/1) ... [2023-08-30 09:32:15,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:32:15" (1/1) ... [2023-08-30 09:32:15,225 INFO L138 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 229 [2023-08-30 09:32:15,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 09:32:15,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 09:32:15,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 09:32:15,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 09:32:15,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:32:15" (1/1) ... [2023-08-30 09:32:15,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:32:15" (1/1) ... [2023-08-30 09:32:15,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:32:15" (1/1) ... [2023-08-30 09:32:15,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:32:15" (1/1) ... [2023-08-30 09:32:15,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:32:15" (1/1) ... [2023-08-30 09:32:15,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:32:15" (1/1) ... [2023-08-30 09:32:15,276 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:32:15" (1/1) ... [2023-08-30 09:32:15,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:32:15" (1/1) ... [2023-08-30 09:32:15,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 09:32:15,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 09:32:15,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 09:32:15,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 09:32:15,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:32:15" (1/1) ... [2023-08-30 09:32:15,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 09:32:15,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 09:32:15,317 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 09:32:15,348 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 09:32:15,362 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2023-08-30 09:32:15,362 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2023-08-30 09:32:15,362 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2023-08-30 09:32:15,362 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2023-08-30 09:32:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 09:32:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 09:32:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 09:32:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 09:32:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 09:32:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 09:32:15,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 09:32:15,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 09:32:15,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 09:32:15,366 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 09:32:15,551 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 09:32:15,554 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 09:32:15,899 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 09:32:15,908 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 09:32:15,908 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 09:32:15,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:32:15 BoogieIcfgContainer [2023-08-30 09:32:15,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 09:32:15,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 09:32:15,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 09:32:15,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 09:32:15,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:32:14" (1/3) ... [2023-08-30 09:32:15,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187b8327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:32:15, skipping insertion in model container [2023-08-30 09:32:15,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:32:15" (2/3) ... [2023-08-30 09:32:15,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187b8327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:32:15, skipping insertion in model container [2023-08-30 09:32:15,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:32:15" (3/3) ... [2023-08-30 09:32:15,917 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2023-08-30 09:32:15,924 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 09:32:15,932 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 09:32:15,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-30 09:32:15,932 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 09:32:16,042 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 09:32:16,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 265 transitions, 546 flow [2023-08-30 09:32:16,153 INFO L130 PetriNetUnfolder]: 17/263 cut-off events. [2023-08-30 09:32:16,153 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 09:32:16,165 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 09:32:16,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 265 transitions, 546 flow [2023-08-30 09:32:16,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 253 transitions, 515 flow [2023-08-30 09:32:16,183 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 09:32:16,191 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 253 transitions, 515 flow [2023-08-30 09:32:16,193 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 253 transitions, 515 flow [2023-08-30 09:32:16,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 253 transitions, 515 flow [2023-08-30 09:32:16,238 INFO L130 PetriNetUnfolder]: 17/253 cut-off events. [2023-08-30 09:32:16,238 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 09:32:16,242 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 09:32:16,253 INFO L119 LiptonReduction]: Number of co-enabled transitions 28952 [2023-08-30 09:32:21,773 INFO L134 LiptonReduction]: Checked pairs total: 48388 [2023-08-30 09:32:21,773 INFO L136 LiptonReduction]: Total number of compositions: 234 [2023-08-30 09:32:21,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 09:32:21,791 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;@58b13743, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 09:32:21,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2023-08-30 09:32:21,796 INFO L130 PetriNetUnfolder]: 0/10 cut-off events. [2023-08-30 09:32:21,796 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 09:32:21,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 09:32:21,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 09:32:21,797 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 09:32:21,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 09:32:21,802 INFO L85 PathProgramCache]: Analyzing trace with hash 96279436, now seen corresponding path program 1 times [2023-08-30 09:32:21,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 09:32:21,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418639108] [2023-08-30 09:32:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 09:32:21,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 09:32:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 09:32:22,123 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 09:32:22,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 09:32:22,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418639108] [2023-08-30 09:32:22,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418639108] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 09:32:22,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 09:32:22,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 09:32:22,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885979176] [2023-08-30 09:32:22,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 09:32:22,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 09:32:22,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 09:32:22,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 09:32:22,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 09:32:22,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 499 [2023-08-30 09:32:22,243 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 09:32:22,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 09:32:22,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 499 [2023-08-30 09:32:22,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 09:32:25,219 INFO L130 PetriNetUnfolder]: 23212/33537 cut-off events. [2023-08-30 09:32:25,219 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-08-30 09:32:25,264 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 09:32:25,433 INFO L137 encePairwiseOnDemand]: 486/499 looper letters, 115 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-08-30 09:32:25,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 126 transitions, 498 flow [2023-08-30 09:32:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 09:32:25,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 09:32:25,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 867 transitions. [2023-08-30 09:32:25,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791583166332666 [2023-08-30 09:32:25,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 867 transitions. [2023-08-30 09:32:25,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 867 transitions. [2023-08-30 09:32:25,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 09:32:25,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 867 transitions. [2023-08-30 09:32:25,469 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 09:32:25,476 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 09:32:25,477 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 09:32:25,480 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 167 flow. Second operand 3 states and 867 transitions. [2023-08-30 09:32:25,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 126 transitions, 498 flow [2023-08-30 09:32:25,486 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 09:32:25,489 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 166 flow [2023-08-30 09:32:25,492 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 09:32:25,496 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -4 predicate places. [2023-08-30 09:32:25,496 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 166 flow [2023-08-30 09:32:25,500 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 09:32:25,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 09:32:25,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 09:32:25,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 09:32:25,501 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 09:32:25,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 09:32:25,503 INFO L85 PathProgramCache]: Analyzing trace with hash 96281074, now seen corresponding path program 1 times [2023-08-30 09:32:25,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 09:32:25,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599003821] [2023-08-30 09:32:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 09:32:25,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 09:32:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 09:32:25,588 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 09:32:25,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 09:32:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599003821] [2023-08-30 09:32:25,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599003821] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 09:32:25,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 09:32:25,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 09:32:25,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085722728] [2023-08-30 09:32:25,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 09:32:25,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 09:32:25,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 09:32:25,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 09:32:25,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 09:32:25,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 499 [2023-08-30 09:32:25,615 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 09:32:25,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 09:32:25,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 499 [2023-08-30 09:32:25,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 09:32:29,306 INFO L130 PetriNetUnfolder]: 39262/56858 cut-off events. [2023-08-30 09:32:29,307 INFO L131 PetriNetUnfolder]: For 3538/3538 co-relation queries the response was YES. [2023-08-30 09:32:29,374 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 09:32:29,603 INFO L137 encePairwiseOnDemand]: 493/499 looper letters, 115 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-08-30 09:32:29,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 126 transitions, 522 flow [2023-08-30 09:32:29,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 09:32:29,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 09:32:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 848 transitions. [2023-08-30 09:32:29,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664662658650634 [2023-08-30 09:32:29,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 848 transitions. [2023-08-30 09:32:29,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 848 transitions. [2023-08-30 09:32:29,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 09:32:29,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 848 transitions. [2023-08-30 09:32:29,610 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 09:32:29,612 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 09:32:29,614 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 09:32:29,614 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 166 flow. Second operand 3 states and 848 transitions. [2023-08-30 09:32:29,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 126 transitions, 522 flow [2023-08-30 09:32:29,618 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 09:32:29,620 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 182 flow [2023-08-30 09:32:29,621 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 09:32:29,623 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -2 predicate places. [2023-08-30 09:32:29,623 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 182 flow [2023-08-30 09:32:29,623 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 09:32:29,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 09:32:29,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 09:32:29,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 09:32:29,624 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 09:32:29,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 09:32:29,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1310303017, now seen corresponding path program 1 times [2023-08-30 09:32:29,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 09:32:29,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936137018] [2023-08-30 09:32:29,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 09:32:29,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 09:32:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 09:32:30,060 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 09:32:30,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 09:32:30,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936137018] [2023-08-30 09:32:30,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936137018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 09:32:30,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 09:32:30,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 09:32:30,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506816346] [2023-08-30 09:32:30,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 09:32:30,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 09:32:30,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 09:32:30,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 09:32:30,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 09:32:30,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 499 [2023-08-30 09:32:30,464 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 09:32:30,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 09:32:30,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 499 [2023-08-30 09:32:30,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 09:32:33,874 INFO L130 PetriNetUnfolder]: 40108/58051 cut-off events. [2023-08-30 09:32:33,875 INFO L131 PetriNetUnfolder]: For 5283/5283 co-relation queries the response was YES. [2023-08-30 09:32:33,940 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 09:32:34,155 INFO L137 encePairwiseOnDemand]: 490/499 looper letters, 130 selfloop transitions, 12 changer transitions 0/151 dead transitions. [2023-08-30 09:32:34,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 151 transitions, 633 flow [2023-08-30 09:32:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 09:32:34,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 09:32:34,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1552 transitions. [2023-08-30 09:32:34,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518370073480294 [2023-08-30 09:32:34,160 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1552 transitions. [2023-08-30 09:32:34,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1552 transitions. [2023-08-30 09:32:34,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 09:32:34,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1552 transitions. [2023-08-30 09:32:34,165 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 09:32:34,170 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 09:32:34,171 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 09:32:34,172 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 182 flow. Second operand 6 states and 1552 transitions. [2023-08-30 09:32:34,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 151 transitions, 633 flow [2023-08-30 09:32:34,177 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 09:32:34,179 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 261 flow [2023-08-30 09:32:34,180 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 09:32:34,181 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-08-30 09:32:34,181 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 261 flow [2023-08-30 09:32:34,182 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 09:32:34,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 09:32:34,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 09:32:34,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 09:32:34,183 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 09:32:34,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 09:32:34,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1310251576, now seen corresponding path program 1 times [2023-08-30 09:32:34,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 09:32:34,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659297315] [2023-08-30 09:32:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 09:32:34,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 09:32:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 09:32:34,580 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 09:32:34,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 09:32:34,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659297315] [2023-08-30 09:32:34,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659297315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 09:32:34,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 09:32:34,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 09:32:34,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275207227] [2023-08-30 09:32:34,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 09:32:34,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 09:32:34,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 09:32:34,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 09:32:34,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 09:32:34,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 499 [2023-08-30 09:32:34,842 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 09:32:34,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 09:32:34,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 499 [2023-08-30 09:32:34,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 09:32:38,485 INFO L130 PetriNetUnfolder]: 39798/57678 cut-off events. [2023-08-30 09:32:38,485 INFO L131 PetriNetUnfolder]: For 10405/10405 co-relation queries the response was YES. [2023-08-30 09:32:38,595 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 09:32:38,974 INFO L137 encePairwiseOnDemand]: 491/499 looper letters, 117 selfloop transitions, 19 changer transitions 0/145 dead transitions. [2023-08-30 09:32:38,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 145 transitions, 699 flow [2023-08-30 09:32:38,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 09:32:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 09:32:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1297 transitions. [2023-08-30 09:32:38,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198396793587174 [2023-08-30 09:32:38,979 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1297 transitions. [2023-08-30 09:32:38,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1297 transitions. [2023-08-30 09:32:38,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 09:32:38,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1297 transitions. [2023-08-30 09:32:38,982 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 09:32:38,986 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 09:32:38,988 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 09:32:38,988 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 261 flow. Second operand 5 states and 1297 transitions. [2023-08-30 09:32:38,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 145 transitions, 699 flow [2023-08-30 09:32:38,994 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 09:32:38,997 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 374 flow [2023-08-30 09:32:38,997 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 09:32:38,998 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 13 predicate places. [2023-08-30 09:32:38,999 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 374 flow [2023-08-30 09:32:39,000 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 09:32:39,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 09:32:39,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 09:32:39,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 09:32:39,000 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 09:32:39,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 09:32:39,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1702892387, now seen corresponding path program 1 times [2023-08-30 09:32:39,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 09:32:39,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826187543] [2023-08-30 09:32:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 09:32:39,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 09:32:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 09:32:39,232 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 09:32:39,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 09:32:39,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826187543] [2023-08-30 09:32:39,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826187543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 09:32:39,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 09:32:39,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 09:32:39,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072130515] [2023-08-30 09:32:39,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 09:32:39,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 09:32:39,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 09:32:39,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 09:32:39,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 09:32:39,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 499 [2023-08-30 09:32:39,572 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 09:32:39,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 09:32:39,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 499 [2023-08-30 09:32:39,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 09:32:46,811 INFO L130 PetriNetUnfolder]: 72048/104727 cut-off events. [2023-08-30 09:32:46,811 INFO L131 PetriNetUnfolder]: For 19651/19651 co-relation queries the response was YES. [2023-08-30 09:32:47,115 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 09:32:47,643 INFO L137 encePairwiseOnDemand]: 482/499 looper letters, 403 selfloop transitions, 36 changer transitions 0/448 dead transitions. [2023-08-30 09:32:47,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 448 transitions, 2273 flow [2023-08-30 09:32:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 09:32:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 09:32:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2422 transitions. [2023-08-30 09:32:47,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393008238699621 [2023-08-30 09:32:47,649 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2422 transitions. [2023-08-30 09:32:47,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2422 transitions. [2023-08-30 09:32:47,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 09:32:47,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2422 transitions. [2023-08-30 09:32:47,656 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 09:32:47,662 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 09:32:47,663 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 09:32:47,663 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 374 flow. Second operand 9 states and 2422 transitions. [2023-08-30 09:32:47,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 448 transitions, 2273 flow [2023-08-30 09:32:47,692 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 09:32:47,696 INFO L231 Difference]: Finished difference. Result has 102 places, 127 transitions, 659 flow [2023-08-30 09:32:47,697 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 09:32:47,697 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 26 predicate places. [2023-08-30 09:32:47,697 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 127 transitions, 659 flow [2023-08-30 09:32:47,698 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 09:32:47,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 09:32:47,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 09:32:47,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 09:32:47,699 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 09:32:47,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 09:32:47,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1702892423, now seen corresponding path program 1 times [2023-08-30 09:32:47,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 09:32:47,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400512163] [2023-08-30 09:32:47,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 09:32:47,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 09:32:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 09:32:47,842 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 09:32:47,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 09:32:47,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400512163] [2023-08-30 09:32:47,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400512163] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 09:32:47,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 09:32:47,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 09:32:47,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816469616] [2023-08-30 09:32:47,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 09:32:47,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 09:32:47,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 09:32:47,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 09:32:47,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-30 09:32:48,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 499 [2023-08-30 09:32:48,282 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 09:32:48,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 09:32:48,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 499 [2023-08-30 09:32:48,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 09:32:59,311 INFO L130 PetriNetUnfolder]: 95848/140568 cut-off events. [2023-08-30 09:32:59,311 INFO L131 PetriNetUnfolder]: For 119138/119138 co-relation queries the response was YES. [2023-08-30 09:32:59,974 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 09:33:00,403 INFO L137 encePairwiseOnDemand]: 482/499 looper letters, 443 selfloop transitions, 60 changer transitions 0/512 dead transitions. [2023-08-30 09:33:00,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 512 transitions, 2961 flow [2023-08-30 09:33:00,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 09:33:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 09:33:00,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2672 transitions. [2023-08-30 09:33:00,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354709418837675 [2023-08-30 09:33:00,411 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2672 transitions. [2023-08-30 09:33:00,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2672 transitions. [2023-08-30 09:33:00,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 09:33:00,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2672 transitions. [2023-08-30 09:33:00,418 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 09:33:00,425 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 09:33:00,426 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 09:33:00,426 INFO L175 Difference]: Start difference. First operand has 102 places, 127 transitions, 659 flow. Second operand 10 states and 2672 transitions. [2023-08-30 09:33:00,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 512 transitions, 2961 flow [2023-08-30 09:33:01,948 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 09:33:01,953 INFO L231 Difference]: Finished difference. Result has 117 places, 158 transitions, 1127 flow [2023-08-30 09:33:01,954 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 09:33:01,954 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 41 predicate places. [2023-08-30 09:33:01,955 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 158 transitions, 1127 flow [2023-08-30 09:33:01,955 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 09:33:01,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 09:33:01,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 09:33:01,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 09:33:01,956 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 09:33:01,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 09:33:01,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1787440568, now seen corresponding path program 1 times [2023-08-30 09:33:01,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 09:33:01,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608858714] [2023-08-30 09:33:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 09:33:01,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 09:33:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 09:33:02,143 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 09:33:02,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 09:33:02,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608858714] [2023-08-30 09:33:02,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608858714] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 09:33:02,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 09:33:02,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 09:33:02,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002109147] [2023-08-30 09:33:02,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 09:33:02,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 09:33:02,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 09:33:02,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 09:33:02,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 09:33:02,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 499 [2023-08-30 09:33:02,558 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 09:33:02,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 09:33:02,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 499 [2023-08-30 09:33:02,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 09:33:26,016 INFO L130 PetriNetUnfolder]: 183636/270934 cut-off events. [2023-08-30 09:33:26,017 INFO L131 PetriNetUnfolder]: For 506612/506612 co-relation queries the response was YES. [2023-08-30 09:33:27,126 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 09:33:28,201 INFO L137 encePairwiseOnDemand]: 483/499 looper letters, 774 selfloop transitions, 101 changer transitions 0/883 dead transitions. [2023-08-30 09:33:28,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 883 transitions, 7824 flow [2023-08-30 09:33:28,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 09:33:28,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 09:33:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2652 transitions. [2023-08-30 09:33:28,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314629258517034 [2023-08-30 09:33:28,207 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2652 transitions. [2023-08-30 09:33:28,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2652 transitions. [2023-08-30 09:33:28,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 09:33:28,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2652 transitions. [2023-08-30 09:33:28,213 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 09:33:28,219 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 09:33:28,220 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 09:33:28,221 INFO L175 Difference]: Start difference. First operand has 117 places, 158 transitions, 1127 flow. Second operand 10 states and 2652 transitions. [2023-08-30 09:33:28,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 883 transitions, 7824 flow [2023-08-30 09:33:30,532 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 09:33:30,537 INFO L231 Difference]: Finished difference. Result has 129 places, 281 transitions, 2578 flow [2023-08-30 09:33:30,537 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 09:33:30,538 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 53 predicate places. [2023-08-30 09:33:30,538 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 281 transitions, 2578 flow [2023-08-30 09:33:30,539 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 09:33:30,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 09:33:30,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 09:33:30,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 09:33:30,539 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 09:33:30,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 09:33:30,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1787440445, now seen corresponding path program 1 times [2023-08-30 09:33:30,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 09:33:30,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877289177] [2023-08-30 09:33:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 09:33:30,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 09:33:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 09:33:30,676 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 09:33:30,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 09:33:30,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877289177] [2023-08-30 09:33:30,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877289177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 09:33:30,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 09:33:30,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 09:33:30,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295006402] [2023-08-30 09:33:30,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 09:33:30,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 09:33:30,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 09:33:30,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 09:33:30,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 09:33:31,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 499 [2023-08-30 09:33:31,095 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 09:33:31,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 09:33:31,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 499 [2023-08-30 09:33:31,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 09:34:04,914 INFO L130 PetriNetUnfolder]: 224115/331999 cut-off events. [2023-08-30 09:34:04,915 INFO L131 PetriNetUnfolder]: For 863247/863247 co-relation queries the response was YES. [2023-08-30 09:34:06,747 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 09:34:07,954 INFO L137 encePairwiseOnDemand]: 482/499 looper letters, 817 selfloop transitions, 119 changer transitions 0/944 dead transitions. [2023-08-30 09:34:07,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 944 transitions, 9246 flow [2023-08-30 09:34:07,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 09:34:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 09:34:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2652 transitions. [2023-08-30 09:34:07,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314629258517034 [2023-08-30 09:34:07,960 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2652 transitions. [2023-08-30 09:34:07,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2652 transitions. [2023-08-30 09:34:07,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 09:34:07,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2652 transitions. [2023-08-30 09:34:07,965 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 09:34:07,971 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 09:34:07,972 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 09:34:07,972 INFO L175 Difference]: Start difference. First operand has 129 places, 281 transitions, 2578 flow. Second operand 10 states and 2652 transitions. [2023-08-30 09:34:07,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 944 transitions, 9246 flow [2023-08-30 09:34:16,623 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 09:34:16,630 INFO L231 Difference]: Finished difference. Result has 143 places, 333 transitions, 3566 flow [2023-08-30 09:34:16,631 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 09:34:16,631 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 67 predicate places. [2023-08-30 09:34:16,631 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 333 transitions, 3566 flow [2023-08-30 09:34:16,632 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 09:34:16,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 09:34:16,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 09:34:16,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 09:34:16,633 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 09:34:16,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 09:34:16,633 INFO L85 PathProgramCache]: Analyzing trace with hash 83267088, now seen corresponding path program 1 times [2023-08-30 09:34:16,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 09:34:16,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145938381] [2023-08-30 09:34:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 09:34:16,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 09:34:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 09:34:16,695 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 09:34:16,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 09:34:16,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145938381] [2023-08-30 09:34:16,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145938381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 09:34:16,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 09:34:16,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 09:34:16,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051376632] [2023-08-30 09:34:16,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 09:34:16,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 09:34:16,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 09:34:16,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 09:34:16,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 09:34:16,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 499 [2023-08-30 09:34:16,713 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 09:34:16,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 09:34:16,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 499 [2023-08-30 09:34:16,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 09:34:23,154 INFO L130 PetriNetUnfolder]: 40350/66506 cut-off events. [2023-08-30 09:34:23,154 INFO L131 PetriNetUnfolder]: For 225642/226208 co-relation queries the response was YES. [2023-08-30 09:34:23,721 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 09:34:23,986 INFO L137 encePairwiseOnDemand]: 489/499 looper letters, 224 selfloop transitions, 28 changer transitions 0/264 dead transitions. [2023-08-30 09:34:23,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 264 transitions, 2734 flow [2023-08-30 09:34:23,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 09:34:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 09:34:23,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 833 transitions. [2023-08-30 09:34:23,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564462257849031 [2023-08-30 09:34:23,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 833 transitions. [2023-08-30 09:34:23,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 833 transitions. [2023-08-30 09:34:23,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 09:34:23,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 833 transitions. [2023-08-30 09:34:23,990 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 09:34:23,992 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 09:34:23,992 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 09:34:23,992 INFO L175 Difference]: Start difference. First operand has 143 places, 333 transitions, 3566 flow. Second operand 3 states and 833 transitions. [2023-08-30 09:34:23,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 264 transitions, 2734 flow [2023-08-30 09:34:25,191 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 09:34:25,194 INFO L231 Difference]: Finished difference. Result has 141 places, 224 transitions, 1906 flow [2023-08-30 09:34:25,194 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 09:34:25,195 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 65 predicate places. [2023-08-30 09:34:25,195 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 224 transitions, 1906 flow [2023-08-30 09:34:25,195 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 09:34:25,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 09:34:25,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 09:34:25,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 09:34:25,196 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 09:34:25,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 09:34:25,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1284730054, now seen corresponding path program 1 times [2023-08-30 09:34:25,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 09:34:25,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639078586] [2023-08-30 09:34:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 09:34:25,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 09:34:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 09:34:25,240 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 09:34:25,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 09:34:25,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639078586] [2023-08-30 09:34:25,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639078586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 09:34:25,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860385162] [2023-08-30 09:34:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 09:34:25,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 09:34:25,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 09:34:25,247 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 09:34:25,253 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 09:34:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 09:34:25,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 09:34:25,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 09:34:25,456 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 09:34:25,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 09:34:25,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860385162] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 09:34:25,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 09:34:25,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 09:34:25,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622404546] [2023-08-30 09:34:25,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 09:34:25,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 09:34:25,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 09:34:25,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 09:34:25,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 09:34:25,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 499 [2023-08-30 09:34:25,483 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 09:34:25,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 09:34:25,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 499 [2023-08-30 09:34:25,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand