./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.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 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 10:04:43,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 10:04:43,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 10:04:43,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 10:04:43,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 10:04:43,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 10:04:43,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 10:04:43,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 10:04:43,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 10:04:43,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 10:04:43,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 10:04:43,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 10:04:43,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 10:04:43,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 10:04:43,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 10:04:43,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 10:04:43,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 10:04:43,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 10:04:43,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 10:04:43,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 10:04:43,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 10:04:43,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 10:04:43,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 10:04:43,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 10:04:43,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 10:04:43,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 10:04:43,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 10:04:43,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 10:04:43,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 10:04:43,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 10:04:43,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 10:04:43,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 10:04:43,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 10:04:43,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 10:04:43,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 10:04:43,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 10:04:43,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 10:04:43,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 10:04:43,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 10:04:43,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 10:04:43,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 10:04:43,410 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 10:04:43,443 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 10:04:43,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 10:04:43,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 10:04:43,444 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 10:04:43,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 10:04:43,445 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 10:04:43,445 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 10:04:43,445 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 10:04:43,445 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 10:04:43,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 10:04:43,447 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 10:04:43,447 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 10:04:43,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 10:04:43,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 10:04:43,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 10:04:43,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 10:04:43,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 10:04:43,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 10:04:43,448 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 10:04:43,448 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 10:04:43,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 10:04:43,449 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 10:04:43,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 10:04:43,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 10:04:43,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 10:04:43,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 10:04:43,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 10:04:43,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 10:04:43,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 10:04:43,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 10:04:43,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 10:04:43,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 10:04:43,451 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 10:04:43,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 10:04:43,451 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 10:04:43,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 10:04:43,452 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 10:04:43,452 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 10:04:43,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 10:04:43,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 10:04:43,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 10:04:43,780 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 10:04:43,780 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 10:04:43,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-08-30 10:04:44,942 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 10:04:45,172 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 10:04:45,172 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-08-30 10:04:45,185 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0701add8/39b9656136ff41c0804c14f09ba106b5/FLAGc828a20b2 [2023-08-30 10:04:45,197 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0701add8/39b9656136ff41c0804c14f09ba106b5 [2023-08-30 10:04:45,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 10:04:45,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 10:04:45,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 10:04:45,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 10:04:45,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 10:04:45,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:04:45" (1/1) ... [2023-08-30 10:04:45,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b91d3aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:45, skipping insertion in model container [2023-08-30 10:04:45,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:04:45" (1/1) ... [2023-08-30 10:04:45,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 10:04:45,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 10:04:45,523 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_20-callback_racefree.i[30212,30225] [2023-08-30 10:04:45,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 10:04:45,570 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 10:04:45,603 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_20-callback_racefree.i[30212,30225] [2023-08-30 10:04:45,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 10:04:45,639 WARN L667 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 10:04:45,644 INFO L208 MainTranslator]: Completed translation [2023-08-30 10:04:45,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:45 WrapperNode [2023-08-30 10:04:45,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 10:04:45,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 10:04:45,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 10:04:45,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 10:04:45,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:45" (1/1) ... [2023-08-30 10:04:45,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:45" (1/1) ... [2023-08-30 10:04:45,682 INFO L138 Inliner]: procedures = 173, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 145 [2023-08-30 10:04:45,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 10:04:45,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 10:04:45,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 10:04:45,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 10:04:45,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:45" (1/1) ... [2023-08-30 10:04:45,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:45" (1/1) ... [2023-08-30 10:04:45,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:45" (1/1) ... [2023-08-30 10:04:45,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:45" (1/1) ... [2023-08-30 10:04:45,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:45" (1/1) ... [2023-08-30 10:04:45,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:45" (1/1) ... [2023-08-30 10:04:45,705 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:45" (1/1) ... [2023-08-30 10:04:45,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:45" (1/1) ... [2023-08-30 10:04:45,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 10:04:45,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 10:04:45,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 10:04:45,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 10:04:45,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:45" (1/1) ... [2023-08-30 10:04:45,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 10:04:45,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:04:45,759 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 10:04:45,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 10:04:45,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 10:04:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 10:04:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 10:04:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 10:04:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 10:04:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 10:04:45,815 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 10:04:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 10:04:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 10:04:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 10:04:45,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 10:04:45,816 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 10:04:45,922 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 10:04:45,923 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 10:04:46,208 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 10:04:46,215 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 10:04:46,228 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-30 10:04:46,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:04:46 BoogieIcfgContainer [2023-08-30 10:04:46,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 10:04:46,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 10:04:46,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 10:04:46,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 10:04:46,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:04:45" (1/3) ... [2023-08-30 10:04:46,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274e3e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:04:46, skipping insertion in model container [2023-08-30 10:04:46,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:45" (2/3) ... [2023-08-30 10:04:46,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274e3e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:04:46, skipping insertion in model container [2023-08-30 10:04:46,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:04:46" (3/3) ... [2023-08-30 10:04:46,238 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2023-08-30 10:04:46,245 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 10:04:46,262 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 10:04:46,262 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 10:04:46,263 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 10:04:46,369 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 10:04:46,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 156 transitions, 320 flow [2023-08-30 10:04:46,543 INFO L130 PetriNetUnfolder]: 26/238 cut-off events. [2023-08-30 10:04:46,543 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:04:46,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 238 events. 26/238 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 690 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 117. Up to 6 conditions per place. [2023-08-30 10:04:46,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 156 transitions, 320 flow [2023-08-30 10:04:46,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 153 transitions, 314 flow [2023-08-30 10:04:46,560 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:04:46,580 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 153 transitions, 314 flow [2023-08-30 10:04:46,584 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 153 transitions, 314 flow [2023-08-30 10:04:46,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 153 transitions, 314 flow [2023-08-30 10:04:46,642 INFO L130 PetriNetUnfolder]: 25/235 cut-off events. [2023-08-30 10:04:46,643 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:04:46,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 235 events. 25/235 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 676 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 117. Up to 6 conditions per place. [2023-08-30 10:04:46,648 INFO L119 LiptonReduction]: Number of co-enabled transitions 3496 [2023-08-30 10:04:50,110 INFO L134 LiptonReduction]: Checked pairs total: 5220 [2023-08-30 10:04:50,111 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-30 10:04:50,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:04:50,128 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;@3c14b9f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:04:50,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 10:04:50,132 INFO L130 PetriNetUnfolder]: 2/10 cut-off events. [2023-08-30 10:04:50,133 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:04:50,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:50,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 10:04:50,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:50,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:50,138 INFO L85 PathProgramCache]: Analyzing trace with hash 17559726, now seen corresponding path program 1 times [2023-08-30 10:04:50,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:50,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066171852] [2023-08-30 10:04:50,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:50,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:50,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:50,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066171852] [2023-08-30 10:04:50,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066171852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:04:50,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:04:50,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:04:50,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624420700] [2023-08-30 10:04:50,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:04:50,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:04:50,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:50,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:04:50,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:04:50,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 298 [2023-08-30 10:04:50,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:50,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:50,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 298 [2023-08-30 10:04:50,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:50,526 INFO L130 PetriNetUnfolder]: 78/180 cut-off events. [2023-08-30 10:04:50,527 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:04:50,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 180 events. 78/180 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 679 event pairs, 48 based on Foata normal form. 23/162 useless extension candidates. Maximal degree in co-relation 339. Up to 167 conditions per place. [2023-08-30 10:04:50,532 INFO L137 encePairwiseOnDemand]: 284/298 looper letters, 30 selfloop transitions, 2 changer transitions 2/37 dead transitions. [2023-08-30 10:04:50,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 148 flow [2023-08-30 10:04:50,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:04:50,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:04:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-30 10:04:50,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123042505592841 [2023-08-30 10:04:50,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-30 10:04:50,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-30 10:04:50,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:50,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-30 10:04:50,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:50,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:50,564 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:50,565 INFO L175 Difference]: Start difference. First operand has 36 places, 43 transitions, 94 flow. Second operand 3 states and 458 transitions. [2023-08-30 10:04:50,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 148 flow [2023-08-30 10:04:50,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:04:50,570 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 76 flow [2023-08-30 10:04:50,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-30 10:04:50,574 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-08-30 10:04:50,574 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 76 flow [2023-08-30 10:04:50,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:50,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:50,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:04:50,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 10:04:50,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:50,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:50,576 INFO L85 PathProgramCache]: Analyzing trace with hash -862267680, now seen corresponding path program 1 times [2023-08-30 10:04:50,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:50,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319946595] [2023-08-30 10:04:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:50,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:50,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:50,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319946595] [2023-08-30 10:04:50,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319946595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:04:50,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859460511] [2023-08-30 10:04:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:50,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:50,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:04:50,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:04:50,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 10:04:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:50,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 10:04:50,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:04:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:50,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:04:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:50,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859460511] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:04:50,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:04:50,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 10:04:50,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969617909] [2023-08-30 10:04:50,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:04:50,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:04:50,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:50,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:04:50,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 10:04:50,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 298 [2023-08-30 10:04:50,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 138.14285714285714) internal successors, (967), 7 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:50,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:50,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 298 [2023-08-30 10:04:50,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:51,035 INFO L130 PetriNetUnfolder]: 8/26 cut-off events. [2023-08-30 10:04:51,035 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 10:04:51,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 26 events. 8/26 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 5/31 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2023-08-30 10:04:51,035 INFO L137 encePairwiseOnDemand]: 295/298 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2023-08-30 10:04:51,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 14 transitions, 63 flow [2023-08-30 10:04:51,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:04:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:04:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 558 transitions. [2023-08-30 10:04:51,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46812080536912754 [2023-08-30 10:04:51,039 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 558 transitions. [2023-08-30 10:04:51,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 558 transitions. [2023-08-30 10:04:51,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:51,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 558 transitions. [2023-08-30 10:04:51,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:51,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:51,044 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:51,045 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 76 flow. Second operand 4 states and 558 transitions. [2023-08-30 10:04:51,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 14 transitions, 63 flow [2023-08-30 10:04:51,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 14 transitions, 57 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 10:04:51,046 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-30 10:04:51,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-30 10:04:51,046 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -21 predicate places. [2023-08-30 10:04:51,047 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-30 10:04:51,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.14285714285714) internal successors, (967), 7 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:51,049 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2023-08-30 10:04:51,050 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2023-08-30 10:04:51,050 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2023-08-30 10:04:51,050 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2023-08-30 10:04:51,050 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2023-08-30 10:04:51,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2023-08-30 10:04:51,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2023-08-30 10:04:51,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2023-08-30 10:04:51,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2023-08-30 10:04:51,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2023-08-30 10:04:51,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 10:04:51,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:51,257 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 10:04:51,259 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:04:51,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 156 transitions, 320 flow [2023-08-30 10:04:51,281 INFO L130 PetriNetUnfolder]: 26/238 cut-off events. [2023-08-30 10:04:51,281 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:04:51,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 238 events. 26/238 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 690 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 117. Up to 6 conditions per place. [2023-08-30 10:04:51,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 156 transitions, 320 flow [2023-08-30 10:04:51,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 147 transitions, 299 flow [2023-08-30 10:04:51,283 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:04:51,284 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 147 transitions, 299 flow [2023-08-30 10:04:51,284 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 147 transitions, 299 flow [2023-08-30 10:04:51,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 147 transitions, 299 flow [2023-08-30 10:04:51,300 INFO L130 PetriNetUnfolder]: 25/229 cut-off events. [2023-08-30 10:04:51,300 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:04:51,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 229 events. 25/229 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 620 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 117. Up to 6 conditions per place. [2023-08-30 10:04:51,303 INFO L119 LiptonReduction]: Number of co-enabled transitions 3496 [2023-08-30 10:04:54,214 INFO L134 LiptonReduction]: Checked pairs total: 4816 [2023-08-30 10:04:54,214 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-08-30 10:04:54,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:04:54,217 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;@3c14b9f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:04:54,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:04:54,220 INFO L130 PetriNetUnfolder]: 3/27 cut-off events. [2023-08-30 10:04:54,220 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:04:54,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:54,221 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 10:04:54,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:04:54,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:54,221 INFO L85 PathProgramCache]: Analyzing trace with hash -548253347, now seen corresponding path program 1 times [2023-08-30 10:04:54,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:54,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768911328] [2023-08-30 10:04:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:54,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:04:54,264 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:04:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:04:54,297 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:04:54,297 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:04:54,298 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:04:54,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 10:04:54,298 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:04:54,299 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:04:54,299 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:04:54,299 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 10:04:54,323 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 10:04:54,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 177 transitions, 372 flow [2023-08-30 10:04:54,379 INFO L130 PetriNetUnfolder]: 43/377 cut-off events. [2023-08-30 10:04:54,380 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:04:54,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 377 events. 43/377 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1411 event pairs, 0 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 240. Up to 9 conditions per place. [2023-08-30 10:04:54,381 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 177 transitions, 372 flow [2023-08-30 10:04:54,383 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 177 transitions, 372 flow [2023-08-30 10:04:54,383 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:04:54,384 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 177 transitions, 372 flow [2023-08-30 10:04:54,384 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 177 transitions, 372 flow [2023-08-30 10:04:54,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 177 transitions, 372 flow [2023-08-30 10:04:54,415 INFO L130 PetriNetUnfolder]: 43/377 cut-off events. [2023-08-30 10:04:54,415 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:04:54,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 377 events. 43/377 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1411 event pairs, 0 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 240. Up to 9 conditions per place. [2023-08-30 10:04:54,422 INFO L119 LiptonReduction]: Number of co-enabled transitions 8436 [2023-08-30 10:04:57,401 INFO L134 LiptonReduction]: Checked pairs total: 13272 [2023-08-30 10:04:57,402 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-08-30 10:04:57,403 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:04:57,404 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;@3c14b9f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:04:57,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 10:04:57,406 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 10:04:57,406 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:04:57,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:57,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 10:04:57,407 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:57,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:57,407 INFO L85 PathProgramCache]: Analyzing trace with hash 32549163, now seen corresponding path program 1 times [2023-08-30 10:04:57,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:57,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823444364] [2023-08-30 10:04:57,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:57,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:57,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:57,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823444364] [2023-08-30 10:04:57,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823444364] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:04:57,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:04:57,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:04:57,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518785536] [2023-08-30 10:04:57,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:04:57,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:04:57,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:57,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:04:57,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:04:57,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 329 [2023-08-30 10:04:57,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 58 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:57,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:57,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 329 [2023-08-30 10:04:57,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:57,730 INFO L130 PetriNetUnfolder]: 1795/2981 cut-off events. [2023-08-30 10:04:57,731 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-08-30 10:04:57,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5961 conditions, 2981 events. 1795/2981 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 16127 event pairs, 765 based on Foata normal form. 204/2469 useless extension candidates. Maximal degree in co-relation 1049. Up to 2916 conditions per place. [2023-08-30 10:04:57,746 INFO L137 encePairwiseOnDemand]: 313/329 looper letters, 47 selfloop transitions, 2 changer transitions 2/55 dead transitions. [2023-08-30 10:04:57,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 228 flow [2023-08-30 10:04:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:04:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:04:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-08-30 10:04:57,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5298885511651469 [2023-08-30 10:04:57,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-08-30 10:04:57,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-08-30 10:04:57,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:57,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-08-30 10:04:57,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:57,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:57,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:57,755 INFO L175 Difference]: Start difference. First operand has 48 places, 58 transitions, 134 flow. Second operand 3 states and 523 transitions. [2023-08-30 10:04:57,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 228 flow [2023-08-30 10:04:57,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:04:57,758 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 120 flow [2023-08-30 10:04:57,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-30 10:04:57,760 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2023-08-30 10:04:57,760 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 120 flow [2023-08-30 10:04:57,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:57,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:57,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:04:57,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 10:04:57,761 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:57,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:57,762 INFO L85 PathProgramCache]: Analyzing trace with hash -772468729, now seen corresponding path program 1 times [2023-08-30 10:04:57,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:57,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455947548] [2023-08-30 10:04:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:57,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:57,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:57,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455947548] [2023-08-30 10:04:57,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455947548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:04:57,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664908165] [2023-08-30 10:04:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:57,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:57,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:04:57,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:04:57,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 10:04:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:57,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 10:04:57,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:04:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:57,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:04:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:57,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664908165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:04:57,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:04:57,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 10:04:57,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006593471] [2023-08-30 10:04:57,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:04:57,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:04:57,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:57,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:04:57,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 10:04:58,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 329 [2023-08-30 10:04:58,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 120 flow. Second operand has 7 states, 7 states have (on average 153.14285714285714) internal successors, (1072), 7 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:58,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:58,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 329 [2023-08-30 10:04:58,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:58,112 INFO L130 PetriNetUnfolder]: 261/460 cut-off events. [2023-08-30 10:04:58,112 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-30 10:04:58,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1040 conditions, 460 events. 261/460 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1813 event pairs, 0 based on Foata normal form. 49/439 useless extension candidates. Maximal degree in co-relation 200. Up to 226 conditions per place. [2023-08-30 10:04:58,114 INFO L137 encePairwiseOnDemand]: 324/329 looper letters, 32 selfloop transitions, 3 changer transitions 13/49 dead transitions. [2023-08-30 10:04:58,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 49 transitions, 212 flow [2023-08-30 10:04:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 10:04:58,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 10:04:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 957 transitions. [2023-08-30 10:04:58,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4848024316109423 [2023-08-30 10:04:58,118 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 957 transitions. [2023-08-30 10:04:58,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 957 transitions. [2023-08-30 10:04:58,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:58,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 957 transitions. [2023-08-30 10:04:58,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.5) internal successors, (957), 6 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:58,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:58,125 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:58,125 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 120 flow. Second operand 6 states and 957 transitions. [2023-08-30 10:04:58,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 49 transitions, 212 flow [2023-08-30 10:04:58,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 49 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:04:58,127 INFO L231 Difference]: Finished difference. Result has 30 places, 18 transitions, 56 flow [2023-08-30 10:04:58,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=56, PETRI_PLACES=30, PETRI_TRANSITIONS=18} [2023-08-30 10:04:58,128 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -18 predicate places. [2023-08-30 10:04:58,128 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 18 transitions, 56 flow [2023-08-30 10:04:58,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 153.14285714285714) internal successors, (1072), 7 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:58,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:04:58,129 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:04:58,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 10:04:58,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:58,335 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:04:58,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:04:58,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1823269648, now seen corresponding path program 1 times [2023-08-30 10:04:58,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:04:58,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424785721] [2023-08-30 10:04:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:58,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:04:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:58,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:04:58,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424785721] [2023-08-30 10:04:58,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424785721] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:04:58,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906339426] [2023-08-30 10:04:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:04:58,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:58,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:04:58,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:04:58,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 10:04:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:04:58,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 10:04:58,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:04:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:04:58,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:04:58,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906339426] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:04:58,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:04:58,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-30 10:04:58,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145241052] [2023-08-30 10:04:58,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:04:58,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:04:58,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:04:58,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:04:58,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 10:04:58,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 329 [2023-08-30 10:04:58,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 18 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:58,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:04:58,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 329 [2023-08-30 10:04:58,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:04:58,538 INFO L130 PetriNetUnfolder]: 48/121 cut-off events. [2023-08-30 10:04:58,538 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2023-08-30 10:04:58,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 121 events. 48/121 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 355 event pairs, 0 based on Foata normal form. 42/153 useless extension candidates. Maximal degree in co-relation 89. Up to 104 conditions per place. [2023-08-30 10:04:58,539 INFO L137 encePairwiseOnDemand]: 326/329 looper letters, 0 selfloop transitions, 0 changer transitions 24/24 dead transitions. [2023-08-30 10:04:58,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 24 transitions, 110 flow [2023-08-30 10:04:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:04:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:04:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 632 transitions. [2023-08-30 10:04:58,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48024316109422494 [2023-08-30 10:04:58,541 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 632 transitions. [2023-08-30 10:04:58,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 632 transitions. [2023-08-30 10:04:58,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:04:58,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 632 transitions. [2023-08-30 10:04:58,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:58,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 329.0) internal successors, (1645), 5 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:58,546 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 329.0) internal successors, (1645), 5 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:58,546 INFO L175 Difference]: Start difference. First operand has 30 places, 18 transitions, 56 flow. Second operand 4 states and 632 transitions. [2023-08-30 10:04:58,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 24 transitions, 110 flow [2023-08-30 10:04:58,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 104 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 10:04:58,547 INFO L231 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2023-08-30 10:04:58,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2023-08-30 10:04:58,549 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -22 predicate places. [2023-08-30 10:04:58,549 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2023-08-30 10:04:58,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:04:58,550 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2023-08-30 10:04:58,550 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2023-08-30 10:04:58,550 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2023-08-30 10:04:58,550 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2023-08-30 10:04:58,550 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2023-08-30 10:04:58,551 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2023-08-30 10:04:58,551 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2023-08-30 10:04:58,551 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2023-08-30 10:04:58,551 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2023-08-30 10:04:58,551 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2023-08-30 10:04:58,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 10:04:58,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:04:58,757 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 10:04:58,758 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:04:58,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 177 transitions, 372 flow [2023-08-30 10:04:58,785 INFO L130 PetriNetUnfolder]: 43/377 cut-off events. [2023-08-30 10:04:58,786 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:04:58,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 377 events. 43/377 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1411 event pairs, 0 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 240. Up to 9 conditions per place. [2023-08-30 10:04:58,787 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 177 transitions, 372 flow [2023-08-30 10:04:58,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 177 transitions, 372 flow [2023-08-30 10:04:58,789 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:04:58,789 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 177 transitions, 372 flow [2023-08-30 10:04:58,789 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 177 transitions, 372 flow [2023-08-30 10:04:58,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 177 transitions, 372 flow [2023-08-30 10:04:58,812 INFO L130 PetriNetUnfolder]: 43/377 cut-off events. [2023-08-30 10:04:58,813 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:04:58,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 377 events. 43/377 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1411 event pairs, 0 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 240. Up to 9 conditions per place. [2023-08-30 10:04:58,819 INFO L119 LiptonReduction]: Number of co-enabled transitions 8436 [2023-08-30 10:05:01,796 INFO L134 LiptonReduction]: Checked pairs total: 13154 [2023-08-30 10:05:01,796 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-30 10:05:01,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:05:01,799 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;@3c14b9f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:05:01,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:05:01,805 INFO L130 PetriNetUnfolder]: 22/89 cut-off events. [2023-08-30 10:05:01,806 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 10:05:01,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:01,806 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 10:05:01,806 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:05:01,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:01,806 INFO L85 PathProgramCache]: Analyzing trace with hash 760683279, now seen corresponding path program 1 times [2023-08-30 10:05:01,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:01,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813368858] [2023-08-30 10:05:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:01,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:05:01,828 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:05:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:05:01,846 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:05:01,847 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:05:01,847 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:05:01,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 10:05:01,847 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:05:01,848 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:05:01,848 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:05:01,848 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 10:05:01,865 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 10:05:01,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 198 transitions, 426 flow [2023-08-30 10:05:01,912 INFO L130 PetriNetUnfolder]: 65/555 cut-off events. [2023-08-30 10:05:01,912 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 10:05:01,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 555 events. 65/555 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2309 event pairs, 1 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 385. Up to 16 conditions per place. [2023-08-30 10:05:01,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 198 transitions, 426 flow [2023-08-30 10:05:01,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 198 transitions, 426 flow [2023-08-30 10:05:01,919 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:05:01,919 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 198 transitions, 426 flow [2023-08-30 10:05:01,919 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 198 transitions, 426 flow [2023-08-30 10:05:01,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 198 transitions, 426 flow [2023-08-30 10:05:01,966 INFO L130 PetriNetUnfolder]: 65/555 cut-off events. [2023-08-30 10:05:01,966 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 10:05:01,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 555 events. 65/555 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2309 event pairs, 1 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 385. Up to 16 conditions per place. [2023-08-30 10:05:01,982 INFO L119 LiptonReduction]: Number of co-enabled transitions 13908 [2023-08-30 10:05:04,988 INFO L134 LiptonReduction]: Checked pairs total: 21657 [2023-08-30 10:05:04,988 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-08-30 10:05:04,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:05:04,990 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;@3c14b9f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:05:04,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 10:05:04,991 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 10:05:04,991 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:05:04,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:04,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 10:05:04,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:05:04,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash 49202525, now seen corresponding path program 1 times [2023-08-30 10:05:04,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:04,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481227168] [2023-08-30 10:05:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:04,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:05:05,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:05:05,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481227168] [2023-08-30 10:05:05,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481227168] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:05:05,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:05:05,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:05:05,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796728219] [2023-08-30 10:05:05,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:05:05,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:05:05,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:05:05,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:05:05,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:05:05,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 367 [2023-08-30 10:05:05,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 67 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:05,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:05:05,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 367 [2023-08-30 10:05:05,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:05:06,586 INFO L130 PetriNetUnfolder]: 13999/20241 cut-off events. [2023-08-30 10:05:06,586 INFO L131 PetriNetUnfolder]: For 520/520 co-relation queries the response was YES. [2023-08-30 10:05:06,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40621 conditions, 20241 events. 13999/20241 cut-off events. For 520/520 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 122033 event pairs, 8909 based on Foata normal form. 2116/18584 useless extension candidates. Maximal degree in co-relation 5942. Up to 20026 conditions per place. [2023-08-30 10:05:06,696 INFO L137 encePairwiseOnDemand]: 349/367 looper letters, 51 selfloop transitions, 2 changer transitions 2/60 dead transitions. [2023-08-30 10:05:06,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 258 flow [2023-08-30 10:05:06,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:05:06,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:05:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-08-30 10:05:06,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204359673024523 [2023-08-30 10:05:06,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-08-30 10:05:06,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-08-30 10:05:06,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:05:06,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-08-30 10:05:06,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:06,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:06,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:06,703 INFO L175 Difference]: Start difference. First operand has 56 places, 67 transitions, 164 flow. Second operand 3 states and 573 transitions. [2023-08-30 10:05:06,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 258 flow [2023-08-30 10:05:06,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 258 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:05:06,708 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 144 flow [2023-08-30 10:05:06,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2023-08-30 10:05:06,710 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-30 10:05:06,710 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 144 flow [2023-08-30 10:05:06,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:06,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:06,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:05:06,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 10:05:06,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:05:06,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:06,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1501422475, now seen corresponding path program 1 times [2023-08-30 10:05:06,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:06,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219564285] [2023-08-30 10:05:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:06,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:05:06,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:05:06,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219564285] [2023-08-30 10:05:06,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219564285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:05:06,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169465914] [2023-08-30 10:05:06,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:06,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:05:06,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:05:06,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:05:06,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 10:05:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:06,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 10:05:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:05:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:05:06,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:05:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:05:06,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169465914] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:05:06,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:05:06,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 10:05:06,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035193840] [2023-08-30 10:05:06,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:05:06,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:05:06,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:05:06,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:05:06,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 10:05:06,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 367 [2023-08-30 10:05:06,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 144 flow. Second operand has 7 states, 7 states have (on average 168.14285714285714) internal successors, (1177), 7 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:06,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:05:06,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 367 [2023-08-30 10:05:06,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:05:07,166 INFO L130 PetriNetUnfolder]: 2091/3105 cut-off events. [2023-08-30 10:05:07,167 INFO L131 PetriNetUnfolder]: For 340/340 co-relation queries the response was YES. [2023-08-30 10:05:07,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6808 conditions, 3105 events. 2091/3105 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14981 event pairs, 0 based on Foata normal form. 245/2989 useless extension candidates. Maximal degree in co-relation 1431. Up to 1466 conditions per place. [2023-08-30 10:05:07,178 INFO L137 encePairwiseOnDemand]: 362/367 looper letters, 49 selfloop transitions, 5 changer transitions 17/73 dead transitions. [2023-08-30 10:05:07,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 73 transitions, 317 flow [2023-08-30 10:05:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:05:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:05:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1238 transitions. [2023-08-30 10:05:07,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48189957181782794 [2023-08-30 10:05:07,182 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1238 transitions. [2023-08-30 10:05:07,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1238 transitions. [2023-08-30 10:05:07,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:05:07,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1238 transitions. [2023-08-30 10:05:07,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 176.85714285714286) internal successors, (1238), 7 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:07,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 367.0) internal successors, (2936), 8 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:07,189 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 367.0) internal successors, (2936), 8 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:07,189 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 144 flow. Second operand 7 states and 1238 transitions. [2023-08-30 10:05:07,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 73 transitions, 317 flow [2023-08-30 10:05:07,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 73 transitions, 313 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 10:05:07,194 INFO L231 Difference]: Finished difference. Result has 39 places, 26 transitions, 85 flow [2023-08-30 10:05:07,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=85, PETRI_PLACES=39, PETRI_TRANSITIONS=26} [2023-08-30 10:05:07,195 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -17 predicate places. [2023-08-30 10:05:07,195 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 26 transitions, 85 flow [2023-08-30 10:05:07,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 168.14285714285714) internal successors, (1177), 7 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:07,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:07,195 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:05:07,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 10:05:07,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:05:07,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:05:07,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:07,401 INFO L85 PathProgramCache]: Analyzing trace with hash -700452347, now seen corresponding path program 1 times [2023-08-30 10:05:07,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:07,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164642566] [2023-08-30 10:05:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:07,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:05:07,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:05:07,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164642566] [2023-08-30 10:05:07,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164642566] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:05:07,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:05:07,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:05:07,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296294297] [2023-08-30 10:05:07,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:05:07,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:05:07,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:05:07,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:05:07,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:05:07,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 367 [2023-08-30 10:05:07,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 26 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:07,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:05:07,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 367 [2023-08-30 10:05:07,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:05:07,531 INFO L130 PetriNetUnfolder]: 473/817 cut-off events. [2023-08-30 10:05:07,532 INFO L131 PetriNetUnfolder]: For 832/832 co-relation queries the response was YES. [2023-08-30 10:05:07,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1793 conditions, 817 events. 473/817 cut-off events. For 832/832 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3571 event pairs, 473 based on Foata normal form. 210/996 useless extension candidates. Maximal degree in co-relation 967. Up to 790 conditions per place. [2023-08-30 10:05:07,534 INFO L137 encePairwiseOnDemand]: 365/367 looper letters, 0 selfloop transitions, 0 changer transitions 24/24 dead transitions. [2023-08-30 10:05:07,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 24 transitions, 117 flow [2023-08-30 10:05:07,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:05:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:05:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-08-30 10:05:07,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750227066303361 [2023-08-30 10:05:07,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-08-30 10:05:07,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-08-30 10:05:07,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:05:07,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-08-30 10:05:07,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:07,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:07,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:07,540 INFO L175 Difference]: Start difference. First operand has 39 places, 26 transitions, 85 flow. Second operand 3 states and 523 transitions. [2023-08-30 10:05:07,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 24 transitions, 117 flow [2023-08-30 10:05:07,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 24 transitions, 109 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 10:05:07,541 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-08-30 10:05:07,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-08-30 10:05:07,542 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -22 predicate places. [2023-08-30 10:05:07,543 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-08-30 10:05:07,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:07,543 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2023-08-30 10:05:07,543 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2023-08-30 10:05:07,543 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2023-08-30 10:05:07,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2023-08-30 10:05:07,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2023-08-30 10:05:07,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2023-08-30 10:05:07,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2023-08-30 10:05:07,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2023-08-30 10:05:07,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2023-08-30 10:05:07,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2023-08-30 10:05:07,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 10:05:07,545 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 10:05:07,546 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:05:07,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 198 transitions, 426 flow [2023-08-30 10:05:07,592 INFO L130 PetriNetUnfolder]: 65/555 cut-off events. [2023-08-30 10:05:07,593 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 10:05:07,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 555 events. 65/555 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2309 event pairs, 1 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 385. Up to 16 conditions per place. [2023-08-30 10:05:07,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 198 transitions, 426 flow [2023-08-30 10:05:07,598 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 198 transitions, 426 flow [2023-08-30 10:05:07,598 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:05:07,599 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 198 transitions, 426 flow [2023-08-30 10:05:07,599 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 198 transitions, 426 flow [2023-08-30 10:05:07,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 198 transitions, 426 flow [2023-08-30 10:05:07,641 INFO L130 PetriNetUnfolder]: 65/555 cut-off events. [2023-08-30 10:05:07,641 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 10:05:07,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 555 events. 65/555 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2309 event pairs, 1 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 385. Up to 16 conditions per place. [2023-08-30 10:05:07,652 INFO L119 LiptonReduction]: Number of co-enabled transitions 13908 [2023-08-30 10:05:11,043 INFO L134 LiptonReduction]: Checked pairs total: 23554 [2023-08-30 10:05:11,043 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-08-30 10:05:11,044 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:05:11,045 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;@3c14b9f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:05:11,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:05:11,054 INFO L130 PetriNetUnfolder]: 32/134 cut-off events. [2023-08-30 10:05:11,054 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 10:05:11,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:11,054 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 10:05:11,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:05:11,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:11,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1248918374, now seen corresponding path program 1 times [2023-08-30 10:05:11,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:11,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875827365] [2023-08-30 10:05:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:11,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:05:11,074 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:05:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:05:11,089 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:05:11,089 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:05:11,090 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:05:11,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 10:05:11,090 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:05:11,092 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:05:11,092 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:05:11,092 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 10:05:11,112 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 10:05:11,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 219 transitions, 482 flow [2023-08-30 10:05:11,183 INFO L130 PetriNetUnfolder]: 99/813 cut-off events. [2023-08-30 10:05:11,184 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 10:05:11,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 813 events. 99/813 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3723 event pairs, 6 based on Foata normal form. 0/646 useless extension candidates. Maximal degree in co-relation 575. Up to 32 conditions per place. [2023-08-30 10:05:11,191 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 219 transitions, 482 flow [2023-08-30 10:05:11,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 219 transitions, 482 flow [2023-08-30 10:05:11,196 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:05:11,196 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 219 transitions, 482 flow [2023-08-30 10:05:11,196 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 219 transitions, 482 flow [2023-08-30 10:05:11,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 219 transitions, 482 flow [2023-08-30 10:05:11,282 INFO L130 PetriNetUnfolder]: 99/813 cut-off events. [2023-08-30 10:05:11,282 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 10:05:11,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 813 events. 99/813 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3723 event pairs, 6 based on Foata normal form. 0/646 useless extension candidates. Maximal degree in co-relation 575. Up to 32 conditions per place. [2023-08-30 10:05:11,297 INFO L119 LiptonReduction]: Number of co-enabled transitions 20216 [2023-08-30 10:05:14,582 INFO L134 LiptonReduction]: Checked pairs total: 33425 [2023-08-30 10:05:14,582 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-30 10:05:14,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:05:14,584 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;@3c14b9f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:05:14,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 10:05:14,585 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 10:05:14,585 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:05:14,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:14,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 10:05:14,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:05:14,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:14,586 INFO L85 PathProgramCache]: Analyzing trace with hash 67457432, now seen corresponding path program 1 times [2023-08-30 10:05:14,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:14,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537318978] [2023-08-30 10:05:14,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:14,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:05:14,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:05:14,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537318978] [2023-08-30 10:05:14,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537318978] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:05:14,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:05:14,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:05:14,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771250027] [2023-08-30 10:05:14,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:05:14,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:05:14,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:05:14,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:05:14,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:05:14,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 403 [2023-08-30 10:05:14,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 82 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:14,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:05:14,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 403 [2023-08-30 10:05:14,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:05:23,129 INFO L130 PetriNetUnfolder]: 105303/146113 cut-off events. [2023-08-30 10:05:23,129 INFO L131 PetriNetUnfolder]: For 5339/5339 co-relation queries the response was YES. [2023-08-30 10:05:23,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288987 conditions, 146113 events. 105303/146113 cut-off events. For 5339/5339 co-relation queries the response was YES. Maximal size of possible extension queue 4826. Compared 1070350 event pairs, 74938 based on Foata normal form. 33868/145421 useless extension candidates. Maximal degree in co-relation 43154. Up to 139816 conditions per place. [2023-08-30 10:05:23,940 INFO L137 encePairwiseOnDemand]: 380/403 looper letters, 58 selfloop transitions, 2 changer transitions 2/70 dead transitions. [2023-08-30 10:05:23,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 70 transitions, 306 flow [2023-08-30 10:05:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:05:23,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:05:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2023-08-30 10:05:23,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52191894127378 [2023-08-30 10:05:23,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2023-08-30 10:05:23,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2023-08-30 10:05:23,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:05:23,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2023-08-30 10:05:23,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:23,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:23,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:23,948 INFO L175 Difference]: Start difference. First operand has 67 places, 82 transitions, 208 flow. Second operand 3 states and 631 transitions. [2023-08-30 10:05:23,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 70 transitions, 306 flow [2023-08-30 10:05:23,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 70 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:05:23,956 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 174 flow [2023-08-30 10:05:23,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2023-08-30 10:05:23,957 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 2 predicate places. [2023-08-30 10:05:23,957 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 174 flow [2023-08-30 10:05:23,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:23,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:23,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:05:23,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 10:05:23,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:05:23,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:23,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1159762656, now seen corresponding path program 1 times [2023-08-30 10:05:23,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:23,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947851265] [2023-08-30 10:05:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:23,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:05:23,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:05:23,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947851265] [2023-08-30 10:05:23,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947851265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:05:23,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611616580] [2023-08-30 10:05:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:23,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:05:23,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:05:23,997 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:05:24,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 10:05:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:24,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 10:05:24,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:05:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:05:24,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:05:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:05:24,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611616580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:05:24,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:05:24,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 10:05:24,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66921578] [2023-08-30 10:05:24,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:05:24,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:05:24,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:05:24,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:05:24,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 10:05:24,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 403 [2023-08-30 10:05:24,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 183.14285714285714) internal successors, (1282), 7 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:24,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:05:24,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 403 [2023-08-30 10:05:24,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:05:30,238 INFO L130 PetriNetUnfolder]: 86113/117503 cut-off events. [2023-08-30 10:05:30,238 INFO L131 PetriNetUnfolder]: For 3973/3973 co-relation queries the response was YES. [2023-08-30 10:05:30,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237368 conditions, 117503 events. 86113/117503 cut-off events. For 3973/3973 co-relation queries the response was YES. Maximal size of possible extension queue 3919. Compared 804292 event pairs, 1111 based on Foata normal form. 258/93919 useless extension candidates. Maximal degree in co-relation 47999. Up to 97336 conditions per place. [2023-08-30 10:05:30,854 INFO L137 encePairwiseOnDemand]: 397/403 looper letters, 120 selfloop transitions, 8 changer transitions 1/137 dead transitions. [2023-08-30 10:05:30,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 137 transitions, 588 flow [2023-08-30 10:05:30,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:05:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:05:30,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1402 transitions. [2023-08-30 10:05:30,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49698688408365826 [2023-08-30 10:05:30,859 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1402 transitions. [2023-08-30 10:05:30,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1402 transitions. [2023-08-30 10:05:30,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:05:30,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1402 transitions. [2023-08-30 10:05:30,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 200.28571428571428) internal successors, (1402), 7 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:30,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 403.0) internal successors, (3224), 8 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:30,869 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 403.0) internal successors, (3224), 8 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:30,869 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 174 flow. Second operand 7 states and 1402 transitions. [2023-08-30 10:05:30,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 137 transitions, 588 flow [2023-08-30 10:05:30,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 584 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:05:30,878 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 217 flow [2023-08-30 10:05:30,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-08-30 10:05:30,879 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 7 predicate places. [2023-08-30 10:05:30,879 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 217 flow [2023-08-30 10:05:30,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.14285714285714) internal successors, (1282), 7 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:30,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:30,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:05:30,886 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 10:05:31,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 10:05:31,086 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:05:31,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:31,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1592948618, now seen corresponding path program 1 times [2023-08-30 10:05:31,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:31,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216957794] [2023-08-30 10:05:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:31,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:05:31,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:05:31,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216957794] [2023-08-30 10:05:31,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216957794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:05:31,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:05:31,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:05:31,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893649713] [2023-08-30 10:05:31,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:05:31,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:05:31,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:05:31,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:05:31,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:05:31,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 403 [2023-08-30 10:05:31,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:31,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:05:31,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 403 [2023-08-30 10:05:31,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:05:37,538 INFO L130 PetriNetUnfolder]: 78385/106439 cut-off events. [2023-08-30 10:05:37,538 INFO L131 PetriNetUnfolder]: For 25079/25079 co-relation queries the response was YES. [2023-08-30 10:05:37,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220784 conditions, 106439 events. 78385/106439 cut-off events. For 25079/25079 co-relation queries the response was YES. Maximal size of possible extension queue 3657. Compared 712996 event pairs, 76225 based on Foata normal form. 1332/86167 useless extension candidates. Maximal degree in co-relation 28548. Up to 103491 conditions per place. [2023-08-30 10:05:38,078 INFO L137 encePairwiseOnDemand]: 401/403 looper letters, 53 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-08-30 10:05:38,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 62 transitions, 304 flow [2023-08-30 10:05:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:05:38,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:05:38,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 598 transitions. [2023-08-30 10:05:38,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946236559139785 [2023-08-30 10:05:38,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 598 transitions. [2023-08-30 10:05:38,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 598 transitions. [2023-08-30 10:05:38,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:05:38,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 598 transitions. [2023-08-30 10:05:38,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:38,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:38,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:38,086 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 217 flow. Second operand 3 states and 598 transitions. [2023-08-30 10:05:38,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 62 transitions, 304 flow [2023-08-30 10:05:38,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 292 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 10:05:38,103 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 186 flow [2023-08-30 10:05:38,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2023-08-30 10:05:38,104 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 4 predicate places. [2023-08-30 10:05:38,104 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 186 flow [2023-08-30 10:05:38,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:38,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:38,104 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:05:38,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 10:05:38,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:05:38,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:38,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1143065486, now seen corresponding path program 1 times [2023-08-30 10:05:38,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:38,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752185763] [2023-08-30 10:05:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:38,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 10:05:38,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:05:38,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752185763] [2023-08-30 10:05:38,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752185763] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:05:38,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:05:38,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 10:05:38,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842562577] [2023-08-30 10:05:38,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:05:38,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:05:38,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:05:38,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:05:38,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:05:38,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 403 [2023-08-30 10:05:38,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 180.5) internal successors, (722), 4 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:38,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:05:38,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 403 [2023-08-30 10:05:38,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:05:48,014 INFO L130 PetriNetUnfolder]: 129361/173399 cut-off events. [2023-08-30 10:05:48,014 INFO L131 PetriNetUnfolder]: For 16313/16313 co-relation queries the response was YES. [2023-08-30 10:05:48,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351084 conditions, 173399 events. 129361/173399 cut-off events. For 16313/16313 co-relation queries the response was YES. Maximal size of possible extension queue 5976. Compared 1189165 event pairs, 79789 based on Foata normal form. 0/137971 useless extension candidates. Maximal degree in co-relation 351069. Up to 108136 conditions per place. [2023-08-30 10:05:48,919 INFO L137 encePairwiseOnDemand]: 396/403 looper letters, 103 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2023-08-30 10:05:48,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 114 transitions, 504 flow [2023-08-30 10:05:48,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:05:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:05:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 819 transitions. [2023-08-30 10:05:48,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080645161290323 [2023-08-30 10:05:48,921 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 819 transitions. [2023-08-30 10:05:48,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 819 transitions. [2023-08-30 10:05:48,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:05:48,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 819 transitions. [2023-08-30 10:05:48,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:48,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:48,926 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:48,926 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 186 flow. Second operand 4 states and 819 transitions. [2023-08-30 10:05:48,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 114 transitions, 504 flow [2023-08-30 10:05:48,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:05:48,943 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 217 flow [2023-08-30 10:05:48,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-08-30 10:05:48,944 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-08-30 10:05:48,944 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 217 flow [2023-08-30 10:05:48,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.5) internal successors, (722), 4 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:48,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:48,945 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:05:48,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 10:05:48,945 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:05:48,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:48,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1075273495, now seen corresponding path program 1 times [2023-08-30 10:05:48,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:48,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442209312] [2023-08-30 10:05:48,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:48,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 10:05:49,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:05:49,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442209312] [2023-08-30 10:05:49,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442209312] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:05:49,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:05:49,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:05:49,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599010253] [2023-08-30 10:05:49,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:05:49,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:05:49,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:05:49,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:05:49,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:05:49,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 403 [2023-08-30 10:05:49,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:49,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:05:49,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 403 [2023-08-30 10:05:49,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:01,924 INFO L130 PetriNetUnfolder]: 149415/208362 cut-off events. [2023-08-30 10:06:01,924 INFO L131 PetriNetUnfolder]: For 21104/21214 co-relation queries the response was YES. [2023-08-30 10:06:02,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432451 conditions, 208362 events. 149415/208362 cut-off events. For 21104/21214 co-relation queries the response was YES. Maximal size of possible extension queue 6328. Compared 1562526 event pairs, 62654 based on Foata normal form. 0/179855 useless extension candidates. Maximal degree in co-relation 432434. Up to 125954 conditions per place. [2023-08-30 10:06:03,037 INFO L137 encePairwiseOnDemand]: 392/403 looper letters, 91 selfloop transitions, 4 changer transitions 0/103 dead transitions. [2023-08-30 10:06:03,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 103 transitions, 510 flow [2023-08-30 10:06:03,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:06:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:06:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 643 transitions. [2023-08-30 10:06:03,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318444995864351 [2023-08-30 10:06:03,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 643 transitions. [2023-08-30 10:06:03,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 643 transitions. [2023-08-30 10:06:03,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:03,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 643 transitions. [2023-08-30 10:06:03,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:03,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:03,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:03,043 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 217 flow. Second operand 3 states and 643 transitions. [2023-08-30 10:06:03,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 103 transitions, 510 flow [2023-08-30 10:06:03,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 103 transitions, 507 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:06:03,354 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 257 flow [2023-08-30 10:06:03,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=257, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2023-08-30 10:06:03,354 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 11 predicate places. [2023-08-30 10:06:03,354 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 257 flow [2023-08-30 10:06:03,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:03,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:03,355 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:03,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 10:06:03,355 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:06:03,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:03,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1026096504, now seen corresponding path program 1 times [2023-08-30 10:06:03,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:03,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112884573] [2023-08-30 10:06:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:03,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:06:03,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:03,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112884573] [2023-08-30 10:06:03,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112884573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:03,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603168200] [2023-08-30 10:06:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:03,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:03,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:03,421 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:06:03,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 10:06:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:03,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 10:06:03,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:06:03,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:06:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:06:03,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603168200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:06:03,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:06:03,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 10:06:03,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202488629] [2023-08-30 10:06:03,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:06:03,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 10:06:03,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:03,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 10:06:03,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 10:06:03,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 403 [2023-08-30 10:06:03,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 257 flow. Second operand has 13 states, 13 states have (on average 183.6153846153846) internal successors, (2387), 13 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:03,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:03,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 403 [2023-08-30 10:06:03,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:04,220 INFO L130 PetriNetUnfolder]: 4408/6437 cut-off events. [2023-08-30 10:06:04,220 INFO L131 PetriNetUnfolder]: For 6880/6880 co-relation queries the response was YES. [2023-08-30 10:06:04,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14628 conditions, 6437 events. 4408/6437 cut-off events. For 6880/6880 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 34077 event pairs, 0 based on Foata normal form. 625/7061 useless extension candidates. Maximal degree in co-relation 14615. Up to 2975 conditions per place. [2023-08-30 10:06:04,234 INFO L137 encePairwiseOnDemand]: 400/403 looper letters, 0 selfloop transitions, 0 changer transitions 74/74 dead transitions. [2023-08-30 10:06:04,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 347 flow [2023-08-30 10:06:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:06:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:06:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1337 transitions. [2023-08-30 10:06:04,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4739454094292804 [2023-08-30 10:06:04,238 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1337 transitions. [2023-08-30 10:06:04,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1337 transitions. [2023-08-30 10:06:04,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:04,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1337 transitions. [2023-08-30 10:06:04,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:04,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 403.0) internal successors, (3224), 8 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:04,246 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 403.0) internal successors, (3224), 8 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:04,246 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 257 flow. Second operand 7 states and 1337 transitions. [2023-08-30 10:06:04,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 347 flow [2023-08-30 10:06:04,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 322 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-30 10:06:04,251 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2023-08-30 10:06:04,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2023-08-30 10:06:04,251 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -17 predicate places. [2023-08-30 10:06:04,251 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2023-08-30 10:06:04,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.6153846153846) internal successors, (2387), 13 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:04,252 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2023-08-30 10:06:04,253 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2023-08-30 10:06:04,253 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2023-08-30 10:06:04,253 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2023-08-30 10:06:04,253 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2023-08-30 10:06:04,253 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2023-08-30 10:06:04,253 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2023-08-30 10:06:04,254 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2023-08-30 10:06:04,254 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2023-08-30 10:06:04,254 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2023-08-30 10:06:04,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 10:06:04,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 10:06:04,459 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 10:06:04,460 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:06:04,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 219 transitions, 482 flow [2023-08-30 10:06:04,510 INFO L130 PetriNetUnfolder]: 99/813 cut-off events. [2023-08-30 10:06:04,511 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 10:06:04,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 813 events. 99/813 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3723 event pairs, 6 based on Foata normal form. 0/646 useless extension candidates. Maximal degree in co-relation 575. Up to 32 conditions per place. [2023-08-30 10:06:04,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 219 transitions, 482 flow [2023-08-30 10:06:04,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 219 transitions, 482 flow [2023-08-30 10:06:04,519 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:06:04,519 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 219 transitions, 482 flow [2023-08-30 10:06:04,519 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 219 transitions, 482 flow [2023-08-30 10:06:04,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 219 transitions, 482 flow [2023-08-30 10:06:04,574 INFO L130 PetriNetUnfolder]: 99/813 cut-off events. [2023-08-30 10:06:04,574 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 10:06:04,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 813 events. 99/813 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3723 event pairs, 6 based on Foata normal form. 0/646 useless extension candidates. Maximal degree in co-relation 575. Up to 32 conditions per place. [2023-08-30 10:06:04,593 INFO L119 LiptonReduction]: Number of co-enabled transitions 20216 [2023-08-30 10:06:07,525 INFO L134 LiptonReduction]: Checked pairs total: 33421 [2023-08-30 10:06:07,525 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-08-30 10:06:07,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:06:07,526 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;@3c14b9f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:06:07,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:06:07,537 INFO L130 PetriNetUnfolder]: 49/197 cut-off events. [2023-08-30 10:06:07,537 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 10:06:07,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:07,537 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:07,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:06:07,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:07,538 INFO L85 PathProgramCache]: Analyzing trace with hash -476385537, now seen corresponding path program 1 times [2023-08-30 10:06:07,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:07,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591645704] [2023-08-30 10:06:07,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:07,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:06:07,550 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:06:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:06:07,561 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:06:07,561 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:06:07,561 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:06:07,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 10:06:07,562 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:06:07,562 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:06:07,562 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:06:07,562 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 10:06:07,585 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 10:06:07,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 240 transitions, 540 flow [2023-08-30 10:06:07,715 INFO L130 PetriNetUnfolder]: 161/1235 cut-off events. [2023-08-30 10:06:07,715 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 10:06:07,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1346 conditions, 1235 events. 161/1235 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6346 event pairs, 23 based on Foata normal form. 0/982 useless extension candidates. Maximal degree in co-relation 858. Up to 80 conditions per place. [2023-08-30 10:06:07,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 240 transitions, 540 flow [2023-08-30 10:06:07,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 240 transitions, 540 flow [2023-08-30 10:06:07,734 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:06:07,734 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 240 transitions, 540 flow [2023-08-30 10:06:07,734 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 240 transitions, 540 flow [2023-08-30 10:06:07,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 240 transitions, 540 flow [2023-08-30 10:06:07,920 INFO L130 PetriNetUnfolder]: 161/1235 cut-off events. [2023-08-30 10:06:07,920 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 10:06:07,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1346 conditions, 1235 events. 161/1235 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6346 event pairs, 23 based on Foata normal form. 0/982 useless extension candidates. Maximal degree in co-relation 858. Up to 80 conditions per place. [2023-08-30 10:06:07,951 INFO L119 LiptonReduction]: Number of co-enabled transitions 27360 [2023-08-30 10:06:11,206 INFO L134 LiptonReduction]: Checked pairs total: 49704 [2023-08-30 10:06:11,206 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-08-30 10:06:11,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:06:11,210 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;@3c14b9f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:06:11,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 10:06:11,212 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 10:06:11,212 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:06:11,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:11,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 10:06:11,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:06:11,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:11,213 INFO L85 PathProgramCache]: Analyzing trace with hash 87341935, now seen corresponding path program 1 times [2023-08-30 10:06:11,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:11,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908204473] [2023-08-30 10:06:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:11,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:06:11,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:11,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908204473] [2023-08-30 10:06:11,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908204473] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:11,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:11,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:06:11,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261132006] [2023-08-30 10:06:11,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:11,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:06:11,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:11,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:06:11,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:06:11,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 442 [2023-08-30 10:06:11,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 87 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:11,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:11,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 442 [2023-08-30 10:06:11,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand