./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 TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/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 TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 14:09:30,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 14:09:30,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 14:09:30,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 14:09:30,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 14:09:30,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 14:09:30,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 14:09:30,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 14:09:30,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 14:09:30,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 14:09:30,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 14:09:30,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 14:09:30,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 14:09:30,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 14:09:30,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 14:09:30,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 14:09:30,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 14:09:30,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 14:09:30,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 14:09:30,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 14:09:30,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 14:09:30,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 14:09:30,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 14:09:30,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 14:09:30,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 14:09:30,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 14:09:30,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 14:09:30,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 14:09:30,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 14:09:30,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 14:09:30,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 14:09:30,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 14:09:30,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 14:09:30,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 14:09:30,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 14:09:30,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 14:09:30,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 14:09:30,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 14:09:30,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 14:09:30,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 14:09:30,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 14:09:30,696 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 14:09:30,720 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 14:09:30,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 14:09:30,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 14:09:30,721 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 14:09:30,722 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 14:09:30,722 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 14:09:30,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 14:09:30,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 14:09:30,723 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 14:09:30,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 14:09:30,723 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 14:09:30,724 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 14:09:30,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 14:09:30,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 14:09:30,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 14:09:30,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 14:09:30,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 14:09:30,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 14:09:30,725 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 14:09:30,725 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 14:09:30,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 14:09:30,725 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 14:09:30,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 14:09:30,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 14:09:30,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 14:09:30,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 14:09:30,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 14:09:30,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 14:09:30,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 14:09:30,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 14:09:30,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 14:09:30,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 14:09:30,727 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 14:09:30,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 14:09:30,727 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 14:09:30,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 14:09:30,727 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 14:09:30,728 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 14:09:30,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 14:09:30,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 14:09:30,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 14:09:30,954 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 14:09:30,954 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 14:09:30,955 INFO L432 ainManager$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 14:09:31,815 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 14:09:32,031 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 14:09:32,031 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-30 14:09:32,043 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5e8b23d1/e906405024ca4e58985eeea5c037cc04/FLAG1d8b2ac3e [2023-08-30 14:09:32,052 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5e8b23d1/e906405024ca4e58985eeea5c037cc04 [2023-08-30 14:09:32,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 14:09:32,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 14:09:32,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 14:09:32,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 14:09:32,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 14:09:32,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:09:32" (1/1) ... [2023-08-30 14:09:32,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3744523a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:09:32, skipping insertion in model container [2023-08-30 14:09:32,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:09:32" (1/1) ... [2023-08-30 14:09:32,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 14:09:32,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 14:09:32,279 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 14:09:32,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 14:09:32,313 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 14:09:32,344 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 14:09:32,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 14:09:32,390 WARN L667 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 14:09:32,394 INFO L208 MainTranslator]: Completed translation [2023-08-30 14:09:32,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:09:32 WrapperNode [2023-08-30 14:09:32,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 14:09:32,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 14:09:32,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 14:09:32,396 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 14:09:32,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:09:32" (1/1) ... [2023-08-30 14:09:32,436 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:09:32" (1/1) ... [2023-08-30 14:09:32,452 INFO L138 Inliner]: procedures = 173, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 144 [2023-08-30 14:09:32,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 14:09:32,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 14:09:32,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 14:09:32,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 14:09:32,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:09:32" (1/1) ... [2023-08-30 14:09:32,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:09:32" (1/1) ... [2023-08-30 14:09:32,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:09:32" (1/1) ... [2023-08-30 14:09:32,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:09:32" (1/1) ... [2023-08-30 14:09:32,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:09:32" (1/1) ... [2023-08-30 14:09:32,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:09:32" (1/1) ... [2023-08-30 14:09:32,495 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:09:32" (1/1) ... [2023-08-30 14:09:32,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:09:32" (1/1) ... [2023-08-30 14:09:32,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 14:09:32,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 14:09:32,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 14:09:32,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 14:09:32,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:09:32" (1/1) ... [2023-08-30 14:09:32,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 14:09:32,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 14:09:32,536 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 14:09:32,542 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 14:09:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 14:09:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 14:09:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 14:09:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 14:09:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 14:09:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 14:09:32,564 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 14:09:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 14:09:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 14:09:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 14:09:32,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 14:09:32,566 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 14:09:32,684 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 14:09:32,685 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 14:09:32,892 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 14:09:32,897 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 14:09:32,907 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-30 14:09:32,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:09:32 BoogieIcfgContainer [2023-08-30 14:09:32,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 14:09:32,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 14:09:32,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 14:09:32,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 14:09:32,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:09:32" (1/3) ... [2023-08-30 14:09:32,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad85676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:09:32, skipping insertion in model container [2023-08-30 14:09:32,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:09:32" (2/3) ... [2023-08-30 14:09:32,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad85676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:09:32, skipping insertion in model container [2023-08-30 14:09:32,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:09:32" (3/3) ... [2023-08-30 14:09:32,914 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-08-30 14:09:32,919 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 14:09:32,925 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 14:09:32,925 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 14:09:32,925 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 14:09:32,982 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 14:09:33,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 154 transitions, 316 flow [2023-08-30 14:09:33,115 INFO L130 PetriNetUnfolder]: 26/236 cut-off events. [2023-08-30 14:09:33,115 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 14:09:33,120 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 14:09:33,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 154 transitions, 316 flow [2023-08-30 14:09:33,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 151 transitions, 310 flow [2023-08-30 14:09:33,130 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 14:09:33,144 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 151 transitions, 310 flow [2023-08-30 14:09:33,147 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 151 transitions, 310 flow [2023-08-30 14:09:33,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 151 transitions, 310 flow [2023-08-30 14:09:33,185 INFO L130 PetriNetUnfolder]: 25/233 cut-off events. [2023-08-30 14:09:33,186 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 14:09:33,188 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 14:09:33,190 INFO L119 LiptonReduction]: Number of co-enabled transitions 3496 [2023-08-30 14:09:36,075 INFO L134 LiptonReduction]: Checked pairs total: 4691 [2023-08-30 14:09:36,075 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-30 14:09:36,084 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 14:09:36,088 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;@1c033023, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 14:09:36,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 14:09:36,090 INFO L130 PetriNetUnfolder]: 2/10 cut-off events. [2023-08-30 14:09:36,090 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 14:09:36,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:09:36,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 14:09:36,094 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:09:36,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:09:36,097 INFO L85 PathProgramCache]: Analyzing trace with hash 17346251, now seen corresponding path program 1 times [2023-08-30 14:09:36,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:09:36,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924942945] [2023-08-30 14:09:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:36,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:09:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:09:36,288 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 14:09:36,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:09:36,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924942945] [2023-08-30 14:09:36,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924942945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 14:09:36,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 14:09:36,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 14:09:36,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255717969] [2023-08-30 14:09:36,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 14:09:36,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 14:09:36,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:09:36,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 14:09:36,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 14:09:36,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 293 [2023-08-30 14:09:36,339 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 14:09:36,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:09:36,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 293 [2023-08-30 14:09:36,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:09:36,403 INFO L130 PetriNetUnfolder]: 78/189 cut-off events. [2023-08-30 14:09:36,404 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 14:09:36,405 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 14:09:36,407 INFO L137 encePairwiseOnDemand]: 278/293 looper letters, 31 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-30 14:09:36,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 148 flow [2023-08-30 14:09:36,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 14:09:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 14:09:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-30 14:09:36,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164960182025028 [2023-08-30 14:09:36,422 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-30 14:09:36,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-30 14:09:36,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:09:36,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-30 14:09:36,430 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 14:09:36,434 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 14:09:36,434 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 14:09:36,435 INFO L175 Difference]: Start difference. First operand has 37 places, 45 transitions, 98 flow. Second operand 3 states and 454 transitions. [2023-08-30 14:09:36,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 148 flow [2023-08-30 14:09:36,437 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 14:09:36,439 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 80 flow [2023-08-30 14:09:36,440 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=80, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-08-30 14:09:36,442 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-08-30 14:09:36,443 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 80 flow [2023-08-30 14:09:36,443 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 14:09:36,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:09:36,443 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 14:09:36,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 14:09:36,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:09:36,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:09:36,448 INFO L85 PathProgramCache]: Analyzing trace with hash -510063114, now seen corresponding path program 1 times [2023-08-30 14:09:36,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:09:36,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735116957] [2023-08-30 14:09:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:36,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:09:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 14:09:36,481 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 14:09:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 14:09:36,502 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 14:09:36,502 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 14:09:36,503 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-08-30 14:09:36,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 11 remaining) [2023-08-30 14:09:36,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 11 remaining) [2023-08-30 14:09:36,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 11 remaining) [2023-08-30 14:09:36,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 11 remaining) [2023-08-30 14:09:36,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 11 remaining) [2023-08-30 14:09:36,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 11 remaining) [2023-08-30 14:09:36,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 11 remaining) [2023-08-30 14:09:36,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 11 remaining) [2023-08-30 14:09:36,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 11 remaining) [2023-08-30 14:09:36,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 11 remaining) [2023-08-30 14:09:36,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 14:09:36,506 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 14:09:36,508 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 14:09:36,508 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 14:09:36,519 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 14:09:36,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 175 transitions, 368 flow [2023-08-30 14:09:36,548 INFO L130 PetriNetUnfolder]: 43/375 cut-off events. [2023-08-30 14:09:36,548 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 14:09:36,549 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 14:09:36,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 175 transitions, 368 flow [2023-08-30 14:09:36,551 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 175 transitions, 368 flow [2023-08-30 14:09:36,551 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 14:09:36,551 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 175 transitions, 368 flow [2023-08-30 14:09:36,551 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 175 transitions, 368 flow [2023-08-30 14:09:36,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 175 transitions, 368 flow [2023-08-30 14:09:36,579 INFO L130 PetriNetUnfolder]: 43/375 cut-off events. [2023-08-30 14:09:36,579 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 14:09:36,580 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 14:09:36,583 INFO L119 LiptonReduction]: Number of co-enabled transitions 8436 [2023-08-30 14:09:39,213 INFO L134 LiptonReduction]: Checked pairs total: 13360 [2023-08-30 14:09:39,213 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-08-30 14:09:39,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 14:09:39,217 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;@1c033023, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 14:09:39,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 14:09:39,219 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-30 14:09:39,219 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 14:09:39,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:09:39,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 14:09:39,219 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:09:39,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:09:39,219 INFO L85 PathProgramCache]: Analyzing trace with hash 28026118, now seen corresponding path program 1 times [2023-08-30 14:09:39,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:09:39,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011584722] [2023-08-30 14:09:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:39,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:09:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:09:39,251 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 14:09:39,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:09:39,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011584722] [2023-08-30 14:09:39,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011584722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 14:09:39,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 14:09:39,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 14:09:39,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606782471] [2023-08-30 14:09:39,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 14:09:39,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 14:09:39,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:09:39,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 14:09:39,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 14:09:39,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 326 [2023-08-30 14:09:39,261 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 14:09:39,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:09:39,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 326 [2023-08-30 14:09:39,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:09:39,478 INFO L130 PetriNetUnfolder]: 1795/2981 cut-off events. [2023-08-30 14:09:39,480 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2023-08-30 14:09:39,482 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 16156 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 14:09:39,489 INFO L137 encePairwiseOnDemand]: 310/326 looper letters, 47 selfloop transitions, 2 changer transitions 1/55 dead transitions. [2023-08-30 14:09:39,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 228 flow [2023-08-30 14:09:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 14:09:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 14:09:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-30 14:09:39,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286298568507157 [2023-08-30 14:09:39,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-30 14:09:39,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-30 14:09:39,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:09:39,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-30 14:09:39,493 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 14:09:39,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 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 14:09:39,495 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 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 14:09:39,496 INFO L175 Difference]: Start difference. First operand has 48 places, 58 transitions, 134 flow. Second operand 3 states and 517 transitions. [2023-08-30 14:09:39,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 228 flow [2023-08-30 14:09:39,497 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 14:09:39,498 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 126 flow [2023-08-30 14:09:39,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, 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=126, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-08-30 14:09:39,499 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2023-08-30 14:09:39,499 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 126 flow [2023-08-30 14:09:39,500 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 14:09:39,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:09:39,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 14:09:39,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 14:09:39,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:09:39,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:09:39,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1757586471, now seen corresponding path program 1 times [2023-08-30 14:09:39,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:09:39,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019699652] [2023-08-30 14:09:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:39,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:09:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:09:39,566 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 14:09:39,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:09:39,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019699652] [2023-08-30 14:09:39,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019699652] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 14:09:39,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093973604] [2023-08-30 14:09:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:39,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 14:09:39,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 14:09:39,570 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 14:09:39,585 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 14:09:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:09:39,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 14:09:39,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 14:09:39,675 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 14:09:39,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 14:09:39,699 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 14:09:39,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093973604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 14:09:39,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 14:09:39,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 14:09:39,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946231738] [2023-08-30 14:09:39,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 14:09:39,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 14:09:39,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:09:39,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 14:09:39,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 14:09:39,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 326 [2023-08-30 14:09:39,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 126 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 14:09:39,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:09:39,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 326 [2023-08-30 14:09:39,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:09:39,865 INFO L130 PetriNetUnfolder]: 261/502 cut-off events. [2023-08-30 14:09:39,866 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2023-08-30 14:09:39,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 502 events. 261/502 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2220 event pairs, 0 based on Foata normal form. 49/481 useless extension candidates. Maximal degree in co-relation 218. Up to 226 conditions per place. [2023-08-30 14:09:39,868 INFO L137 encePairwiseOnDemand]: 321/326 looper letters, 44 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-08-30 14:09:39,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 50 transitions, 218 flow [2023-08-30 14:09:39,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 14:09:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 14:09:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 945 transitions. [2023-08-30 14:09:39,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831288343558282 [2023-08-30 14:09:39,870 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 945 transitions. [2023-08-30 14:09:39,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 945 transitions. [2023-08-30 14:09:39,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:09:39,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 945 transitions. [2023-08-30 14:09:39,872 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 14:09:39,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 326.0) internal successors, (2282), 7 states have internal predecessors, (2282), 0 states have call successors, (0), 0 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 14:09:39,875 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 326.0) internal successors, (2282), 7 states have internal predecessors, (2282), 0 states have call successors, (0), 0 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 14:09:39,875 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 126 flow. Second operand 6 states and 945 transitions. [2023-08-30 14:09:39,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 50 transitions, 218 flow [2023-08-30 14:09:39,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 50 transitions, 214 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 14:09:39,877 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 66 flow [2023-08-30 14:09:39,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-08-30 14:09:39,877 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -17 predicate places. [2023-08-30 14:09:39,878 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 66 flow [2023-08-30 14:09:39,878 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 14:09:39,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:09:39,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 14:09:39,887 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 14:09:40,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 14:09:40,086 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:09:40,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:09:40,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1349375833, now seen corresponding path program 1 times [2023-08-30 14:09:40,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:09:40,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521104092] [2023-08-30 14:09:40,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:40,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:09:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:09:40,146 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 14:09:40,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:09:40,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521104092] [2023-08-30 14:09:40,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521104092] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 14:09:40,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527272023] [2023-08-30 14:09:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:40,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 14:09:40,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 14:09:40,149 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 14:09:40,152 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 14:09:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:09:40,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 14:09:40,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 14:09:40,216 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 14:09:40,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 14:09:40,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527272023] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 14:09:40,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 14:09:40,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-30 14:09:40,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908498593] [2023-08-30 14:09:40,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 14:09:40,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 14:09:40,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:09:40,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 14:09:40,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 14:09:40,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 326 [2023-08-30 14:09:40,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 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 14:09:40,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:09:40,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 326 [2023-08-30 14:09:40,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:09:40,266 INFO L130 PetriNetUnfolder]: 190/354 cut-off events. [2023-08-30 14:09:40,267 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2023-08-30 14:09:40,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 354 events. 190/354 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1376 event pairs, 70 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 141. Up to 330 conditions per place. [2023-08-30 14:09:40,268 INFO L137 encePairwiseOnDemand]: 323/326 looper letters, 22 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-30 14:09:40,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 122 flow [2023-08-30 14:09:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 14:09:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 14:09:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 625 transitions. [2023-08-30 14:09:40,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47929447852760737 [2023-08-30 14:09:40,270 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 625 transitions. [2023-08-30 14:09:40,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 625 transitions. [2023-08-30 14:09:40,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:09:40,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 625 transitions. [2023-08-30 14:09:40,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 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 14:09:40,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 326.0) internal successors, (1630), 5 states have internal predecessors, (1630), 0 states have call successors, (0), 0 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 14:09:40,276 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 326.0) internal successors, (1630), 5 states have internal predecessors, (1630), 0 states have call successors, (0), 0 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 14:09:40,276 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 66 flow. Second operand 4 states and 625 transitions. [2023-08-30 14:09:40,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 122 flow [2023-08-30 14:09:40,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 115 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 14:09:40,277 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 57 flow [2023-08-30 14:09:40,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=57, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-30 14:09:40,279 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -19 predicate places. [2023-08-30 14:09:40,279 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 57 flow [2023-08-30 14:09:40,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 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 14:09:40,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:09:40,280 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 14:09:40,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 14:09:40,484 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 14:09:40,484 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:09:40,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:09:40,484 INFO L85 PathProgramCache]: Analyzing trace with hash 330013953, now seen corresponding path program 1 times [2023-08-30 14:09:40,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:09:40,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495356584] [2023-08-30 14:09:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:40,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:09:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 14:09:40,495 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 14:09:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 14:09:40,504 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 14:09:40,504 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 14:09:40,504 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-08-30 14:09:40,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 11 remaining) [2023-08-30 14:09:40,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 11 remaining) [2023-08-30 14:09:40,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 11 remaining) [2023-08-30 14:09:40,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 11 remaining) [2023-08-30 14:09:40,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 11 remaining) [2023-08-30 14:09:40,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 11 remaining) [2023-08-30 14:09:40,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 11 remaining) [2023-08-30 14:09:40,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 11 remaining) [2023-08-30 14:09:40,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 11 remaining) [2023-08-30 14:09:40,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 11 remaining) [2023-08-30 14:09:40,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 14:09:40,509 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 14:09:40,509 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 14:09:40,509 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 14:09:40,520 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 14:09:40,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 196 transitions, 422 flow [2023-08-30 14:09:40,553 INFO L130 PetriNetUnfolder]: 65/553 cut-off events. [2023-08-30 14:09:40,553 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 14:09:40,556 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 14:09:40,556 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 196 transitions, 422 flow [2023-08-30 14:09:40,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 196 transitions, 422 flow [2023-08-30 14:09:40,561 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 14:09:40,561 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 196 transitions, 422 flow [2023-08-30 14:09:40,561 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 196 transitions, 422 flow [2023-08-30 14:09:40,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 196 transitions, 422 flow [2023-08-30 14:09:40,589 INFO L130 PetriNetUnfolder]: 65/553 cut-off events. [2023-08-30 14:09:40,590 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 14:09:40,591 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 14:09:40,599 INFO L119 LiptonReduction]: Number of co-enabled transitions 13908 [2023-08-30 14:09:43,354 INFO L134 LiptonReduction]: Checked pairs total: 21770 [2023-08-30 14:09:43,354 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-30 14:09:43,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 14:09:43,358 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;@1c033023, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 14:09:43,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 14:09:43,360 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 14:09:43,360 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 14:09:43,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:09:43,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 14:09:43,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:09:43,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:09:43,360 INFO L85 PathProgramCache]: Analyzing trace with hash 39846951, now seen corresponding path program 1 times [2023-08-30 14:09:43,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:09:43,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871039899] [2023-08-30 14:09:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:43,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:09:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:09:43,395 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 14:09:43,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:09:43,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871039899] [2023-08-30 14:09:43,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871039899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 14:09:43,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 14:09:43,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 14:09:43,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655455025] [2023-08-30 14:09:43,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 14:09:43,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 14:09:43,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:09:43,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 14:09:43,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 14:09:43,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 363 [2023-08-30 14:09:43,404 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 14:09:43,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:09:43,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 363 [2023-08-30 14:09:43,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:09:44,609 INFO L130 PetriNetUnfolder]: 13999/20253 cut-off events. [2023-08-30 14:09:44,609 INFO L131 PetriNetUnfolder]: For 516/516 co-relation queries the response was YES. [2023-08-30 14:09:44,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40633 conditions, 20253 events. 13999/20253 cut-off events. For 516/516 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 121884 event pairs, 8909 based on Foata normal form. 2116/18603 useless extension candidates. Maximal degree in co-relation 5942. Up to 20026 conditions per place. [2023-08-30 14:09:44,694 INFO L137 encePairwiseOnDemand]: 344/363 looper letters, 51 selfloop transitions, 2 changer transitions 1/60 dead transitions. [2023-08-30 14:09:44,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 258 flow [2023-08-30 14:09:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 14:09:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 14:09:44,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2023-08-30 14:09:44,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224977043158862 [2023-08-30 14:09:44,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2023-08-30 14:09:44,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2023-08-30 14:09:44,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:09:44,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2023-08-30 14:09:44,698 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 14:09:44,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 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 14:09:44,700 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 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 14:09:44,700 INFO L175 Difference]: Start difference. First operand has 57 places, 69 transitions, 168 flow. Second operand 3 states and 569 transitions. [2023-08-30 14:09:44,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 258 flow [2023-08-30 14:09:44,703 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 14:09:44,704 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 152 flow [2023-08-30 14:09:44,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, 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=152, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2023-08-30 14:09:44,705 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-08-30 14:09:44,705 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 152 flow [2023-08-30 14:09:44,705 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 14:09:44,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:09:44,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 14:09:44,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 14:09:44,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:09:44,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:09:44,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1294037525, now seen corresponding path program 1 times [2023-08-30 14:09:44,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:09:44,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664175100] [2023-08-30 14:09:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:44,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:09:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:09:44,749 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 14:09:44,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:09:44,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664175100] [2023-08-30 14:09:44,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664175100] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 14:09:44,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30881568] [2023-08-30 14:09:44,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:44,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 14:09:44,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 14:09:44,751 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 14:09:44,753 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 14:09:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:09:44,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 14:09:44,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 14:09:44,814 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 14:09:44,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 14:09:44,829 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 14:09:44,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30881568] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 14:09:44,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 14:09:44,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 14:09:44,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624724915] [2023-08-30 14:09:44,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 14:09:44,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 14:09:44,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:09:44,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 14:09:44,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 14:09:44,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 363 [2023-08-30 14:09:44,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 152 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 14:09:44,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:09:44,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 363 [2023-08-30 14:09:44,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:09:45,068 INFO L130 PetriNetUnfolder]: 2091/3315 cut-off events. [2023-08-30 14:09:45,068 INFO L131 PetriNetUnfolder]: For 970/970 co-relation queries the response was YES. [2023-08-30 14:09:45,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7648 conditions, 3315 events. 2091/3315 cut-off events. For 970/970 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17815 event pairs, 0 based on Foata normal form. 245/3200 useless extension candidates. Maximal degree in co-relation 1599. Up to 1466 conditions per place. [2023-08-30 14:09:45,079 INFO L137 encePairwiseOnDemand]: 358/363 looper letters, 65 selfloop transitions, 6 changer transitions 0/74 dead transitions. [2023-08-30 14:09:45,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 74 transitions, 325 flow [2023-08-30 14:09:45,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 14:09:45,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 14:09:45,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1224 transitions. [2023-08-30 14:09:45,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817001180637544 [2023-08-30 14:09:45,082 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1224 transitions. [2023-08-30 14:09:45,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1224 transitions. [2023-08-30 14:09:45,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:09:45,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1224 transitions. [2023-08-30 14:09:45,084 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 14:09:45,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 363.0) internal successors, (2904), 8 states have internal predecessors, (2904), 0 states have call successors, (0), 0 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 14:09:45,087 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 363.0) internal successors, (2904), 8 states have internal predecessors, (2904), 0 states have call successors, (0), 0 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 14:09:45,087 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 152 flow. Second operand 7 states and 1224 transitions. [2023-08-30 14:09:45,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 74 transitions, 325 flow [2023-08-30 14:09:45,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 74 transitions, 317 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 14:09:45,092 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 95 flow [2023-08-30 14:09:45,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=95, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-30 14:09:45,094 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -17 predicate places. [2023-08-30 14:09:45,094 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 95 flow [2023-08-30 14:09:45,094 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 14:09:45,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:09:45,094 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 14:09:45,100 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 14:09:45,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 14:09:45,300 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:09:45,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:09:45,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1460494665, now seen corresponding path program 1 times [2023-08-30 14:09:45,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:09:45,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232278636] [2023-08-30 14:09:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:45,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:09:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:09:45,329 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 14:09:45,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:09:45,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232278636] [2023-08-30 14:09:45,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232278636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 14:09:45,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 14:09:45,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 14:09:45,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669785523] [2023-08-30 14:09:45,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 14:09:45,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 14:09:45,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:09:45,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 14:09:45,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 14:09:45,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 363 [2023-08-30 14:09:45,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 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 14:09:45,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:09:45,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 363 [2023-08-30 14:09:45,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:09:45,463 INFO L130 PetriNetUnfolder]: 1519/2303 cut-off events. [2023-08-30 14:09:45,464 INFO L131 PetriNetUnfolder]: For 832/832 co-relation queries the response was YES. [2023-08-30 14:09:45,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5185 conditions, 2303 events. 1519/2303 cut-off events. For 832/832 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11079 event pairs, 1519 based on Foata normal form. 0/2213 useless extension candidates. Maximal degree in co-relation 2935. Up to 2256 conditions per place. [2023-08-30 14:09:45,469 INFO L137 encePairwiseOnDemand]: 361/363 looper letters, 22 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 14:09:45,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 26 transitions, 129 flow [2023-08-30 14:09:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 14:09:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 14:09:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-30 14:09:45,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2023-08-30 14:09:45,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-30 14:09:45,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-30 14:09:45,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:09:45,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-30 14:09:45,472 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 14:09:45,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 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 14:09:45,474 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 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 14:09:45,474 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 95 flow. Second operand 3 states and 517 transitions. [2023-08-30 14:09:45,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 26 transitions, 129 flow [2023-08-30 14:09:45,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 26 transitions, 120 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 14:09:45,476 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 76 flow [2023-08-30 14:09:45,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-30 14:09:45,477 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -20 predicate places. [2023-08-30 14:09:45,477 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 76 flow [2023-08-30 14:09:45,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 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 14:09:45,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:09:45,477 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 14:09:45,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 14:09:45,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:09:45,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:09:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash 455058696, now seen corresponding path program 1 times [2023-08-30 14:09:45,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:09:45,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677996087] [2023-08-30 14:09:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:09:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 14:09:45,493 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 14:09:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 14:09:45,507 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 14:09:45,508 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 14:09:45,508 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-08-30 14:09:45,508 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 11 remaining) [2023-08-30 14:09:45,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 11 remaining) [2023-08-30 14:09:45,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 11 remaining) [2023-08-30 14:09:45,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 11 remaining) [2023-08-30 14:09:45,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 11 remaining) [2023-08-30 14:09:45,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 11 remaining) [2023-08-30 14:09:45,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 11 remaining) [2023-08-30 14:09:45,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 11 remaining) [2023-08-30 14:09:45,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 11 remaining) [2023-08-30 14:09:45,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 11 remaining) [2023-08-30 14:09:45,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 14:09:45,510 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 14:09:45,511 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 14:09:45,511 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 14:09:45,528 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 14:09:45,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 217 transitions, 478 flow [2023-08-30 14:09:45,583 INFO L130 PetriNetUnfolder]: 99/811 cut-off events. [2023-08-30 14:09:45,584 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 14:09:45,588 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 14:09:45,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 217 transitions, 478 flow [2023-08-30 14:09:45,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 217 transitions, 478 flow [2023-08-30 14:09:45,591 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 14:09:45,591 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 217 transitions, 478 flow [2023-08-30 14:09:45,591 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 217 transitions, 478 flow [2023-08-30 14:09:45,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 217 transitions, 478 flow [2023-08-30 14:09:45,641 INFO L130 PetriNetUnfolder]: 99/811 cut-off events. [2023-08-30 14:09:45,642 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 14:09:45,645 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 14:09:45,656 INFO L119 LiptonReduction]: Number of co-enabled transitions 20216 [2023-08-30 14:09:48,432 INFO L134 LiptonReduction]: Checked pairs total: 33608 [2023-08-30 14:09:48,433 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-30 14:09:48,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 14:09:48,434 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;@1c033023, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 14:09:48,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 14:09:48,436 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-30 14:09:48,436 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 14:09:48,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:09:48,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 14:09:48,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:09:48,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:09:48,437 INFO L85 PathProgramCache]: Analyzing trace with hash 52837854, now seen corresponding path program 1 times [2023-08-30 14:09:48,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:09:48,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638976844] [2023-08-30 14:09:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:48,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:09:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:09:48,457 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 14:09:48,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:09:48,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638976844] [2023-08-30 14:09:48,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638976844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 14:09:48,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 14:09:48,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 14:09:48,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515163564] [2023-08-30 14:09:48,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 14:09:48,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 14:09:48,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:09:48,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 14:09:48,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 14:09:48,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 401 [2023-08-30 14:09:48,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 80 transitions, 204 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 14:09:48,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:09:48,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 401 [2023-08-30 14:09:48,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:09:55,668 INFO L130 PetriNetUnfolder]: 102562/144121 cut-off events. [2023-08-30 14:09:55,668 INFO L131 PetriNetUnfolder]: For 5774/5774 co-relation queries the response was YES. [2023-08-30 14:09:55,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283767 conditions, 144121 events. 102562/144121 cut-off events. For 5774/5774 co-relation queries the response was YES. Maximal size of possible extension queue 4772. Compared 1074306 event pairs, 72837 based on Foata normal form. 23628/139495 useless extension candidates. Maximal degree in co-relation 43307. Up to 136343 conditions per place. [2023-08-30 14:09:56,231 INFO L137 encePairwiseOnDemand]: 379/401 looper letters, 58 selfloop transitions, 2 changer transitions 1/69 dead transitions. [2023-08-30 14:09:56,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 69 transitions, 304 flow [2023-08-30 14:09:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 14:09:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 14:09:56,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-08-30 14:09:56,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5187032418952618 [2023-08-30 14:09:56,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-08-30 14:09:56,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-08-30 14:09:56,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:09:56,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-08-30 14:09:56,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 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 14:09:56,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 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 14:09:56,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 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 14:09:56,236 INFO L175 Difference]: Start difference. First operand has 66 places, 80 transitions, 204 flow. Second operand 3 states and 624 transitions. [2023-08-30 14:09:56,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 69 transitions, 304 flow [2023-08-30 14:09:56,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 69 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 14:09:56,241 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 182 flow [2023-08-30 14:09:56,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-08-30 14:09:56,243 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2023-08-30 14:09:56,243 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 182 flow [2023-08-30 14:09:56,243 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 14:09:56,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:09:56,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 14:09:56,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 14:09:56,243 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:09:56,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:09:56,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1344755883, now seen corresponding path program 1 times [2023-08-30 14:09:56,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:09:56,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806529007] [2023-08-30 14:09:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:56,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:09:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:09:56,270 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 14:09:56,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:09:56,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806529007] [2023-08-30 14:09:56,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806529007] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 14:09:56,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095639178] [2023-08-30 14:09:56,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:09:56,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 14:09:56,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 14:09:56,272 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 14:09:56,274 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 14:09:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:09:56,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 14:09:56,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 14:09:56,343 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 14:09:56,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 14:09:56,356 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 14:09:56,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095639178] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 14:09:56,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 14:09:56,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 14:09:56,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556831428] [2023-08-30 14:09:56,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 14:09:56,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 14:09:56,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:09:56,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 14:09:56,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 14:09:56,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 401 [2023-08-30 14:09:56,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 182 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 14:09:56,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:09:56,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 401 [2023-08-30 14:09:56,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:10:01,657 INFO L130 PetriNetUnfolder]: 83713/114610 cut-off events. [2023-08-30 14:10:01,658 INFO L131 PetriNetUnfolder]: For 5172/5172 co-relation queries the response was YES. [2023-08-30 14:10:01,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232146 conditions, 114610 events. 83713/114610 cut-off events. For 5172/5172 co-relation queries the response was YES. Maximal size of possible extension queue 3796. Compared 786089 event pairs, 1086 based on Foata normal form. 258/95632 useless extension candidates. Maximal degree in co-relation 39834. Up to 94687 conditions per place. [2023-08-30 14:10:02,143 INFO L137 encePairwiseOnDemand]: 395/401 looper letters, 121 selfloop transitions, 9 changer transitions 0/138 dead transitions. [2023-08-30 14:10:02,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 138 transitions, 600 flow [2023-08-30 14:10:02,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 14:10:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 14:10:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1389 transitions. [2023-08-30 14:10:02,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49483434271464194 [2023-08-30 14:10:02,148 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1389 transitions. [2023-08-30 14:10:02,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1389 transitions. [2023-08-30 14:10:02,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:10:02,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1389 transitions. [2023-08-30 14:10:02,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.42857142857142) internal successors, (1389), 7 states have internal predecessors, (1389), 0 states have call successors, (0), 0 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 14:10:02,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 401.0) internal successors, (3208), 8 states have internal predecessors, (3208), 0 states have call successors, (0), 0 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 14:10:02,154 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 401.0) internal successors, (3208), 8 states have internal predecessors, (3208), 0 states have call successors, (0), 0 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 14:10:02,154 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 182 flow. Second operand 7 states and 1389 transitions. [2023-08-30 14:10:02,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 138 transitions, 600 flow [2023-08-30 14:10:02,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 138 transitions, 598 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 14:10:02,157 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 233 flow [2023-08-30 14:10:02,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=233, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2023-08-30 14:10:02,157 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2023-08-30 14:10:02,157 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 233 flow [2023-08-30 14:10:02,158 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 14:10:02,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:10:02,158 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 14:10:02,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 14:10:02,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 14:10:02,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:10:02,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:10:02,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1262137757, now seen corresponding path program 1 times [2023-08-30 14:10:02,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:10:02,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494851416] [2023-08-30 14:10:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:10:02,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:10:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:10:02,390 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 14:10:02,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:10:02,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494851416] [2023-08-30 14:10:02,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494851416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 14:10:02,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924164481] [2023-08-30 14:10:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:10:02,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 14:10:02,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 14:10:02,392 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 14:10:02,394 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 14:10:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:10:02,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 14:10:02,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 14:10:02,462 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 14:10:02,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 14:10:02,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924164481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 14:10:02,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 14:10:02,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-30 14:10:02,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907395469] [2023-08-30 14:10:02,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 14:10:02,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 14:10:02,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:10:02,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 14:10:02,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 14:10:02,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 401 [2023-08-30 14:10:02,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 233 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 14:10:02,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:10:02,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 401 [2023-08-30 14:10:02,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:10:08,291 INFO L130 PetriNetUnfolder]: 79664/108959 cut-off events. [2023-08-30 14:10:08,292 INFO L131 PetriNetUnfolder]: For 30526/30526 co-relation queries the response was YES. [2023-08-30 14:10:08,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229640 conditions, 108959 events. 79664/108959 cut-off events. For 30526/30526 co-relation queries the response was YES. Maximal size of possible extension queue 3696. Compared 740212 event pairs, 57474 based on Foata normal form. 1302/92483 useless extension candidates. Maximal degree in co-relation 29930. Up to 105212 conditions per place. [2023-08-30 14:10:08,731 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 59 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-08-30 14:10:08,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 348 flow [2023-08-30 14:10:08,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 14:10:08,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 14:10:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 779 transitions. [2023-08-30 14:10:08,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48566084788029923 [2023-08-30 14:10:08,733 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 779 transitions. [2023-08-30 14:10:08,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 779 transitions. [2023-08-30 14:10:08,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:10:08,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 779 transitions. [2023-08-30 14:10:08,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 0 states have call successors, (0), 0 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 14:10:08,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 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 14:10:08,736 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 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 14:10:08,736 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 233 flow. Second operand 4 states and 779 transitions. [2023-08-30 14:10:08,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 348 flow [2023-08-30 14:10:08,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 69 transitions, 340 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 14:10:08,747 INFO L231 Difference]: Finished difference. Result has 75 places, 63 transitions, 208 flow [2023-08-30 14:10:08,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2023-08-30 14:10:08,747 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2023-08-30 14:10:08,747 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 208 flow [2023-08-30 14:10:08,748 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 14:10:08,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:10:08,748 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 14:10:08,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 14:10:08,951 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 14:10:08,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:10:08,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:10:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1796567056, now seen corresponding path program 1 times [2023-08-30 14:10:08,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:10:08,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192691391] [2023-08-30 14:10:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:10:08,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:10:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 14:10:08,962 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 14:10:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 14:10:08,977 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 14:10:08,977 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 14:10:08,977 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-08-30 14:10:08,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 11 remaining) [2023-08-30 14:10:08,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 11 remaining) [2023-08-30 14:10:08,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 11 remaining) [2023-08-30 14:10:08,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 11 remaining) [2023-08-30 14:10:08,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 11 remaining) [2023-08-30 14:10:08,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 11 remaining) [2023-08-30 14:10:08,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 11 remaining) [2023-08-30 14:10:08,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 11 remaining) [2023-08-30 14:10:08,979 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 11 remaining) [2023-08-30 14:10:08,979 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 11 remaining) [2023-08-30 14:10:08,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 14:10:08,979 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 14:10:08,979 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 14:10:08,980 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 14:10:08,993 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 14:10:08,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 238 transitions, 536 flow [2023-08-30 14:10:09,069 INFO L130 PetriNetUnfolder]: 161/1233 cut-off events. [2023-08-30 14:10:09,069 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 14:10:09,077 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 14:10:09,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 238 transitions, 536 flow [2023-08-30 14:10:09,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 238 transitions, 536 flow [2023-08-30 14:10:09,081 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 14:10:09,081 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 238 transitions, 536 flow [2023-08-30 14:10:09,081 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 238 transitions, 536 flow [2023-08-30 14:10:09,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 238 transitions, 536 flow [2023-08-30 14:10:09,155 INFO L130 PetriNetUnfolder]: 161/1233 cut-off events. [2023-08-30 14:10:09,155 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 14:10:09,162 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 14:10:09,178 INFO L119 LiptonReduction]: Number of co-enabled transitions 27360 [2023-08-30 14:10:12,134 INFO L134 LiptonReduction]: Checked pairs total: 45304 [2023-08-30 14:10:12,134 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-08-30 14:10:12,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 14:10:12,135 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;@1c033023, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 14:10:12,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 14:10:12,137 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-30 14:10:12,137 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 14:10:12,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:10:12,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 14:10:12,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-08-30 14:10:12,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:10:12,138 INFO L85 PathProgramCache]: Analyzing trace with hash 66931248, now seen corresponding path program 1 times [2023-08-30 14:10:12,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:10:12,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790181980] [2023-08-30 14:10:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:10:12,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:10:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:10:12,154 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 14:10:12,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:10:12,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790181980] [2023-08-30 14:10:12,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790181980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 14:10:12,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 14:10:12,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 14:10:12,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992033142] [2023-08-30 14:10:12,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 14:10:12,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 14:10:12,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:10:12,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 14:10:12,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 14:10:12,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 437 [2023-08-30 14:10:12,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 89 transitions, 238 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 14:10:12,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:10:12,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 437 [2023-08-30 14:10:12,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:11:08,756 INFO L130 PetriNetUnfolder]: 800849/1019087 cut-off events. [2023-08-30 14:11:08,757 INFO L131 PetriNetUnfolder]: For 45741/45741 co-relation queries the response was YES. [2023-08-30 14:11:10,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2050814 conditions, 1019087 events. 800849/1019087 cut-off events. For 45741/45741 co-relation queries the response was YES. Maximal size of possible extension queue 21950. Compared 6882307 event pairs, 612835 based on Foata normal form. 113975/999017 useless extension candidates. Maximal degree in co-relation 270863. Up to 1010374 conditions per place.