./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.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/goblint-regression/28-race_reach_19-callback_racing.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 a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --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 10:04:07,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 10:04:07,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 10:04:07,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 10:04:07,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 10:04:07,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 10:04:07,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 10:04:07,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 10:04:07,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 10:04:07,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 10:04:07,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 10:04:07,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 10:04:07,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 10:04:07,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 10:04:07,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 10:04:07,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 10:04:07,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 10:04:07,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 10:04:07,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 10:04:07,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 10:04:07,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 10:04:07,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 10:04:07,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 10:04:07,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 10:04:07,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 10:04:07,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 10:04:07,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 10:04:07,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 10:04:07,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 10:04:07,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 10:04:07,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 10:04:07,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 10:04:07,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 10:04:07,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 10:04:07,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 10:04:07,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 10:04:07,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 10:04:07,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 10:04:07,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 10:04:07,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 10:04:07,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 10:04:07,840 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 10:04:07,872 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 10:04:07,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 10:04:07,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 10:04:07,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 10:04:07,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 10:04:07,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 10:04:07,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 10:04:07,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 10:04:07,875 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 10:04:07,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 10:04:07,876 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 10:04:07,877 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 10:04:07,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 10:04:07,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 10:04:07,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 10:04:07,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 10:04:07,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 10:04:07,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 10:04:07,878 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 10:04:07,878 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 10:04:07,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 10:04:07,878 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 10:04:07,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 10:04:07,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 10:04:07,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 10:04:07,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 10:04:07,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 10:04:07,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 10:04:07,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 10:04:07,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 10:04:07,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 10:04:07,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 10:04:07,881 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 10:04:07,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 10:04:07,881 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 10:04:07,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 10:04:07,881 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 10:04:07,882 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 10:04:08,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 10:04:08,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 10:04:08,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 10:04:08,201 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 10:04:08,201 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 10:04:08,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-30 10:04:09,344 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 10:04:09,627 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 10:04:09,630 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-30 10:04:09,643 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28f6f2574/a9bfce41e3804c8eaec6de54218b054f/FLAG372617a5d [2023-08-30 10:04:09,654 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28f6f2574/a9bfce41e3804c8eaec6de54218b054f [2023-08-30 10:04:09,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 10:04:09,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 10:04:09,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 10:04:09,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 10:04:09,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 10:04:09,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:04:09" (1/1) ... [2023-08-30 10:04:09,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f1d117c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:09, skipping insertion in model container [2023-08-30 10:04:09,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:04:09" (1/1) ... [2023-08-30 10:04:09,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 10:04:09,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 10:04:09,982 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2023-08-30 10:04:10,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 10:04:10,029 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 10:04:10,066 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2023-08-30 10:04:10,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 10:04:10,125 WARN L667 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 10:04:10,131 INFO L208 MainTranslator]: Completed translation [2023-08-30 10:04:10,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:10 WrapperNode [2023-08-30 10:04:10,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 10:04:10,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 10:04:10,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 10:04:10,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 10:04:10,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:10" (1/1) ... [2023-08-30 10:04:10,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:10" (1/1) ... [2023-08-30 10:04:10,198 INFO L138 Inliner]: procedures = 173, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 144 [2023-08-30 10:04:10,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 10:04:10,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 10:04:10,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 10:04:10,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 10:04:10,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:10" (1/1) ... [2023-08-30 10:04:10,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:10" (1/1) ... [2023-08-30 10:04:10,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:10" (1/1) ... [2023-08-30 10:04:10,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:10" (1/1) ... [2023-08-30 10:04:10,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:10" (1/1) ... [2023-08-30 10:04:10,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:10" (1/1) ... [2023-08-30 10:04:10,243 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:10" (1/1) ... [2023-08-30 10:04:10,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:10" (1/1) ... [2023-08-30 10:04:10,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 10:04:10,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 10:04:10,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 10:04:10,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 10:04:10,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:10" (1/1) ... [2023-08-30 10:04:10,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 10:04:10,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:04:10,286 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 10:04:10,305 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 10:04:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 10:04:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 10:04:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 10:04:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 10:04:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 10:04:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 10:04:10,325 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 10:04:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 10:04:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 10:04:10,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 10:04:10,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 10:04:10,327 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 10:04:10,430 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 10:04:10,432 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 10:04:10,745 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 10:04:10,752 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 10:04:10,752 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-30 10:04:10,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:04:10 BoogieIcfgContainer [2023-08-30 10:04:10,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 10:04:10,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 10:04:10,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 10:04:10,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 10:04:10,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:04:09" (1/3) ... [2023-08-30 10:04:10,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496c6a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:04:10, skipping insertion in model container [2023-08-30 10:04:10,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:10" (2/3) ... [2023-08-30 10:04:10,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496c6a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:04:10, skipping insertion in model container [2023-08-30 10:04:10,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:04:10" (3/3) ... [2023-08-30 10:04:10,763 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-08-30 10:04:10,770 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 10:04:10,778 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 10:04:10,778 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 10:04:10,778 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 10:04:10,832 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 10:04:10,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 154 transitions, 316 flow [2023-08-30 10:04:10,938 INFO L130 PetriNetUnfolder]: 26/236 cut-off events. [2023-08-30 10:04:10,944 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:04:10,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 236 events. 26/236 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 692 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2023-08-30 10:04:10,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 154 transitions, 316 flow [2023-08-30 10:04:10,963 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 151 transitions, 310 flow [2023-08-30 10:04:10,969 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:04:10,977 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 151 transitions, 310 flow [2023-08-30 10:04:10,980 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 151 transitions, 310 flow [2023-08-30 10:04:10,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 151 transitions, 310 flow [2023-08-30 10:04:11,029 INFO L130 PetriNetUnfolder]: 25/233 cut-off events. [2023-08-30 10:04:11,030 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:04:11,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 233 events. 25/233 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 677 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2023-08-30 10:04:11,033 INFO L119 LiptonReduction]: Number of co-enabled transitions 3496 [2023-08-30 10:04:14,437 INFO L134 LiptonReduction]: Checked pairs total: 4691 [2023-08-30 10:04:14,437 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-30 10:04:14,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:04:14,456 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;@6eb81b07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:04:14,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 10:04:14,460 INFO L130 PetriNetUnfolder]: 2/10 cut-off events. [2023-08-30 10:04:14,460 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:04:14,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:14,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 10:04:14,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:14,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:14,466 INFO L85 PathProgramCache]: Analyzing trace with hash 17346251, now seen corresponding path program 1 times [2023-08-30 10:04:14,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:14,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671918301] [2023-08-30 10:04:14,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:14,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:14,669 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 10:04:14,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:14,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671918301] [2023-08-30 10:04:14,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671918301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:04:14,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:04:14,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:04:14,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118726685] [2023-08-30 10:04:14,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:04:14,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:04:14,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:04:14,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:04:14,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 293 [2023-08-30 10:04:14,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 45 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 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 10:04:14,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:14,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 293 [2023-08-30 10:04:14,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:14,808 INFO L130 PetriNetUnfolder]: 78/189 cut-off events. [2023-08-30 10:04:14,808 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:04:14,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 189 events. 78/189 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 758 event pairs, 0 based on Foata normal form. 23/171 useless extension candidates. Maximal degree in co-relation 345. Up to 167 conditions per place. [2023-08-30 10:04:14,811 INFO L137 encePairwiseOnDemand]: 278/293 looper letters, 30 selfloop transitions, 2 changer transitions 2/37 dead transitions. [2023-08-30 10:04:14,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 148 flow [2023-08-30 10:04:14,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:04:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:04:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-30 10:04:14,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164960182025028 [2023-08-30 10:04:14,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-30 10:04:14,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-30 10:04:14,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:14,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-30 10:04:14,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 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 10:04:14,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 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 10:04:14,839 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 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 10:04:14,841 INFO L175 Difference]: Start difference. First operand has 37 places, 45 transitions, 98 flow. Second operand 3 states and 454 transitions. [2023-08-30 10:04:14,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 148 flow [2023-08-30 10:04:14,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:04:14,846 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 76 flow [2023-08-30 10:04:14,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-30 10:04:14,851 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-08-30 10:04:14,851 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 76 flow [2023-08-30 10:04:14,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 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 10:04:14,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:14,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:04:14,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 10:04:14,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:14,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:14,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1367909153, now seen corresponding path program 1 times [2023-08-30 10:04:14,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:14,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262024635] [2023-08-30 10:04:14,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:14,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:14,969 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 10:04:14,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:14,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262024635] [2023-08-30 10:04:14,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262024635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:04:14,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117886560] [2023-08-30 10:04:14,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:14,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:14,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:04:14,973 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 10:04:14,978 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 10:04:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:15,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 10:04:15,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:04:15,107 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 10:04:15,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:04:15,124 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 10:04:15,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117886560] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:04:15,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:04:15,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 10:04:15,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533418366] [2023-08-30 10:04:15,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:04:15,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:04:15,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:15,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:04:15,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 10:04:15,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 293 [2023-08-30 10:04:15,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 136.14285714285714) internal successors, (953), 7 states have internal predecessors, (953), 0 states have call successors, (0), 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 10:04:15,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:15,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 293 [2023-08-30 10:04:15,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:15,168 INFO L130 PetriNetUnfolder]: 8/26 cut-off events. [2023-08-30 10:04:15,169 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 10:04:15,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 26 events. 8/26 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 3 based on Foata normal form. 5/31 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2023-08-30 10:04:15,169 INFO L137 encePairwiseOnDemand]: 290/293 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2023-08-30 10:04:15,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 14 transitions, 63 flow [2023-08-30 10:04:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:04:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:04:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2023-08-30 10:04:15,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46928327645051193 [2023-08-30 10:04:15,173 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2023-08-30 10:04:15,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2023-08-30 10:04:15,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:15,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2023-08-30 10:04:15,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 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 10:04:15,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 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 10:04:15,178 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 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 10:04:15,178 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 76 flow. Second operand 4 states and 550 transitions. [2023-08-30 10:04:15,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 14 transitions, 63 flow [2023-08-30 10:04:15,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 14 transitions, 57 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 10:04:15,179 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-30 10:04:15,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-30 10:04:15,180 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -22 predicate places. [2023-08-30 10:04:15,180 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-30 10:04:15,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 136.14285714285714) internal successors, (953), 7 states have internal predecessors, (953), 0 states have call successors, (0), 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 10:04:15,183 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2023-08-30 10:04:15,184 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2023-08-30 10:04:15,184 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2023-08-30 10:04:15,184 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2023-08-30 10:04:15,184 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2023-08-30 10:04:15,185 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2023-08-30 10:04:15,185 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2023-08-30 10:04:15,185 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2023-08-30 10:04:15,185 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2023-08-30 10:04:15,186 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2023-08-30 10:04:15,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 10:04:15,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:15,391 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 10:04:15,393 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:04:15,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 154 transitions, 316 flow [2023-08-30 10:04:15,417 INFO L130 PetriNetUnfolder]: 26/236 cut-off events. [2023-08-30 10:04:15,418 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:04:15,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 236 events. 26/236 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 692 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2023-08-30 10:04:15,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 154 transitions, 316 flow [2023-08-30 10:04:15,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 145 transitions, 295 flow [2023-08-30 10:04:15,422 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:04:15,423 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 145 transitions, 295 flow [2023-08-30 10:04:15,423 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 145 transitions, 295 flow [2023-08-30 10:04:15,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 145 transitions, 295 flow [2023-08-30 10:04:15,440 INFO L130 PetriNetUnfolder]: 25/227 cut-off events. [2023-08-30 10:04:15,440 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:04:15,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 227 events. 25/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 624 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2023-08-30 10:04:15,445 INFO L119 LiptonReduction]: Number of co-enabled transitions 3496 [2023-08-30 10:04:18,637 INFO L134 LiptonReduction]: Checked pairs total: 4566 [2023-08-30 10:04:18,638 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-08-30 10:04:18,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:04:18,641 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;@6eb81b07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:04:18,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:04:18,644 INFO L130 PetriNetUnfolder]: 5/31 cut-off events. [2023-08-30 10:04:18,644 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:04:18,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:18,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 10:04:18,645 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:04:18,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:18,645 INFO L85 PathProgramCache]: Analyzing trace with hash -843908194, now seen corresponding path program 1 times [2023-08-30 10:04:18,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:18,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978576960] [2023-08-30 10:04:18,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:18,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:04:18,667 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:04:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:04:18,691 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:04:18,691 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:04:18,692 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:04:18,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 10:04:18,692 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:04:18,693 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:04:18,693 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:04:18,693 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 10:04:18,715 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 10:04:18,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 175 transitions, 368 flow [2023-08-30 10:04:18,746 INFO L130 PetriNetUnfolder]: 43/375 cut-off events. [2023-08-30 10:04:18,746 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:04:18,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 375 events. 43/375 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1407 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 238. Up to 9 conditions per place. [2023-08-30 10:04:18,748 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 175 transitions, 368 flow [2023-08-30 10:04:18,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 175 transitions, 368 flow [2023-08-30 10:04:18,750 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:04:18,750 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 175 transitions, 368 flow [2023-08-30 10:04:18,751 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 175 transitions, 368 flow [2023-08-30 10:04:18,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 175 transitions, 368 flow [2023-08-30 10:04:18,778 INFO L130 PetriNetUnfolder]: 43/375 cut-off events. [2023-08-30 10:04:18,778 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:04:18,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 375 events. 43/375 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1407 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 238. Up to 9 conditions per place. [2023-08-30 10:04:18,784 INFO L119 LiptonReduction]: Number of co-enabled transitions 8436 [2023-08-30 10:04:21,947 INFO L134 LiptonReduction]: Checked pairs total: 13176 [2023-08-30 10:04:21,948 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-08-30 10:04:21,950 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:04:21,951 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;@6eb81b07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:04:21,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 10:04:21,953 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-30 10:04:21,953 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:04:21,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:21,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 10:04:21,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:21,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:21,954 INFO L85 PathProgramCache]: Analyzing trace with hash 32182856, now seen corresponding path program 1 times [2023-08-30 10:04:21,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:21,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275726487] [2023-08-30 10:04:21,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:21,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:21,981 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 10:04:21,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:21,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275726487] [2023-08-30 10:04:21,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275726487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:04:21,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:04:21,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:04:21,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087825399] [2023-08-30 10:04:21,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:04:21,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:04:21,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:21,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:04:21,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:04:21,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 327 [2023-08-30 10:04:21,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 58 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 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 10:04:21,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:21,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 327 [2023-08-30 10:04:21,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:22,267 INFO L130 PetriNetUnfolder]: 1795/2981 cut-off events. [2023-08-30 10:04:22,267 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2023-08-30 10:04:22,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5961 conditions, 2981 events. 1795/2981 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16150 event pairs, 765 based on Foata normal form. 204/2462 useless extension candidates. Maximal degree in co-relation 1049. Up to 2916 conditions per place. [2023-08-30 10:04:22,281 INFO L137 encePairwiseOnDemand]: 311/327 looper letters, 47 selfloop transitions, 2 changer transitions 2/55 dead transitions. [2023-08-30 10:04:22,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 228 flow [2023-08-30 10:04:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:04:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:04:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-30 10:04:22,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527013251783894 [2023-08-30 10:04:22,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-30 10:04:22,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-30 10:04:22,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:22,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-30 10:04:22,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 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 10:04:22,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 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 10:04:22,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 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 10:04:22,292 INFO L175 Difference]: Start difference. First operand has 48 places, 58 transitions, 134 flow. Second operand 3 states and 517 transitions. [2023-08-30 10:04:22,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 228 flow [2023-08-30 10:04:22,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:04:22,296 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 120 flow [2023-08-30 10:04:22,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-30 10:04:22,299 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2023-08-30 10:04:22,299 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 120 flow [2023-08-30 10:04:22,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 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 10:04:22,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:22,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:04:22,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 10:04:22,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:22,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:22,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1811918124, now seen corresponding path program 1 times [2023-08-30 10:04:22,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:22,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803928605] [2023-08-30 10:04:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:22,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:22,351 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 10:04:22,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:22,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803928605] [2023-08-30 10:04:22,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803928605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:04:22,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898060174] [2023-08-30 10:04:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:22,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:22,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:04:22,354 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:04:22,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 10:04:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:22,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 10:04:22,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:04:22,435 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 10:04:22,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:04:22,449 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 10:04:22,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898060174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:04:22,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:04:22,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 10:04:22,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141813861] [2023-08-30 10:04:22,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:04:22,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:04:22,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:22,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:04:22,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 10:04:22,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 327 [2023-08-30 10:04:22,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 120 flow. Second operand has 7 states, 7 states have (on average 151.14285714285714) internal successors, (1058), 7 states have internal predecessors, (1058), 0 states have call successors, (0), 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 10:04:22,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:22,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 327 [2023-08-30 10:04:22,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:22,579 INFO L130 PetriNetUnfolder]: 261/460 cut-off events. [2023-08-30 10:04:22,580 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-30 10:04:22,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1040 conditions, 460 events. 261/460 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1820 event pairs, 0 based on Foata normal form. 49/439 useless extension candidates. Maximal degree in co-relation 200. Up to 226 conditions per place. [2023-08-30 10:04:22,582 INFO L137 encePairwiseOnDemand]: 322/327 looper letters, 32 selfloop transitions, 3 changer transitions 13/49 dead transitions. [2023-08-30 10:04:22,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 49 transitions, 212 flow [2023-08-30 10:04:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 10:04:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 10:04:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 945 transitions. [2023-08-30 10:04:22,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.481651376146789 [2023-08-30 10:04:22,585 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 945 transitions. [2023-08-30 10:04:22,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 945 transitions. [2023-08-30 10:04:22,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:22,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 945 transitions. [2023-08-30 10:04:22,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.5) internal successors, (945), 6 states have internal predecessors, (945), 0 states have call successors, (0), 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 10:04:22,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 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 10:04:22,592 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 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 10:04:22,592 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 120 flow. Second operand 6 states and 945 transitions. [2023-08-30 10:04:22,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 49 transitions, 212 flow [2023-08-30 10:04:22,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 49 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:04:22,593 INFO L231 Difference]: Finished difference. Result has 30 places, 18 transitions, 56 flow [2023-08-30 10:04:22,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=56, PETRI_PLACES=30, PETRI_TRANSITIONS=18} [2023-08-30 10:04:22,594 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -18 predicate places. [2023-08-30 10:04:22,595 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 18 transitions, 56 flow [2023-08-30 10:04:22,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 151.14285714285714) internal successors, (1058), 7 states have internal predecessors, (1058), 0 states have call successors, (0), 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 10:04:22,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:22,596 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:04:22,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 10:04:22,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:22,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:22,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash 334936288, now seen corresponding path program 1 times [2023-08-30 10:04:22,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:22,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785054781] [2023-08-30 10:04:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:22,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:22,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:22,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785054781] [2023-08-30 10:04:22,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785054781] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:04:22,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:04:22,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:04:22,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330665129] [2023-08-30 10:04:22,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:04:22,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:04:22,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:22,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:04:22,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:04:22,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 327 [2023-08-30 10:04:22,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 18 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 10:04:22,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:22,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 327 [2023-08-30 10:04:22,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:22,896 INFO L130 PetriNetUnfolder]: 48/119 cut-off events. [2023-08-30 10:04:22,896 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-08-30 10:04:22,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 119 events. 48/119 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 361 event pairs, 48 based on Foata normal form. 42/151 useless extension candidates. Maximal degree in co-relation 220. Up to 113 conditions per place. [2023-08-30 10:04:22,897 INFO L137 encePairwiseOnDemand]: 325/327 looper letters, 0 selfloop transitions, 0 changer transitions 17/17 dead transitions. [2023-08-30 10:04:22,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 17 transitions, 82 flow [2023-08-30 10:04:22,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:04:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:04:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-30 10:04:22,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47604485219164117 [2023-08-30 10:04:22,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-30 10:04:22,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-30 10:04:22,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:22,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-30 10:04:22,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 10:04:22,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 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 10:04:22,905 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 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 10:04:22,905 INFO L175 Difference]: Start difference. First operand has 30 places, 18 transitions, 56 flow. Second operand 3 states and 467 transitions. [2023-08-30 10:04:22,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 17 transitions, 82 flow [2023-08-30 10:04:22,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 10:04:22,906 INFO L231 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2023-08-30 10:04:22,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=25, PETRI_TRANSITIONS=0} [2023-08-30 10:04:22,908 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -23 predicate places. [2023-08-30 10:04:22,908 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2023-08-30 10:04:22,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 10:04:22,909 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2023-08-30 10:04:22,909 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2023-08-30 10:04:22,909 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2023-08-30 10:04:22,909 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2023-08-30 10:04:22,909 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2023-08-30 10:04:22,910 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2023-08-30 10:04:22,910 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2023-08-30 10:04:22,910 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2023-08-30 10:04:22,910 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2023-08-30 10:04:22,910 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2023-08-30 10:04:22,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 10:04:22,911 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 10:04:22,911 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:04:22,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 175 transitions, 368 flow [2023-08-30 10:04:22,945 INFO L130 PetriNetUnfolder]: 43/375 cut-off events. [2023-08-30 10:04:22,945 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:04:22,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 375 events. 43/375 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1407 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 238. Up to 9 conditions per place. [2023-08-30 10:04:22,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 175 transitions, 368 flow [2023-08-30 10:04:22,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 175 transitions, 368 flow [2023-08-30 10:04:22,948 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:04:22,948 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 175 transitions, 368 flow [2023-08-30 10:04:22,949 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 175 transitions, 368 flow [2023-08-30 10:04:22,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 175 transitions, 368 flow [2023-08-30 10:04:22,971 INFO L130 PetriNetUnfolder]: 43/375 cut-off events. [2023-08-30 10:04:22,972 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:04:22,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 375 events. 43/375 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1407 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 238. Up to 9 conditions per place. [2023-08-30 10:04:22,978 INFO L119 LiptonReduction]: Number of co-enabled transitions 8436 [2023-08-30 10:04:26,020 INFO L134 LiptonReduction]: Checked pairs total: 14361 [2023-08-30 10:04:26,020 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-08-30 10:04:26,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:04:26,023 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;@6eb81b07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:04:26,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:04:26,028 INFO L130 PetriNetUnfolder]: 22/89 cut-off events. [2023-08-30 10:04:26,029 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 10:04:26,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:26,029 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 10:04:26,029 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:04:26,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:26,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1170578561, now seen corresponding path program 1 times [2023-08-30 10:04:26,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:26,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142721417] [2023-08-30 10:04:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:26,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:04:26,047 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:04:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:04:26,059 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:04:26,060 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:04:26,060 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:04:26,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 10:04:26,060 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:04:26,061 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:04:26,061 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:04:26,061 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 10:04:26,074 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 10:04:26,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 196 transitions, 422 flow [2023-08-30 10:04:26,114 INFO L130 PetriNetUnfolder]: 65/553 cut-off events. [2023-08-30 10:04:26,115 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 10:04:26,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 553 events. 65/553 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2297 event pairs, 1 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 383. Up to 16 conditions per place. [2023-08-30 10:04:26,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 196 transitions, 422 flow [2023-08-30 10:04:26,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 196 transitions, 422 flow [2023-08-30 10:04:26,120 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:04:26,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 196 transitions, 422 flow [2023-08-30 10:04:26,121 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 196 transitions, 422 flow [2023-08-30 10:04:26,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 196 transitions, 422 flow [2023-08-30 10:04:26,164 INFO L130 PetriNetUnfolder]: 65/553 cut-off events. [2023-08-30 10:04:26,164 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 10:04:26,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 553 events. 65/553 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2297 event pairs, 1 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 383. Up to 16 conditions per place. [2023-08-30 10:04:26,178 INFO L119 LiptonReduction]: Number of co-enabled transitions 13908 [2023-08-30 10:04:29,099 INFO L134 LiptonReduction]: Checked pairs total: 21649 [2023-08-30 10:04:29,099 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-30 10:04:29,100 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:04:29,101 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;@6eb81b07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:04:29,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 10:04:29,102 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-30 10:04:29,102 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:04:29,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:29,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 10:04:29,103 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:29,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:29,103 INFO L85 PathProgramCache]: Analyzing trace with hash 48620392, now seen corresponding path program 1 times [2023-08-30 10:04:29,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:29,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089171521] [2023-08-30 10:04:29,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:29,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:29,147 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 10:04:29,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:29,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089171521] [2023-08-30 10:04:29,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089171521] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:04:29,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:04:29,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:04:29,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882296248] [2023-08-30 10:04:29,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:04:29,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:04:29,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:29,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:04:29,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:04:29,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 362 [2023-08-30 10:04:29,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 69 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 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 10:04:29,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:29,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 362 [2023-08-30 10:04:29,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:30,689 INFO L130 PetriNetUnfolder]: 13999/20253 cut-off events. [2023-08-30 10:04:30,689 INFO L131 PetriNetUnfolder]: For 514/514 co-relation queries the response was YES. [2023-08-30 10:04:30,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40633 conditions, 20253 events. 13999/20253 cut-off events. For 514/514 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 121754 event pairs, 8909 based on Foata normal form. 2116/18598 useless extension candidates. Maximal degree in co-relation 5942. Up to 20026 conditions per place. [2023-08-30 10:04:30,794 INFO L137 encePairwiseOnDemand]: 343/362 looper letters, 51 selfloop transitions, 2 changer transitions 2/60 dead transitions. [2023-08-30 10:04:30,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 258 flow [2023-08-30 10:04:30,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:04:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:04:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2023-08-30 10:04:30,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5239410681399632 [2023-08-30 10:04:30,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2023-08-30 10:04:30,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2023-08-30 10:04:30,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:30,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2023-08-30 10:04:30,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 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 10:04:30,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 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 10:04:30,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 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 10:04:30,801 INFO L175 Difference]: Start difference. First operand has 57 places, 69 transitions, 168 flow. Second operand 3 states and 569 transitions. [2023-08-30 10:04:30,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 258 flow [2023-08-30 10:04:30,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 258 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:04:30,805 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 144 flow [2023-08-30 10:04:30,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2023-08-30 10:04:30,807 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-08-30 10:04:30,807 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 144 flow [2023-08-30 10:04:30,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 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 10:04:30,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:30,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:04:30,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 10:04:30,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:30,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:30,809 INFO L85 PathProgramCache]: Analyzing trace with hash -957482156, now seen corresponding path program 1 times [2023-08-30 10:04:30,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:30,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546637101] [2023-08-30 10:04:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:30,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:30,851 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 10:04:30,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:30,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546637101] [2023-08-30 10:04:30,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546637101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:04:30,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982794363] [2023-08-30 10:04:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:30,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:30,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:04:30,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:04:30,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 10:04:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:30,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 10:04:30,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:04:30,929 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 10:04:30,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:04:30,950 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 10:04:30,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982794363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:04:30,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:04:30,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 10:04:30,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624905637] [2023-08-30 10:04:30,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:04:30,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:04:30,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:30,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:04:30,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 10:04:30,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 362 [2023-08-30 10:04:30,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 144 flow. Second operand has 7 states, 7 states have (on average 166.14285714285714) internal successors, (1163), 7 states have internal predecessors, (1163), 0 states have call successors, (0), 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 10:04:30,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:30,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 362 [2023-08-30 10:04:30,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:31,300 INFO L130 PetriNetUnfolder]: 2091/3105 cut-off events. [2023-08-30 10:04:31,301 INFO L131 PetriNetUnfolder]: For 340/340 co-relation queries the response was YES. [2023-08-30 10:04:31,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6808 conditions, 3105 events. 2091/3105 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14887 event pairs, 0 based on Foata normal form. 245/2990 useless extension candidates. Maximal degree in co-relation 1431. Up to 1466 conditions per place. [2023-08-30 10:04:31,313 INFO L137 encePairwiseOnDemand]: 357/362 looper letters, 49 selfloop transitions, 5 changer transitions 17/73 dead transitions. [2023-08-30 10:04:31,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 73 transitions, 317 flow [2023-08-30 10:04:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:04:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:04:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1224 transitions. [2023-08-30 10:04:31,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48303078137332284 [2023-08-30 10:04:31,317 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1224 transitions. [2023-08-30 10:04:31,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1224 transitions. [2023-08-30 10:04:31,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:31,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1224 transitions. [2023-08-30 10:04:31,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 174.85714285714286) internal successors, (1224), 7 states have internal predecessors, (1224), 0 states have call successors, (0), 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 10:04:31,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 362.0) internal successors, (2896), 8 states have internal predecessors, (2896), 0 states have call successors, (0), 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 10:04:31,325 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 362.0) internal successors, (2896), 8 states have internal predecessors, (2896), 0 states have call successors, (0), 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 10:04:31,325 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 144 flow. Second operand 7 states and 1224 transitions. [2023-08-30 10:04:31,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 73 transitions, 317 flow [2023-08-30 10:04:31,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 73 transitions, 313 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 10:04:31,330 INFO L231 Difference]: Finished difference. Result has 39 places, 26 transitions, 85 flow [2023-08-30 10:04:31,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=85, PETRI_PLACES=39, PETRI_TRANSITIONS=26} [2023-08-30 10:04:31,331 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -18 predicate places. [2023-08-30 10:04:31,332 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 26 transitions, 85 flow [2023-08-30 10:04:31,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.14285714285714) internal successors, (1163), 7 states have internal predecessors, (1163), 0 states have call successors, (0), 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 10:04:31,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:31,332 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:04:31,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 10:04:31,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:31,538 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:31,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:31,539 INFO L85 PathProgramCache]: Analyzing trace with hash 382713583, now seen corresponding path program 1 times [2023-08-30 10:04:31,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:31,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551079337] [2023-08-30 10:04:31,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:31,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:31,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:31,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551079337] [2023-08-30 10:04:31,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551079337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:04:31,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326093507] [2023-08-30 10:04:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:31,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:31,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:04:31,590 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:04:31,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 10:04:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 10:04:31,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:04:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:31,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:04:31,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326093507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:04:31,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:04:31,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-30 10:04:31,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452638783] [2023-08-30 10:04:31,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:04:31,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:04:31,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:31,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:04:31,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 10:04:31,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 362 [2023-08-30 10:04:31,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 26 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 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 10:04:31,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:31,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 362 [2023-08-30 10:04:31,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:31,778 INFO L130 PetriNetUnfolder]: 473/817 cut-off events. [2023-08-30 10:04:31,779 INFO L131 PetriNetUnfolder]: For 820/820 co-relation queries the response was YES. [2023-08-30 10:04:31,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1793 conditions, 817 events. 473/817 cut-off events. For 820/820 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3538 event pairs, 225 based on Foata normal form. 210/997 useless extension candidates. Maximal degree in co-relation 570. Up to 783 conditions per place. [2023-08-30 10:04:31,781 INFO L137 encePairwiseOnDemand]: 359/362 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2023-08-30 10:04:31,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 29 transitions, 137 flow [2023-08-30 10:04:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:04:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:04:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 688 transitions. [2023-08-30 10:04:31,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47513812154696133 [2023-08-30 10:04:31,784 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 688 transitions. [2023-08-30 10:04:31,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 688 transitions. [2023-08-30 10:04:31,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:31,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 688 transitions. [2023-08-30 10:04:31,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 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 10:04:31,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 362.0) internal successors, (1810), 5 states have internal predecessors, (1810), 0 states have call successors, (0), 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 10:04:31,789 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 362.0) internal successors, (1810), 5 states have internal predecessors, (1810), 0 states have call successors, (0), 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 10:04:31,789 INFO L175 Difference]: Start difference. First operand has 39 places, 26 transitions, 85 flow. Second operand 4 states and 688 transitions. [2023-08-30 10:04:31,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 29 transitions, 137 flow [2023-08-30 10:04:31,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 129 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 10:04:31,790 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2023-08-30 10:04:31,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2023-08-30 10:04:31,791 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -22 predicate places. [2023-08-30 10:04:31,791 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2023-08-30 10:04:31,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 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 10:04:31,792 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2023-08-30 10:04:31,792 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2023-08-30 10:04:31,792 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2023-08-30 10:04:31,793 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2023-08-30 10:04:31,793 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2023-08-30 10:04:31,793 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2023-08-30 10:04:31,793 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2023-08-30 10:04:31,793 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2023-08-30 10:04:31,794 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2023-08-30 10:04:31,794 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2023-08-30 10:04:31,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 10:04:32,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:32,009 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 10:04:32,009 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:04:32,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 196 transitions, 422 flow [2023-08-30 10:04:32,062 INFO L130 PetriNetUnfolder]: 65/553 cut-off events. [2023-08-30 10:04:32,062 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 10:04:32,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 553 events. 65/553 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2297 event pairs, 1 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 383. Up to 16 conditions per place. [2023-08-30 10:04:32,065 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 196 transitions, 422 flow [2023-08-30 10:04:32,067 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 196 transitions, 422 flow [2023-08-30 10:04:32,067 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:04:32,067 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 196 transitions, 422 flow [2023-08-30 10:04:32,067 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 196 transitions, 422 flow [2023-08-30 10:04:32,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 196 transitions, 422 flow [2023-08-30 10:04:32,110 INFO L130 PetriNetUnfolder]: 65/553 cut-off events. [2023-08-30 10:04:32,111 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 10:04:32,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 553 events. 65/553 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2297 event pairs, 1 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 383. Up to 16 conditions per place. [2023-08-30 10:04:32,123 INFO L119 LiptonReduction]: Number of co-enabled transitions 13908 [2023-08-30 10:04:35,081 INFO L134 LiptonReduction]: Checked pairs total: 22090 [2023-08-30 10:04:35,082 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-30 10:04:35,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:04:35,083 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;@6eb81b07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:04:35,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:04:35,089 INFO L130 PetriNetUnfolder]: 28/126 cut-off events. [2023-08-30 10:04:35,089 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 10:04:35,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:35,090 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 10:04:35,090 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:04:35,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:35,090 INFO L85 PathProgramCache]: Analyzing trace with hash -952332422, now seen corresponding path program 1 times [2023-08-30 10:04:35,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:35,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046781643] [2023-08-30 10:04:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:35,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:04:35,107 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:04:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:04:35,119 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:04:35,119 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:04:35,119 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:04:35,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 10:04:35,120 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:04:35,120 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:04:35,120 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:04:35,120 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 10:04:35,138 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 10:04:35,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 217 transitions, 478 flow [2023-08-30 10:04:35,207 INFO L130 PetriNetUnfolder]: 99/811 cut-off events. [2023-08-30 10:04:35,207 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 10:04:35,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 811 events. 99/811 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3715 event pairs, 6 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 573. Up to 32 conditions per place. [2023-08-30 10:04:35,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 217 transitions, 478 flow [2023-08-30 10:04:35,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 217 transitions, 478 flow [2023-08-30 10:04:35,215 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:04:35,215 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 217 transitions, 478 flow [2023-08-30 10:04:35,216 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 217 transitions, 478 flow [2023-08-30 10:04:35,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 217 transitions, 478 flow [2023-08-30 10:04:35,289 INFO L130 PetriNetUnfolder]: 99/811 cut-off events. [2023-08-30 10:04:35,289 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 10:04:35,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 811 events. 99/811 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3715 event pairs, 6 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 573. Up to 32 conditions per place. [2023-08-30 10:04:35,304 INFO L119 LiptonReduction]: Number of co-enabled transitions 20216 [2023-08-30 10:04:38,651 INFO L134 LiptonReduction]: Checked pairs total: 37100 [2023-08-30 10:04:38,651 INFO L136 LiptonReduction]: Total number of compositions: 182 [2023-08-30 10:04:38,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:04:38,654 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;@6eb81b07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:04:38,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 10:04:38,655 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-30 10:04:38,655 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:04:38,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:38,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 10:04:38,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:38,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash 66690501, now seen corresponding path program 1 times [2023-08-30 10:04:38,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:38,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169154102] [2023-08-30 10:04:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:38,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:38,675 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 10:04:38,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:38,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169154102] [2023-08-30 10:04:38,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169154102] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:04:38,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:04:38,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:04:38,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673167142] [2023-08-30 10:04:38,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:04:38,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:04:38,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:38,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:04:38,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:04:38,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 399 [2023-08-30 10:04:38,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 82 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 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 10:04:38,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:38,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 399 [2023-08-30 10:04:38,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:48,621 INFO L130 PetriNetUnfolder]: 119924/168063 cut-off events. [2023-08-30 10:04:48,621 INFO L131 PetriNetUnfolder]: For 6588/6588 co-relation queries the response was YES. [2023-08-30 10:04:48,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330892 conditions, 168063 events. 119924/168063 cut-off events. For 6588/6588 co-relation queries the response was YES. Maximal size of possible extension queue 5577. Compared 1267706 event pairs, 84364 based on Foata normal form. 32729/162715 useless extension candidates. Maximal degree in co-relation 50601. Up to 159047 conditions per place. [2023-08-30 10:04:49,423 INFO L137 encePairwiseOnDemand]: 376/399 looper letters, 60 selfloop transitions, 2 changer transitions 2/71 dead transitions. [2023-08-30 10:04:49,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 71 transitions, 312 flow [2023-08-30 10:04:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:04:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:04:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-30 10:04:49,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2023-08-30 10:04:49,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-30 10:04:49,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-30 10:04:49,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:49,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-30 10:04:49,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 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 10:04:49,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 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 10:04:49,431 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 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 10:04:49,431 INFO L175 Difference]: Start difference. First operand has 67 places, 82 transitions, 208 flow. Second operand 3 states and 627 transitions. [2023-08-30 10:04:49,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 71 transitions, 312 flow [2023-08-30 10:04:49,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 71 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:04:49,436 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 174 flow [2023-08-30 10:04:49,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2023-08-30 10:04:49,437 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 2 predicate places. [2023-08-30 10:04:49,437 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 174 flow [2023-08-30 10:04:49,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 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 10:04:49,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:49,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:04:49,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 10:04:49,438 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:49,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:49,438 INFO L85 PathProgramCache]: Analyzing trace with hash 922261475, now seen corresponding path program 1 times [2023-08-30 10:04:49,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:49,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806750347] [2023-08-30 10:04:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:49,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:49,471 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 10:04:49,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:49,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806750347] [2023-08-30 10:04:49,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806750347] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:04:49,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193447645] [2023-08-30 10:04:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:49,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:49,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:04:49,473 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:04:49,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 10:04:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:49,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 10:04:49,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:04:49,562 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 10:04:49,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:04:49,581 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 10:04:49,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193447645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:04:49,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:04:49,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 10:04:49,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029242321] [2023-08-30 10:04:49,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:04:49,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:04:49,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:49,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:04:49,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 10:04:49,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 399 [2023-08-30 10:04:49,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 181.14285714285714) internal successors, (1268), 7 states have internal predecessors, (1268), 0 states have call successors, (0), 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 10:04:49,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:49,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 399 [2023-08-30 10:04:49,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:56,381 INFO L130 PetriNetUnfolder]: 97849/133362 cut-off events. [2023-08-30 10:04:56,381 INFO L131 PetriNetUnfolder]: For 4494/4494 co-relation queries the response was YES. [2023-08-30 10:04:56,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269379 conditions, 133362 events. 97849/133362 cut-off events. For 4494/4494 co-relation queries the response was YES. Maximal size of possible extension queue 4413. Compared 920395 event pairs, 1245 based on Foata normal form. 301/107151 useless extension candidates. Maximal degree in co-relation 46747. Up to 110296 conditions per place. [2023-08-30 10:04:56,953 INFO L137 encePairwiseOnDemand]: 393/399 looper letters, 127 selfloop transitions, 8 changer transitions 1/143 dead transitions. [2023-08-30 10:04:56,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 143 transitions, 614 flow [2023-08-30 10:04:56,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:04:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:04:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1395 transitions. [2023-08-30 10:04:56,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49946294307196565 [2023-08-30 10:04:56,957 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1395 transitions. [2023-08-30 10:04:56,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1395 transitions. [2023-08-30 10:04:56,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:56,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1395 transitions. [2023-08-30 10:04:56,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.28571428571428) internal successors, (1395), 7 states have internal predecessors, (1395), 0 states have call successors, (0), 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 10:04:56,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 399.0) internal successors, (3192), 8 states have internal predecessors, (3192), 0 states have call successors, (0), 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 10:04:56,965 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 399.0) internal successors, (3192), 8 states have internal predecessors, (3192), 0 states have call successors, (0), 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 10:04:56,965 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 174 flow. Second operand 7 states and 1395 transitions. [2023-08-30 10:04:56,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 143 transitions, 614 flow [2023-08-30 10:04:56,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 143 transitions, 610 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:04:56,973 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 217 flow [2023-08-30 10:04:56,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-08-30 10:04:56,974 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 7 predicate places. [2023-08-30 10:04:56,974 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 217 flow [2023-08-30 10:04:56,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 181.14285714285714) internal successors, (1268), 7 states have internal predecessors, (1268), 0 states have call successors, (0), 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 10:04:56,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:56,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:04:56,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 10:04:57,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 10:04:57,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:57,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:57,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1474641832, now seen corresponding path program 1 times [2023-08-30 10:04:57,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:57,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438893109] [2023-08-30 10:04:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:57,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:57,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:57,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438893109] [2023-08-30 10:04:57,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438893109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:04:57,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64131009] [2023-08-30 10:04:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:57,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:57,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:04:57,226 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:04:57,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 10:04:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:57,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 10:04:57,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:04:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:57,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:04:57,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64131009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:04:57,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:04:57,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-30 10:04:57,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116402948] [2023-08-30 10:04:57,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:04:57,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:04:57,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:57,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:04:57,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 10:04:57,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 399 [2023-08-30 10:04:57,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 217 flow. Second operand has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 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 10:04:57,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:57,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 399 [2023-08-30 10:04:57,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:05:04,128 INFO L130 PetriNetUnfolder]: 89029/120958 cut-off events. [2023-08-30 10:05:04,128 INFO L131 PetriNetUnfolder]: For 27798/27798 co-relation queries the response was YES. [2023-08-30 10:05:04,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250667 conditions, 120958 events. 89029/120958 cut-off events. For 27798/27798 co-relation queries the response was YES. Maximal size of possible extension queue 4114. Compared 817941 event pairs, 63521 based on Foata normal form. 1519/98478 useless extension candidates. Maximal degree in co-relation 27810. Up to 117370 conditions per place. [2023-08-30 10:05:04,649 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 60 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-08-30 10:05:04,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 336 flow [2023-08-30 10:05:04,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:05:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:05:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 781 transitions. [2023-08-30 10:05:04,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4893483709273183 [2023-08-30 10:05:04,651 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 781 transitions. [2023-08-30 10:05:04,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 781 transitions. [2023-08-30 10:05:04,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:05:04,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 781 transitions. [2023-08-30 10:05:04,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 0 states have call successors, (0), 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 10:05:04,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 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 10:05:04,656 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 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 10:05:04,656 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 217 flow. Second operand 4 states and 781 transitions. [2023-08-30 10:05:04,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 336 flow [2023-08-30 10:05:04,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 324 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 10:05:04,671 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 188 flow [2023-08-30 10:05:04,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2023-08-30 10:05:04,672 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2023-08-30 10:05:04,672 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 188 flow [2023-08-30 10:05:04,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 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 10:05:04,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:04,673 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:05:04,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 10:05:04,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:05:04,873 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:05:04,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:04,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1715290615, now seen corresponding path program 1 times [2023-08-30 10:05:04,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:04,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133287246] [2023-08-30 10:05:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:04,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 10:05:04,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:05:04,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133287246] [2023-08-30 10:05:04,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133287246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:05:04,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:05:04,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 10:05:04,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453400878] [2023-08-30 10:05:04,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:05:04,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:05:04,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:05:04,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:05:04,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:05:04,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 399 [2023-08-30 10:05:04,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 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 10:05:04,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:05:04,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 399 [2023-08-30 10:05:04,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:05:15,888 INFO L130 PetriNetUnfolder]: 147094/197151 cut-off events. [2023-08-30 10:05:15,888 INFO L131 PetriNetUnfolder]: For 18017/18017 co-relation queries the response was YES. [2023-08-30 10:05:16,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398953 conditions, 197151 events. 147094/197151 cut-off events. For 18017/18017 co-relation queries the response was YES. Maximal size of possible extension queue 6726. Compared 1368488 event pairs, 90639 based on Foata normal form. 0/157717 useless extension candidates. Maximal degree in co-relation 398883. Up to 122665 conditions per place. [2023-08-30 10:05:16,724 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 106 selfloop transitions, 4 changer transitions 0/116 dead transitions. [2023-08-30 10:05:16,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 116 transitions, 516 flow [2023-08-30 10:05:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:05:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:05:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 814 transitions. [2023-08-30 10:05:16,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5100250626566416 [2023-08-30 10:05:16,727 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 814 transitions. [2023-08-30 10:05:16,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 814 transitions. [2023-08-30 10:05:16,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:05:16,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 814 transitions. [2023-08-30 10:05:16,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 0 states have call successors, (0), 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 10:05:16,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 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 10:05:16,730 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 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 10:05:16,731 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 188 flow. Second operand 4 states and 814 transitions. [2023-08-30 10:05:16,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 116 transitions, 516 flow [2023-08-30 10:05:16,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 116 transitions, 513 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:05:16,738 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 217 flow [2023-08-30 10:05:16,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-08-30 10:05:16,739 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-08-30 10:05:16,739 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 217 flow [2023-08-30 10:05:16,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 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 10:05:16,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:16,740 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:05:16,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 10:05:16,740 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:05:16,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:16,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1634423493, now seen corresponding path program 1 times [2023-08-30 10:05:16,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:16,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737560744] [2023-08-30 10:05:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:16,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 10:05:16,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:05:16,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737560744] [2023-08-30 10:05:16,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737560744] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:05:16,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:05:16,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:05:16,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116007443] [2023-08-30 10:05:16,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:05:16,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:05:16,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:05:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:05:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:05:16,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 399 [2023-08-30 10:05:16,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 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 10:05:16,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:05:16,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 399 [2023-08-30 10:05:16,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:05:31,285 INFO L130 PetriNetUnfolder]: 174167/243180 cut-off events. [2023-08-30 10:05:31,285 INFO L131 PetriNetUnfolder]: For 23964/24094 co-relation queries the response was YES. [2023-08-30 10:05:31,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503811 conditions, 243180 events. 174167/243180 cut-off events. For 23964/24094 co-relation queries the response was YES. Maximal size of possible extension queue 7237. Compared 1828243 event pairs, 74857 based on Foata normal form. 0/211427 useless extension candidates. Maximal degree in co-relation 503747. Up to 142041 conditions per place. [2023-08-30 10:05:32,638 INFO L137 encePairwiseOnDemand]: 388/399 looper letters, 93 selfloop transitions, 4 changer transitions 0/104 dead transitions. [2023-08-30 10:05:32,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 104 transitions, 516 flow [2023-08-30 10:05:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:05:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:05:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-08-30 10:05:32,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338345864661654 [2023-08-30 10:05:32,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-08-30 10:05:32,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-08-30 10:05:32,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:05:32,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-08-30 10:05:32,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 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 10:05:32,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 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 10:05:32,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 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 10:05:32,644 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 217 flow. Second operand 3 states and 639 transitions. [2023-08-30 10:05:32,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 104 transitions, 516 flow [2023-08-30 10:05:33,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 104 transitions, 513 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:05:33,304 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 257 flow [2023-08-30 10:05:33,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=257, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2023-08-30 10:05:33,305 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 11 predicate places. [2023-08-30 10:05:33,305 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 257 flow [2023-08-30 10:05:33,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 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 10:05:33,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:33,305 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:05:33,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 10:05:33,306 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:05:33,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:33,306 INFO L85 PathProgramCache]: Analyzing trace with hash -872768577, now seen corresponding path program 1 times [2023-08-30 10:05:33,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:33,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265317147] [2023-08-30 10:05:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:33,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:05:33,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:05:33,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265317147] [2023-08-30 10:05:33,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265317147] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:05:33,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376180030] [2023-08-30 10:05:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:33,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:05:33,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:05:33,372 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:05:33,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 10:05:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:33,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 10:05:33,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:05:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:05:33,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:05:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:05:33,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376180030] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:05:33,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:05:33,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 10:05:33,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357384657] [2023-08-30 10:05:33,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:05:33,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 10:05:33,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:05:33,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 10:05:33,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 10:05:33,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 399 [2023-08-30 10:05:33,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 257 flow. Second operand has 13 states, 13 states have (on average 181.6153846153846) internal successors, (2361), 13 states have internal predecessors, (2361), 0 states have call successors, (0), 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 10:05:33,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:05:33,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 399 [2023-08-30 10:05:33,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:05:34,064 INFO L130 PetriNetUnfolder]: 5152/7555 cut-off events. [2023-08-30 10:05:34,064 INFO L131 PetriNetUnfolder]: For 8052/8052 co-relation queries the response was YES. [2023-08-30 10:05:34,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17217 conditions, 7555 events. 5152/7555 cut-off events. For 8052/8052 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 41020 event pairs, 0 based on Foata normal form. 720/8275 useless extension candidates. Maximal degree in co-relation 17204. Up to 3444 conditions per place. [2023-08-30 10:05:34,085 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 0 selfloop transitions, 0 changer transitions 79/79 dead transitions. [2023-08-30 10:05:34,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 79 transitions, 367 flow [2023-08-30 10:05:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:05:34,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:05:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1329 transitions. [2023-08-30 10:05:34,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758324382384533 [2023-08-30 10:05:34,088 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1329 transitions. [2023-08-30 10:05:34,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1329 transitions. [2023-08-30 10:05:34,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:05:34,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1329 transitions. [2023-08-30 10:05:34,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 189.85714285714286) internal successors, (1329), 7 states have internal predecessors, (1329), 0 states have call successors, (0), 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 10:05:34,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 399.0) internal successors, (3192), 8 states have internal predecessors, (3192), 0 states have call successors, (0), 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 10:05:34,095 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 399.0) internal successors, (3192), 8 states have internal predecessors, (3192), 0 states have call successors, (0), 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 10:05:34,095 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 257 flow. Second operand 7 states and 1329 transitions. [2023-08-30 10:05:34,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 79 transitions, 367 flow [2023-08-30 10:05:34,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 79 transitions, 344 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-08-30 10:05:34,104 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2023-08-30 10:05:34,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2023-08-30 10:05:34,105 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -17 predicate places. [2023-08-30 10:05:34,105 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2023-08-30 10:05:34,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 181.6153846153846) internal successors, (2361), 13 states have internal predecessors, (2361), 0 states have call successors, (0), 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 10:05:34,106 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2023-08-30 10:05:34,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2023-08-30 10:05:34,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2023-08-30 10:05:34,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2023-08-30 10:05:34,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2023-08-30 10:05:34,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2023-08-30 10:05:34,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2023-08-30 10:05:34,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2023-08-30 10:05:34,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2023-08-30 10:05:34,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2023-08-30 10:05:34,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 10:05:34,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:05:34,313 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 10:05:34,314 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:05:34,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 217 transitions, 478 flow [2023-08-30 10:05:34,360 INFO L130 PetriNetUnfolder]: 99/811 cut-off events. [2023-08-30 10:05:34,360 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 10:05:34,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 811 events. 99/811 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3715 event pairs, 6 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 573. Up to 32 conditions per place. [2023-08-30 10:05:34,365 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 217 transitions, 478 flow [2023-08-30 10:05:34,367 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 217 transitions, 478 flow [2023-08-30 10:05:34,367 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:05:34,367 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 217 transitions, 478 flow [2023-08-30 10:05:34,367 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 217 transitions, 478 flow [2023-08-30 10:05:34,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 217 transitions, 478 flow [2023-08-30 10:05:34,409 INFO L130 PetriNetUnfolder]: 99/811 cut-off events. [2023-08-30 10:05:34,409 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 10:05:34,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 811 events. 99/811 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3715 event pairs, 6 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 573. Up to 32 conditions per place. [2023-08-30 10:05:34,422 INFO L119 LiptonReduction]: Number of co-enabled transitions 20216 [2023-08-30 10:05:37,678 INFO L134 LiptonReduction]: Checked pairs total: 34015 [2023-08-30 10:05:37,678 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-08-30 10:05:37,680 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:05:37,681 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;@6eb81b07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:05:37,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:05:37,688 INFO L130 PetriNetUnfolder]: 45/189 cut-off events. [2023-08-30 10:05:37,688 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 10:05:37,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:37,688 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 10:05:37,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:05:37,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:37,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1764647287, now seen corresponding path program 1 times [2023-08-30 10:05:37,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:37,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283472140] [2023-08-30 10:05:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:37,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:05:37,704 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:05:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:05:37,717 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:05:37,717 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:05:37,718 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:05:37,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 10:05:37,718 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:05:37,718 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:05:37,719 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:05:37,719 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 10:05:37,737 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 10:05:37,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 238 transitions, 536 flow [2023-08-30 10:05:37,848 INFO L130 PetriNetUnfolder]: 161/1233 cut-off events. [2023-08-30 10:05:37,848 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 10:05:37,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1344 conditions, 1233 events. 161/1233 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6331 event pairs, 23 based on Foata normal form. 0/980 useless extension candidates. Maximal degree in co-relation 856. Up to 80 conditions per place. [2023-08-30 10:05:37,857 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 238 transitions, 536 flow [2023-08-30 10:05:37,861 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 238 transitions, 536 flow [2023-08-30 10:05:37,861 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:05:37,861 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 238 transitions, 536 flow [2023-08-30 10:05:37,861 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 238 transitions, 536 flow [2023-08-30 10:05:37,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 238 transitions, 536 flow [2023-08-30 10:05:37,937 INFO L130 PetriNetUnfolder]: 161/1233 cut-off events. [2023-08-30 10:05:37,937 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 10:05:37,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1344 conditions, 1233 events. 161/1233 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6331 event pairs, 23 based on Foata normal form. 0/980 useless extension candidates. Maximal degree in co-relation 856. Up to 80 conditions per place. [2023-08-30 10:05:37,960 INFO L119 LiptonReduction]: Number of co-enabled transitions 27360 [2023-08-30 10:05:40,886 INFO L134 LiptonReduction]: Checked pairs total: 44944 [2023-08-30 10:05:40,886 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-08-30 10:05:40,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:05:40,887 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;@6eb81b07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:05:40,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 10:05:40,889 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 10:05:40,889 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:05:40,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:40,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 10:05:40,889 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:05:40,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:40,890 INFO L85 PathProgramCache]: Analyzing trace with hash 86357874, now seen corresponding path program 1 times [2023-08-30 10:05:40,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:40,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384647042] [2023-08-30 10:05:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:40,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:40,913 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 10:05:40,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:05:40,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384647042] [2023-08-30 10:05:40,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384647042] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:05:40,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:05:40,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:05:40,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604565578] [2023-08-30 10:05:40,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:05:40,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:05:40,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:05:40,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:05:40,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:05:40,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 437 [2023-08-30 10:05:40,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 91 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 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 10:05:40,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:05:40,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 437 [2023-08-30 10:05:40,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand