/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.error.function.in.sv-comp.mode false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread-deagle/floating_read-25.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-53ca081-m [2022-09-16 12:05:54,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-16 12:05:54,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-16 12:05:54,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-16 12:05:54,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-16 12:05:54,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-16 12:05:54,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-16 12:05:54,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-16 12:05:54,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-16 12:05:54,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-16 12:05:54,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-16 12:05:54,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-16 12:05:54,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-16 12:05:54,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-16 12:05:54,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-16 12:05:54,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-16 12:05:54,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-16 12:05:54,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-16 12:05:54,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-16 12:05:54,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-16 12:05:54,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-16 12:05:54,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-16 12:05:54,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-16 12:05:54,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-16 12:05:54,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-16 12:05:54,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-16 12:05:54,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-16 12:05:54,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-16 12:05:54,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-16 12:05:54,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-16 12:05:54,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-16 12:05:54,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-16 12:05:54,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-16 12:05:54,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-16 12:05:54,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-16 12:05:54,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-16 12:05:54,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-16 12:05:54,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-16 12:05:54,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-16 12:05:54,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-16 12:05:54,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-16 12:05:54,452 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-09-16 12:05:54,487 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-16 12:05:54,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-16 12:05:54,488 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-16 12:05:54,488 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-16 12:05:54,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-16 12:05:54,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-16 12:05:54,489 INFO L138 SettingsManager]: * Use SBE=true [2022-09-16 12:05:54,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-16 12:05:54,490 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-16 12:05:54,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-16 12:05:54,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-16 12:05:54,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-16 12:05:54,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-16 12:05:54,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-16 12:05:54,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-16 12:05:54,491 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-16 12:05:54,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-16 12:05:54,491 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-16 12:05:54,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-16 12:05:54,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-16 12:05:54,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-16 12:05:54,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-16 12:05:54,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-16 12:05:54,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 12:05:54,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-16 12:05:54,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-16 12:05:54,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-16 12:05:54,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-16 12:05:54,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-16 12:05:54,493 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-16 12:05:54,493 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-16 12:05:54,493 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of error function in SV-COMP mode -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2022-09-16 12:05:54,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-16 12:05:54,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-16 12:05:54,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-16 12:05:54,735 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-16 12:05:54,736 INFO L275 PluginConnector]: CDTParser initialized [2022-09-16 12:05:54,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/floating_read-25.i [2022-09-16 12:05:54,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/659226b2c/74e6f27544774ebdb4e42a8d1a728e1e/FLAG6599de1aa [2022-09-16 12:05:55,210 INFO L306 CDTParser]: Found 1 translation units. [2022-09-16 12:05:55,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/floating_read-25.i [2022-09-16 12:05:55,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/659226b2c/74e6f27544774ebdb4e42a8d1a728e1e/FLAG6599de1aa [2022-09-16 12:05:55,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/659226b2c/74e6f27544774ebdb4e42a8d1a728e1e [2022-09-16 12:05:55,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-16 12:05:55,239 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-16 12:05:55,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-16 12:05:55,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-16 12:05:55,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-16 12:05:55,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 12:05:55" (1/1) ... [2022-09-16 12:05:55,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cd95a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:05:55, skipping insertion in model container [2022-09-16 12:05:55,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 12:05:55" (1/1) ... [2022-09-16 12:05:55,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-16 12:05:55,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-16 12:05:55,533 WARN L1550 CHandler]: Possible shadowing of function thread [2022-09-16 12:05:55,549 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/floating_read-25.i[31197,31210] [2022-09-16 12:05:55,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 12:05:55,561 INFO L203 MainTranslator]: Completed pre-run [2022-09-16 12:05:55,590 WARN L1550 CHandler]: Possible shadowing of function thread [2022-09-16 12:05:55,593 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/floating_read-25.i[31197,31210] [2022-09-16 12:05:55,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 12:05:55,619 INFO L208 MainTranslator]: Completed translation [2022-09-16 12:05:55,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:05:55 WrapperNode [2022-09-16 12:05:55,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-16 12:05:55,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-16 12:05:55,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-16 12:05:55,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-16 12:05:55,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:05:55" (1/1) ... [2022-09-16 12:05:55,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:05:55" (1/1) ... [2022-09-16 12:05:55,663 INFO L138 Inliner]: procedures = 162, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2022-09-16 12:05:55,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-16 12:05:55,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-16 12:05:55,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-16 12:05:55,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-16 12:05:55,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:05:55" (1/1) ... [2022-09-16 12:05:55,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:05:55" (1/1) ... [2022-09-16 12:05:55,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:05:55" (1/1) ... [2022-09-16 12:05:55,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:05:55" (1/1) ... [2022-09-16 12:05:55,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:05:55" (1/1) ... [2022-09-16 12:05:55,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:05:55" (1/1) ... [2022-09-16 12:05:55,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:05:55" (1/1) ... [2022-09-16 12:05:55,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-16 12:05:55,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-16 12:05:55,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-16 12:05:55,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-16 12:05:55,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:05:55" (1/1) ... [2022-09-16 12:05:55,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 12:05:55,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:05:55,728 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) [2022-09-16 12:05:55,731 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 [2022-09-16 12:05:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-16 12:05:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-16 12:05:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-16 12:05:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-16 12:05:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-16 12:05:55,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-16 12:05:55,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-16 12:05:55,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-09-16 12:05:55,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-09-16 12:05:55,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-16 12:05:55,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-16 12:05:55,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-16 12:05:55,765 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-16 12:05:55,928 INFO L234 CfgBuilder]: Building ICFG [2022-09-16 12:05:55,930 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-16 12:05:56,082 INFO L275 CfgBuilder]: Performing block encoding [2022-09-16 12:05:56,087 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-16 12:05:56,087 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-09-16 12:05:56,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 12:05:56 BoogieIcfgContainer [2022-09-16 12:05:56,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-16 12:05:56,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-16 12:05:56,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-16 12:05:56,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-16 12:05:56,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 12:05:55" (1/3) ... [2022-09-16 12:05:56,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b8055b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 12:05:56, skipping insertion in model container [2022-09-16 12:05:56,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:05:55" (2/3) ... [2022-09-16 12:05:56,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b8055b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 12:05:56, skipping insertion in model container [2022-09-16 12:05:56,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 12:05:56" (3/3) ... [2022-09-16 12:05:56,103 INFO L112 eAbstractionObserver]: Analyzing ICFG floating_read-25.i [2022-09-16 12:05:56,120 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-16 12:05:56,120 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-09-16 12:05:56,120 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-16 12:05:56,191 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-09-16 12:05:56,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 140 flow [2022-09-16 12:05:56,269 INFO L130 PetriNetUnfolder]: 7/87 cut-off events. [2022-09-16 12:05:56,269 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-09-16 12:05:56,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 87 events. 7/87 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 106 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2022-09-16 12:05:56,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 140 flow [2022-09-16 12:05:56,278 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 55 transitions, 118 flow [2022-09-16 12:05:56,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 12:05:56,298 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=false, 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;@5ea4da82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 12:05:56,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-09-16 12:05:56,313 INFO L130 PetriNetUnfolder]: 2/42 cut-off events. [2022-09-16 12:05:56,313 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 12:05:56,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:56,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:56,315 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:56,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:56,320 INFO L85 PathProgramCache]: Analyzing trace with hash 90008394, now seen corresponding path program 1 times [2022-09-16 12:05:56,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:56,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512687352] [2022-09-16 12:05:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:56,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:56,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:05:56,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512687352] [2022-09-16 12:05:56,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512687352] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:05:56,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:05:56,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:05:56,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749099630] [2022-09-16 12:05:56,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:05:56,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:05:56,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:05:56,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:05:56,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:05:56,575 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 66 [2022-09-16 12:05:56,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:56,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:05:56,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 66 [2022-09-16 12:05:56,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:05:56,646 INFO L130 PetriNetUnfolder]: 0/54 cut-off events. [2022-09-16 12:05:56,646 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-16 12:05:56,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 54 events. 0/54 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 1/52 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-09-16 12:05:56,648 INFO L137 encePairwiseOnDemand]: 57/66 looper letters, 10 selfloop transitions, 4 changer transitions 1/52 dead transitions. [2022-09-16 12:05:56,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 140 flow [2022-09-16 12:05:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:05:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:05:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 260 transitions. [2022-09-16 12:05:56,661 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2022-09-16 12:05:56,662 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 260 transitions. [2022-09-16 12:05:56,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 260 transitions. [2022-09-16 12:05:56,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:05:56,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 260 transitions. [2022-09-16 12:05:56,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 52.0) internal successors, (260), 5 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:56,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:56,675 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:56,676 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 118 flow. Second operand 5 states and 260 transitions. [2022-09-16 12:05:56,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 140 flow [2022-09-16 12:05:56,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-16 12:05:56,684 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 118 flow [2022-09-16 12:05:56,686 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2022-09-16 12:05:56,689 INFO L287 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2022-09-16 12:05:56,689 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 118 flow [2022-09-16 12:05:56,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:56,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:56,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:56,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-16 12:05:56,690 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:56,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:56,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1159646497, now seen corresponding path program 1 times [2022-09-16 12:05:56,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:56,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806658779] [2022-09-16 12:05:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:56,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:05:56,729 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-16 12:05:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:05:56,776 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-16 12:05:56,776 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-16 12:05:56,778 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-09-16 12:05:56,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2022-09-16 12:05:56,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2022-09-16 12:05:56,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 5 remaining) [2022-09-16 12:05:56,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 5 remaining) [2022-09-16 12:05:56,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-16 12:05:56,781 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-09-16 12:05:56,784 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-16 12:05:56,784 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-09-16 12:05:56,810 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-16 12:05:56,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 73 transitions, 164 flow [2022-09-16 12:05:56,838 INFO L130 PetriNetUnfolder]: 13/152 cut-off events. [2022-09-16 12:05:56,838 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-09-16 12:05:56,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 152 events. 13/152 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 264 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 89. Up to 8 conditions per place. [2022-09-16 12:05:56,839 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 73 transitions, 164 flow [2022-09-16 12:05:56,840 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 65 transitions, 148 flow [2022-09-16 12:05:56,841 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 12:05:56,842 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=false, 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;@5ea4da82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 12:05:56,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-09-16 12:05:56,849 INFO L130 PetriNetUnfolder]: 2/41 cut-off events. [2022-09-16 12:05:56,849 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 12:05:56,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:56,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:56,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:56,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:56,851 INFO L85 PathProgramCache]: Analyzing trace with hash -307334824, now seen corresponding path program 1 times [2022-09-16 12:05:56,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:56,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004177774] [2022-09-16 12:05:56,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:56,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:56,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:05:56,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004177774] [2022-09-16 12:05:56,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004177774] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:05:56,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:05:56,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:05:56,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053802734] [2022-09-16 12:05:56,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:05:56,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:05:56,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:05:56,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:05:56,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:05:56,908 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 73 [2022-09-16 12:05:56,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:56,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:05:56,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 73 [2022-09-16 12:05:56,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:05:56,988 INFO L130 PetriNetUnfolder]: 2/105 cut-off events. [2022-09-16 12:05:56,988 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-09-16 12:05:56,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 105 events. 2/105 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 139 event pairs, 0 based on Foata normal form. 2/95 useless extension candidates. Maximal degree in co-relation 78. Up to 21 conditions per place. [2022-09-16 12:05:56,990 INFO L137 encePairwiseOnDemand]: 64/73 looper letters, 19 selfloop transitions, 4 changer transitions 1/69 dead transitions. [2022-09-16 12:05:56,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 202 flow [2022-09-16 12:05:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:05:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:05:56,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 294 transitions. [2022-09-16 12:05:56,993 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8054794520547945 [2022-09-16 12:05:56,994 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 294 transitions. [2022-09-16 12:05:56,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 294 transitions. [2022-09-16 12:05:56,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:05:56,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 294 transitions. [2022-09-16 12:05:56,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:56,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:56,997 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:56,997 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 148 flow. Second operand 5 states and 294 transitions. [2022-09-16 12:05:56,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 202 flow [2022-09-16 12:05:56,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-16 12:05:57,000 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 172 flow [2022-09-16 12:05:57,001 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2022-09-16 12:05:57,002 INFO L287 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2022-09-16 12:05:57,002 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 172 flow [2022-09-16 12:05:57,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:57,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:57,003 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:57,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-16 12:05:57,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:57,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:57,004 INFO L85 PathProgramCache]: Analyzing trace with hash 284383053, now seen corresponding path program 1 times [2022-09-16 12:05:57,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:57,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055267941] [2022-09-16 12:05:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:57,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 12:05:57,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:05:57,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055267941] [2022-09-16 12:05:57,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055267941] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:05:57,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:05:57,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:05:57,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2752511] [2022-09-16 12:05:57,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:05:57,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:05:57,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:05:57,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:05:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:05:57,090 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 73 [2022-09-16 12:05:57,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:57,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:05:57,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 73 [2022-09-16 12:05:57,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:05:57,169 INFO L130 PetriNetUnfolder]: 2/102 cut-off events. [2022-09-16 12:05:57,169 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-09-16 12:05:57,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 102 events. 2/102 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 128 event pairs, 0 based on Foata normal form. 1/97 useless extension candidates. Maximal degree in co-relation 102. Up to 10 conditions per place. [2022-09-16 12:05:57,170 INFO L137 encePairwiseOnDemand]: 67/73 looper letters, 11 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2022-09-16 12:05:57,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 64 transitions, 208 flow [2022-09-16 12:05:57,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:05:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:05:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 282 transitions. [2022-09-16 12:05:57,172 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7726027397260274 [2022-09-16 12:05:57,172 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 282 transitions. [2022-09-16 12:05:57,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 282 transitions. [2022-09-16 12:05:57,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:05:57,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 282 transitions. [2022-09-16 12:05:57,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 56.4) internal successors, (282), 5 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:57,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:57,175 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:57,175 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 172 flow. Second operand 5 states and 282 transitions. [2022-09-16 12:05:57,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 64 transitions, 208 flow [2022-09-16 12:05:57,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 64 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:05:57,178 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 190 flow [2022-09-16 12:05:57,178 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=74, PETRI_TRANSITIONS=64} [2022-09-16 12:05:57,180 INFO L287 CegarLoopForPetriNet]: 66 programPoint places, 8 predicate places. [2022-09-16 12:05:57,180 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 190 flow [2022-09-16 12:05:57,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:57,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:57,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:57,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-16 12:05:57,182 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:57,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:57,182 INFO L85 PathProgramCache]: Analyzing trace with hash 225940277, now seen corresponding path program 1 times [2022-09-16 12:05:57,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:57,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372404934] [2022-09-16 12:05:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:57,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:57,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:05:57,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372404934] [2022-09-16 12:05:57,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372404934] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:05:57,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361277721] [2022-09-16 12:05:57,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:57,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:05:57,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:05:57,272 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) [2022-09-16 12:05:57,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-16 12:05:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:57,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 12:05:57,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:05:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:57,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 12:05:57,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361277721] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:05:57,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 12:05:57,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 12:05:57,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546517145] [2022-09-16 12:05:57,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:05:57,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 12:05:57,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:05:57,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 12:05:57,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 12:05:57,460 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 73 [2022-09-16 12:05:57,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 190 flow. Second operand has 6 states, 6 states have (on average 55.666666666666664) internal successors, (334), 6 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:57,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:05:57,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 73 [2022-09-16 12:05:57,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:05:57,512 INFO L130 PetriNetUnfolder]: 2/101 cut-off events. [2022-09-16 12:05:57,512 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-09-16 12:05:57,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 101 events. 2/101 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 117 event pairs, 0 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 92. Up to 13 conditions per place. [2022-09-16 12:05:57,513 INFO L137 encePairwiseOnDemand]: 68/73 looper letters, 15 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2022-09-16 12:05:57,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 66 transitions, 234 flow [2022-09-16 12:05:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 12:05:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 12:05:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 393 transitions. [2022-09-16 12:05:57,514 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7690802348336595 [2022-09-16 12:05:57,514 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 393 transitions. [2022-09-16 12:05:57,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 393 transitions. [2022-09-16 12:05:57,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:05:57,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 393 transitions. [2022-09-16 12:05:57,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 56.142857142857146) internal successors, (393), 7 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:57,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 73.0) internal successors, (584), 8 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:57,517 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 73.0) internal successors, (584), 8 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:57,517 INFO L175 Difference]: Start difference. First operand has 74 places, 64 transitions, 190 flow. Second operand 7 states and 393 transitions. [2022-09-16 12:05:57,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 66 transitions, 234 flow [2022-09-16 12:05:57,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 222 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:05:57,519 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 186 flow [2022-09-16 12:05:57,519 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2022-09-16 12:05:57,519 INFO L287 CegarLoopForPetriNet]: 66 programPoint places, 10 predicate places. [2022-09-16 12:05:57,520 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 186 flow [2022-09-16 12:05:57,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 55.666666666666664) internal successors, (334), 6 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:57,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:57,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:57,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-16 12:05:57,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:05:57,733 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:57,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1429842396, now seen corresponding path program 1 times [2022-09-16 12:05:57,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:57,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116790166] [2022-09-16 12:05:57,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:57,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:57,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:05:57,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116790166] [2022-09-16 12:05:57,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116790166] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:05:57,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924442296] [2022-09-16 12:05:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:57,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:05:57,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:05:57,794 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) [2022-09-16 12:05:57,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-16 12:05:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:57,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:05:57,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:05:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:57,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:05:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:57,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924442296] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:05:57,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:05:57,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-16 12:05:57,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553242845] [2022-09-16 12:05:57,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:05:57,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 12:05:57,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:05:57,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 12:05:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-16 12:05:57,961 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 73 [2022-09-16 12:05:57,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 186 flow. Second operand has 10 states, 10 states have (on average 56.0) internal successors, (560), 10 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:57,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:05:57,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 73 [2022-09-16 12:05:57,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:05:58,025 INFO L130 PetriNetUnfolder]: 0/59 cut-off events. [2022-09-16 12:05:58,025 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-09-16 12:05:58,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 59 events. 0/59 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-09-16 12:05:58,025 INFO L137 encePairwiseOnDemand]: 68/73 looper letters, 13 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2022-09-16 12:05:58,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 53 transitions, 200 flow [2022-09-16 12:05:58,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-16 12:05:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-16 12:05:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 499 transitions. [2022-09-16 12:05:58,027 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7595129375951294 [2022-09-16 12:05:58,027 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 499 transitions. [2022-09-16 12:05:58,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 499 transitions. [2022-09-16 12:05:58,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:05:58,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 499 transitions. [2022-09-16 12:05:58,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 55.44444444444444) internal successors, (499), 9 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,030 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,030 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 186 flow. Second operand 9 states and 499 transitions. [2022-09-16 12:05:58,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 53 transitions, 200 flow [2022-09-16 12:05:58,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 53 transitions, 183 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-09-16 12:05:58,032 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 145 flow [2022-09-16 12:05:58,033 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=145, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2022-09-16 12:05:58,035 INFO L287 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2022-09-16 12:05:58,035 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 145 flow [2022-09-16 12:05:58,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.0) internal successors, (560), 10 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:58,036 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:58,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-16 12:05:58,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-09-16 12:05:58,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:58,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:58,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1781391463, now seen corresponding path program 1 times [2022-09-16 12:05:58,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:58,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259031510] [2022-09-16 12:05:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:58,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:05:58,269 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-16 12:05:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:05:58,293 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-16 12:05:58,294 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-16 12:05:58,294 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-09-16 12:05:58,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2022-09-16 12:05:58,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2022-09-16 12:05:58,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 5 remaining) [2022-09-16 12:05:58,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 5 remaining) [2022-09-16 12:05:58,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-09-16 12:05:58,294 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-09-16 12:05:58,295 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-16 12:05:58,295 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-09-16 12:05:58,305 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-09-16 12:05:58,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 190 flow [2022-09-16 12:05:58,325 INFO L130 PetriNetUnfolder]: 24/258 cut-off events. [2022-09-16 12:05:58,325 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-09-16 12:05:58,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 258 events. 24/258 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 614 event pairs, 1 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 160. Up to 16 conditions per place. [2022-09-16 12:05:58,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 80 transitions, 190 flow [2022-09-16 12:05:58,326 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 72 transitions, 174 flow [2022-09-16 12:05:58,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 12:05:58,333 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=false, 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;@5ea4da82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 12:05:58,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-09-16 12:05:58,337 INFO L130 PetriNetUnfolder]: 2/41 cut-off events. [2022-09-16 12:05:58,337 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 12:05:58,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:58,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:58,337 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:58,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:58,337 INFO L85 PathProgramCache]: Analyzing trace with hash -272540883, now seen corresponding path program 1 times [2022-09-16 12:05:58,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:58,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508880956] [2022-09-16 12:05:58,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:58,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:58,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:05:58,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508880956] [2022-09-16 12:05:58,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508880956] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:05:58,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:05:58,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:05:58,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234143613] [2022-09-16 12:05:58,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:05:58,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:05:58,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:05:58,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:05:58,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:05:58,375 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 80 [2022-09-16 12:05:58,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:05:58,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 80 [2022-09-16 12:05:58,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:05:58,418 INFO L130 PetriNetUnfolder]: 7/176 cut-off events. [2022-09-16 12:05:58,418 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-09-16 12:05:58,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 176 events. 7/176 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 363 event pairs, 1 based on Foata normal form. 3/155 useless extension candidates. Maximal degree in co-relation 146. Up to 40 conditions per place. [2022-09-16 12:05:58,419 INFO L137 encePairwiseOnDemand]: 71/80 looper letters, 21 selfloop transitions, 4 changer transitions 1/76 dead transitions. [2022-09-16 12:05:58,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 232 flow [2022-09-16 12:05:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:05:58,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:05:58,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 321 transitions. [2022-09-16 12:05:58,421 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8025 [2022-09-16 12:05:58,421 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 321 transitions. [2022-09-16 12:05:58,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 321 transitions. [2022-09-16 12:05:58,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:05:58,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 321 transitions. [2022-09-16 12:05:58,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 64.2) internal successors, (321), 5 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,423 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,423 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 174 flow. Second operand 5 states and 321 transitions. [2022-09-16 12:05:58,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 232 flow [2022-09-16 12:05:58,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 232 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-16 12:05:58,424 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 198 flow [2022-09-16 12:05:58,425 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2022-09-16 12:05:58,425 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2022-09-16 12:05:58,425 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 198 flow [2022-09-16 12:05:58,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:58,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:58,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-09-16 12:05:58,426 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:58,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:58,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1659788071, now seen corresponding path program 1 times [2022-09-16 12:05:58,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:58,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867456739] [2022-09-16 12:05:58,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:58,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 12:05:58,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:05:58,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867456739] [2022-09-16 12:05:58,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867456739] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:05:58,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:05:58,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:05:58,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986258071] [2022-09-16 12:05:58,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:05:58,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:05:58,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:05:58,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:05:58,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:05:58,487 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 80 [2022-09-16 12:05:58,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:05:58,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 80 [2022-09-16 12:05:58,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:05:58,534 INFO L130 PetriNetUnfolder]: 7/171 cut-off events. [2022-09-16 12:05:58,534 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-09-16 12:05:58,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 171 events. 7/171 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 332 event pairs, 1 based on Foata normal form. 2/159 useless extension candidates. Maximal degree in co-relation 207. Up to 20 conditions per place. [2022-09-16 12:05:58,535 INFO L137 encePairwiseOnDemand]: 74/80 looper letters, 13 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2022-09-16 12:05:58,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 238 flow [2022-09-16 12:05:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:05:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:05:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 309 transitions. [2022-09-16 12:05:58,536 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7725 [2022-09-16 12:05:58,536 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 309 transitions. [2022-09-16 12:05:58,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 309 transitions. [2022-09-16 12:05:58,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:05:58,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 309 transitions. [2022-09-16 12:05:58,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,538 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,538 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 198 flow. Second operand 5 states and 309 transitions. [2022-09-16 12:05:58,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 238 flow [2022-09-16 12:05:58,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 71 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:05:58,540 INFO L231 Difference]: Finished difference. Result has 82 places, 71 transitions, 216 flow [2022-09-16 12:05:58,540 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=82, PETRI_TRANSITIONS=71} [2022-09-16 12:05:58,540 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 8 predicate places. [2022-09-16 12:05:58,540 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 71 transitions, 216 flow [2022-09-16 12:05:58,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:58,541 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:58,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-09-16 12:05:58,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:58,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:58,541 INFO L85 PathProgramCache]: Analyzing trace with hash -86177045, now seen corresponding path program 1 times [2022-09-16 12:05:58,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:58,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454069097] [2022-09-16 12:05:58,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:58,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:58,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:05:58,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454069097] [2022-09-16 12:05:58,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454069097] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:05:58,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010767548] [2022-09-16 12:05:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:58,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:05:58,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:05:58,616 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) [2022-09-16 12:05:58,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-16 12:05:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:58,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 12:05:58,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:05:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:58,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 12:05:58,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010767548] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:05:58,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 12:05:58,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 12:05:58,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435008983] [2022-09-16 12:05:58,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:05:58,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 12:05:58,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:05:58,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 12:05:58,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 12:05:58,718 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 80 [2022-09-16 12:05:58,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 71 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 60.666666666666664) internal successors, (364), 6 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:05:58,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 80 [2022-09-16 12:05:58,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:05:58,785 INFO L130 PetriNetUnfolder]: 7/169 cut-off events. [2022-09-16 12:05:58,785 INFO L131 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2022-09-16 12:05:58,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 169 events. 7/169 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 321 event pairs, 1 based on Foata normal form. 2/157 useless extension candidates. Maximal degree in co-relation 164. Up to 26 conditions per place. [2022-09-16 12:05:58,786 INFO L137 encePairwiseOnDemand]: 75/80 looper letters, 17 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2022-09-16 12:05:58,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 73 transitions, 264 flow [2022-09-16 12:05:58,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 12:05:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 12:05:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 430 transitions. [2022-09-16 12:05:58,787 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7678571428571429 [2022-09-16 12:05:58,787 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 430 transitions. [2022-09-16 12:05:58,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 430 transitions. [2022-09-16 12:05:58,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:05:58,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 430 transitions. [2022-09-16 12:05:58,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 61.42857142857143) internal successors, (430), 7 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 80.0) internal successors, (640), 8 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,790 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 80.0) internal successors, (640), 8 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,790 INFO L175 Difference]: Start difference. First operand has 82 places, 71 transitions, 216 flow. Second operand 7 states and 430 transitions. [2022-09-16 12:05:58,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 73 transitions, 264 flow [2022-09-16 12:05:58,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 73 transitions, 252 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:05:58,793 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 212 flow [2022-09-16 12:05:58,793 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2022-09-16 12:05:58,794 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2022-09-16 12:05:58,794 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 212 flow [2022-09-16 12:05:58,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.666666666666664) internal successors, (364), 6 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:58,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:58,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:58,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-16 12:05:59,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:05:59,019 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:59,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:59,019 INFO L85 PathProgramCache]: Analyzing trace with hash -706922565, now seen corresponding path program 1 times [2022-09-16 12:05:59,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:59,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708938468] [2022-09-16 12:05:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:59,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:59,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:05:59,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708938468] [2022-09-16 12:05:59,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708938468] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:05:59,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100837831] [2022-09-16 12:05:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:59,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:05:59,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:05:59,052 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) [2022-09-16 12:05:59,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-16 12:05:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:59,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:05:59,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:05:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:59,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:05:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:59,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100837831] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:05:59,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:05:59,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-16 12:05:59,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510530565] [2022-09-16 12:05:59,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:05:59,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 12:05:59,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:05:59,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 12:05:59,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-16 12:05:59,161 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 80 [2022-09-16 12:05:59,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 70 transitions, 212 flow. Second operand has 10 states, 10 states have (on average 61.0) internal successors, (610), 10 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:05:59,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 80 [2022-09-16 12:05:59,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:05:59,243 INFO L130 PetriNetUnfolder]: 5/163 cut-off events. [2022-09-16 12:05:59,243 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2022-09-16 12:05:59,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 163 events. 5/163 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 231 event pairs, 5 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 152. Up to 17 conditions per place. [2022-09-16 12:05:59,244 INFO L137 encePairwiseOnDemand]: 74/80 looper letters, 22 selfloop transitions, 9 changer transitions 0/81 dead transitions. [2022-09-16 12:05:59,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 81 transitions, 312 flow [2022-09-16 12:05:59,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-16 12:05:59,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-16 12:05:59,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 555 transitions. [2022-09-16 12:05:59,248 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7708333333333334 [2022-09-16 12:05:59,248 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 555 transitions. [2022-09-16 12:05:59,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 555 transitions. [2022-09-16 12:05:59,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:05:59,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 555 transitions. [2022-09-16 12:05:59,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.666666666666664) internal successors, (555), 9 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,256 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,256 INFO L175 Difference]: Start difference. First operand has 84 places, 70 transitions, 212 flow. Second operand 9 states and 555 transitions. [2022-09-16 12:05:59,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 81 transitions, 312 flow [2022-09-16 12:05:59,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 81 transitions, 299 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-09-16 12:05:59,259 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 259 flow [2022-09-16 12:05:59,259 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=259, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2022-09-16 12:05:59,260 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2022-09-16 12:05:59,260 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 259 flow [2022-09-16 12:05:59,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 61.0) internal successors, (610), 10 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:59,260 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:59,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-16 12:05:59,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:05:59,476 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:59,476 INFO L85 PathProgramCache]: Analyzing trace with hash -373827647, now seen corresponding path program 1 times [2022-09-16 12:05:59,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:59,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196576048] [2022-09-16 12:05:59,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:59,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:05:59,498 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-16 12:05:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:05:59,529 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-16 12:05:59,529 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-16 12:05:59,529 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-09-16 12:05:59,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2022-09-16 12:05:59,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2022-09-16 12:05:59,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 5 remaining) [2022-09-16 12:05:59,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 5 remaining) [2022-09-16 12:05:59,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-09-16 12:05:59,530 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-09-16 12:05:59,530 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-16 12:05:59,531 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-09-16 12:05:59,538 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-09-16 12:05:59,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 87 transitions, 218 flow [2022-09-16 12:05:59,564 INFO L130 PetriNetUnfolder]: 47/448 cut-off events. [2022-09-16 12:05:59,564 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-09-16 12:05:59,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 448 events. 47/448 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1460 event pairs, 6 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 278. Up to 32 conditions per place. [2022-09-16 12:05:59,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 87 transitions, 218 flow [2022-09-16 12:05:59,569 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 79 transitions, 202 flow [2022-09-16 12:05:59,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 12:05:59,570 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=false, 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;@5ea4da82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 12:05:59,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-09-16 12:05:59,573 INFO L130 PetriNetUnfolder]: 2/40 cut-off events. [2022-09-16 12:05:59,573 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 12:05:59,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:59,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:59,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:59,573 INFO L85 PathProgramCache]: Analyzing trace with hash 194390217, now seen corresponding path program 1 times [2022-09-16 12:05:59,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:59,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414685982] [2022-09-16 12:05:59,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:59,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:59,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:05:59,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414685982] [2022-09-16 12:05:59,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414685982] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:05:59,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:05:59,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:05:59,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506060179] [2022-09-16 12:05:59,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:05:59,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:05:59,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:05:59,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:05:59,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:05:59,602 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-09-16 12:05:59,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:05:59,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-09-16 12:05:59,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:05:59,664 INFO L130 PetriNetUnfolder]: 20/299 cut-off events. [2022-09-16 12:05:59,664 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-09-16 12:05:59,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 299 events. 20/299 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 855 event pairs, 6 based on Foata normal form. 4/259 useless extension candidates. Maximal degree in co-relation 250. Up to 71 conditions per place. [2022-09-16 12:05:59,666 INFO L137 encePairwiseOnDemand]: 78/87 looper letters, 23 selfloop transitions, 4 changer transitions 1/83 dead transitions. [2022-09-16 12:05:59,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 264 flow [2022-09-16 12:05:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:05:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:05:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 348 transitions. [2022-09-16 12:05:59,667 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8 [2022-09-16 12:05:59,667 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 348 transitions. [2022-09-16 12:05:59,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 348 transitions. [2022-09-16 12:05:59,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:05:59,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 348 transitions. [2022-09-16 12:05:59,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.6) internal successors, (348), 5 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,670 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,670 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 202 flow. Second operand 5 states and 348 transitions. [2022-09-16 12:05:59,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 264 flow [2022-09-16 12:05:59,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-16 12:05:59,672 INFO L231 Difference]: Finished difference. Result has 88 places, 78 transitions, 226 flow [2022-09-16 12:05:59,672 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=88, PETRI_TRANSITIONS=78} [2022-09-16 12:05:59,672 INFO L287 CegarLoopForPetriNet]: 82 programPoint places, 6 predicate places. [2022-09-16 12:05:59,672 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 78 transitions, 226 flow [2022-09-16 12:05:59,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:59,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:59,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-09-16 12:05:59,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:59,673 INFO L85 PathProgramCache]: Analyzing trace with hash 630328712, now seen corresponding path program 1 times [2022-09-16 12:05:59,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:59,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963849702] [2022-09-16 12:05:59,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:59,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 12:05:59,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:05:59,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963849702] [2022-09-16 12:05:59,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963849702] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:05:59,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:05:59,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:05:59,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796731815] [2022-09-16 12:05:59,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:05:59,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:05:59,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:05:59,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:05:59,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:05:59,700 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-09-16 12:05:59,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 78 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:05:59,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-09-16 12:05:59,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:05:59,768 INFO L130 PetriNetUnfolder]: 20/292 cut-off events. [2022-09-16 12:05:59,768 INFO L131 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-09-16 12:05:59,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 292 events. 20/292 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 786 event pairs, 6 based on Foata normal form. 3/265 useless extension candidates. Maximal degree in co-relation 389. Up to 42 conditions per place. [2022-09-16 12:05:59,770 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 8 changer transitions 0/78 dead transitions. [2022-09-16 12:05:59,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 78 transitions, 270 flow [2022-09-16 12:05:59,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:05:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:05:59,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 336 transitions. [2022-09-16 12:05:59,771 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7724137931034483 [2022-09-16 12:05:59,771 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 336 transitions. [2022-09-16 12:05:59,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 336 transitions. [2022-09-16 12:05:59,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:05:59,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 336 transitions. [2022-09-16 12:05:59,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.2) internal successors, (336), 5 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,772 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,772 INFO L175 Difference]: Start difference. First operand has 88 places, 78 transitions, 226 flow. Second operand 5 states and 336 transitions. [2022-09-16 12:05:59,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 78 transitions, 270 flow [2022-09-16 12:05:59,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 78 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:05:59,774 INFO L231 Difference]: Finished difference. Result has 90 places, 78 transitions, 244 flow [2022-09-16 12:05:59,774 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=90, PETRI_TRANSITIONS=78} [2022-09-16 12:05:59,774 INFO L287 CegarLoopForPetriNet]: 82 programPoint places, 8 predicate places. [2022-09-16 12:05:59,774 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 78 transitions, 244 flow [2022-09-16 12:05:59,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:59,775 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:05:59,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-09-16 12:05:59,775 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:05:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:05:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1934646015, now seen corresponding path program 1 times [2022-09-16 12:05:59,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:05:59,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905112251] [2022-09-16 12:05:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:59,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:05:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:59,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:05:59,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905112251] [2022-09-16 12:05:59,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905112251] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:05:59,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288835019] [2022-09-16 12:05:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:05:59,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:05:59,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:05:59,806 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) [2022-09-16 12:05:59,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-16 12:05:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:05:59,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 12:05:59,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:05:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:05:59,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 12:05:59,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288835019] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:05:59,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 12:05:59,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 12:05:59,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466659707] [2022-09-16 12:05:59,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:05:59,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 12:05:59,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:05:59,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 12:05:59,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 12:05:59,908 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-09-16 12:05:59,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 78 transitions, 244 flow. Second operand has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:05:59,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-09-16 12:05:59,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:05:59,982 INFO L130 PetriNetUnfolder]: 20/289 cut-off events. [2022-09-16 12:05:59,982 INFO L131 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2022-09-16 12:05:59,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 289 events. 20/289 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 803 event pairs, 6 based on Foata normal form. 3/262 useless extension candidates. Maximal degree in co-relation 272. Up to 51 conditions per place. [2022-09-16 12:05:59,983 INFO L137 encePairwiseOnDemand]: 82/87 looper letters, 19 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2022-09-16 12:05:59,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 80 transitions, 296 flow [2022-09-16 12:05:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 12:05:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 12:05:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 467 transitions. [2022-09-16 12:05:59,985 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7668308702791461 [2022-09-16 12:05:59,985 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 467 transitions. [2022-09-16 12:05:59,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 467 transitions. [2022-09-16 12:05:59,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:05:59,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 467 transitions. [2022-09-16 12:05:59,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.71428571428571) internal successors, (467), 7 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,988 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,988 INFO L175 Difference]: Start difference. First operand has 90 places, 78 transitions, 244 flow. Second operand 7 states and 467 transitions. [2022-09-16 12:05:59,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 80 transitions, 296 flow [2022-09-16 12:05:59,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 80 transitions, 284 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:05:59,990 INFO L231 Difference]: Finished difference. Result has 92 places, 77 transitions, 240 flow [2022-09-16 12:05:59,990 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=92, PETRI_TRANSITIONS=77} [2022-09-16 12:05:59,991 INFO L287 CegarLoopForPetriNet]: 82 programPoint places, 10 predicate places. [2022-09-16 12:05:59,991 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 77 transitions, 240 flow [2022-09-16 12:05:59,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:05:59,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:05:59,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:00,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-16 12:06:00,203 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,SelfDestructingSolverStorable14 [2022-09-16 12:06:00,204 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:00,204 INFO L85 PathProgramCache]: Analyzing trace with hash -423930645, now seen corresponding path program 1 times [2022-09-16 12:06:00,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:00,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805339369] [2022-09-16 12:06:00,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:00,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:00,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:00,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805339369] [2022-09-16 12:06:00,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805339369] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:00,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731819827] [2022-09-16 12:06:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:00,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:00,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:00,232 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) [2022-09-16 12:06:00,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-16 12:06:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:00,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:06:00,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:00,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:06:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:00,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731819827] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:06:00,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:06:00,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-16 12:06:00,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436880440] [2022-09-16 12:06:00,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:06:00,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 12:06:00,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:00,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 12:06:00,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-16 12:06:00,352 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-09-16 12:06:00,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 77 transitions, 240 flow. Second operand has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:00,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:00,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-09-16 12:06:00,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:00,427 INFO L130 PetriNetUnfolder]: 18/283 cut-off events. [2022-09-16 12:06:00,427 INFO L131 PetriNetUnfolder]: For 145/145 co-relation queries the response was YES. [2022-09-16 12:06:00,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 283 events. 18/283 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 833 event pairs, 10 based on Foata normal form. 2/255 useless extension candidates. Maximal degree in co-relation 259. Up to 40 conditions per place. [2022-09-16 12:06:00,428 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 24 selfloop transitions, 9 changer transitions 0/88 dead transitions. [2022-09-16 12:06:00,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 88 transitions, 344 flow [2022-09-16 12:06:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-16 12:06:00,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-16 12:06:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 602 transitions. [2022-09-16 12:06:00,429 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.768837803320562 [2022-09-16 12:06:00,429 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 602 transitions. [2022-09-16 12:06:00,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 602 transitions. [2022-09-16 12:06:00,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:00,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 602 transitions. [2022-09-16 12:06:00,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 66.88888888888889) internal successors, (602), 9 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:00,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:00,432 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:00,432 INFO L175 Difference]: Start difference. First operand has 92 places, 77 transitions, 240 flow. Second operand 9 states and 602 transitions. [2022-09-16 12:06:00,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 88 transitions, 344 flow [2022-09-16 12:06:00,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 88 transitions, 331 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-09-16 12:06:00,434 INFO L231 Difference]: Finished difference. Result has 99 places, 81 transitions, 287 flow [2022-09-16 12:06:00,434 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=287, PETRI_PLACES=99, PETRI_TRANSITIONS=81} [2022-09-16 12:06:00,435 INFO L287 CegarLoopForPetriNet]: 82 programPoint places, 17 predicate places. [2022-09-16 12:06:00,435 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 81 transitions, 287 flow [2022-09-16 12:06:00,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:00,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:00,436 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:00,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-09-16 12:06:00,662 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,SelfDestructingSolverStorable15 [2022-09-16 12:06:00,662 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:00,665 INFO L85 PathProgramCache]: Analyzing trace with hash -730593204, now seen corresponding path program 1 times [2022-09-16 12:06:00,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:00,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341383021] [2022-09-16 12:06:00,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:00,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-09-16 12:06:00,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:00,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341383021] [2022-09-16 12:06:00,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341383021] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:00,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:00,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:00,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441325589] [2022-09-16 12:06:00,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:00,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:00,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:00,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:00,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:00,714 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-09-16 12:06:00,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 81 transitions, 287 flow. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:00,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:00,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-09-16 12:06:00,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:00,778 INFO L130 PetriNetUnfolder]: 20/298 cut-off events. [2022-09-16 12:06:00,778 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2022-09-16 12:06:00,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 298 events. 20/298 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 953 event pairs, 2 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 336. Up to 148 conditions per place. [2022-09-16 12:06:00,780 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 26 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2022-09-16 12:06:00,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 92 transitions, 381 flow [2022-09-16 12:06:00,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:00,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 347 transitions. [2022-09-16 12:06:00,781 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7977011494252874 [2022-09-16 12:06:00,781 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 347 transitions. [2022-09-16 12:06:00,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 347 transitions. [2022-09-16 12:06:00,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:00,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 347 transitions. [2022-09-16 12:06:00,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.4) internal successors, (347), 5 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:00,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:00,783 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:00,783 INFO L175 Difference]: Start difference. First operand has 99 places, 81 transitions, 287 flow. Second operand 5 states and 347 transitions. [2022-09-16 12:06:00,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 92 transitions, 381 flow [2022-09-16 12:06:00,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 92 transitions, 367 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-09-16 12:06:00,786 INFO L231 Difference]: Finished difference. Result has 102 places, 84 transitions, 303 flow [2022-09-16 12:06:00,786 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=102, PETRI_TRANSITIONS=84} [2022-09-16 12:06:00,787 INFO L287 CegarLoopForPetriNet]: 82 programPoint places, 20 predicate places. [2022-09-16 12:06:00,787 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 84 transitions, 303 flow [2022-09-16 12:06:00,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:00,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:00,787 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:00,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-09-16 12:06:00,787 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:00,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:00,788 INFO L85 PathProgramCache]: Analyzing trace with hash 98746669, now seen corresponding path program 1 times [2022-09-16 12:06:00,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:00,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812926802] [2022-09-16 12:06:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:00,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:06:00,801 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-16 12:06:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:06:00,829 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-16 12:06:00,829 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-16 12:06:00,829 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-09-16 12:06:00,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2022-09-16 12:06:00,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2022-09-16 12:06:00,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 5 remaining) [2022-09-16 12:06:00,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 5 remaining) [2022-09-16 12:06:00,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-09-16 12:06:00,830 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-09-16 12:06:00,831 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-16 12:06:00,831 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-09-16 12:06:00,842 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-09-16 12:06:00,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 94 transitions, 248 flow [2022-09-16 12:06:00,901 INFO L130 PetriNetUnfolder]: 98/810 cut-off events. [2022-09-16 12:06:00,902 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-09-16 12:06:00,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 810 events. 98/810 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3581 event pairs, 23 based on Foata normal form. 0/656 useless extension candidates. Maximal degree in co-relation 493. Up to 80 conditions per place. [2022-09-16 12:06:00,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 94 transitions, 248 flow [2022-09-16 12:06:00,905 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 86 transitions, 232 flow [2022-09-16 12:06:00,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 12:06:00,906 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=false, 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;@5ea4da82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 12:06:00,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-09-16 12:06:00,909 INFO L130 PetriNetUnfolder]: 2/40 cut-off events. [2022-09-16 12:06:00,909 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 12:06:00,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:00,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:00,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:00,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1093458476, now seen corresponding path program 1 times [2022-09-16 12:06:00,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:00,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695054807] [2022-09-16 12:06:00,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:00,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:00,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:00,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695054807] [2022-09-16 12:06:00,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695054807] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:00,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:00,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:00,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652458619] [2022-09-16 12:06:00,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:00,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:00,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:00,933 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 94 [2022-09-16 12:06:00,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:00,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:00,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 94 [2022-09-16 12:06:00,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:00,999 INFO L130 PetriNetUnfolder]: 53/530 cut-off events. [2022-09-16 12:06:01,000 INFO L131 PetriNetUnfolder]: For 270/270 co-relation queries the response was YES. [2022-09-16 12:06:01,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 530 events. 53/530 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2057 event pairs, 23 based on Foata normal form. 5/455 useless extension candidates. Maximal degree in co-relation 431. Up to 130 conditions per place. [2022-09-16 12:06:01,003 INFO L137 encePairwiseOnDemand]: 85/94 looper letters, 25 selfloop transitions, 4 changer transitions 1/90 dead transitions. [2022-09-16 12:06:01,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 90 transitions, 298 flow [2022-09-16 12:06:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:01,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:01,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 375 transitions. [2022-09-16 12:06:01,004 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7978723404255319 [2022-09-16 12:06:01,004 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 375 transitions. [2022-09-16 12:06:01,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 375 transitions. [2022-09-16 12:06:01,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:01,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 375 transitions. [2022-09-16 12:06:01,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,006 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,006 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 232 flow. Second operand 5 states and 375 transitions. [2022-09-16 12:06:01,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 90 transitions, 298 flow [2022-09-16 12:06:01,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 90 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-16 12:06:01,008 INFO L231 Difference]: Finished difference. Result has 96 places, 85 transitions, 256 flow [2022-09-16 12:06:01,008 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=96, PETRI_TRANSITIONS=85} [2022-09-16 12:06:01,009 INFO L287 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2022-09-16 12:06:01,009 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 85 transitions, 256 flow [2022-09-16 12:06:01,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:01,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:01,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-09-16 12:06:01,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:01,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:01,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1490972272, now seen corresponding path program 1 times [2022-09-16 12:06:01,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:01,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440443479] [2022-09-16 12:06:01,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:01,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 12:06:01,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:01,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440443479] [2022-09-16 12:06:01,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440443479] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:01,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:01,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:01,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882114208] [2022-09-16 12:06:01,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:01,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:01,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:01,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:01,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:01,033 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 94 [2022-09-16 12:06:01,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:01,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 94 [2022-09-16 12:06:01,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:01,092 INFO L130 PetriNetUnfolder]: 53/521 cut-off events. [2022-09-16 12:06:01,092 INFO L131 PetriNetUnfolder]: For 281/281 co-relation queries the response was YES. [2022-09-16 12:06:01,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 521 events. 53/521 cut-off events. For 281/281 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1963 event pairs, 23 based on Foata normal form. 4/463 useless extension candidates. Maximal degree in co-relation 736. Up to 92 conditions per place. [2022-09-16 12:06:01,094 INFO L137 encePairwiseOnDemand]: 88/94 looper letters, 17 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2022-09-16 12:06:01,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 85 transitions, 304 flow [2022-09-16 12:06:01,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 363 transitions. [2022-09-16 12:06:01,095 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7723404255319148 [2022-09-16 12:06:01,095 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 363 transitions. [2022-09-16 12:06:01,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 363 transitions. [2022-09-16 12:06:01,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:01,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 363 transitions. [2022-09-16 12:06:01,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.6) internal successors, (363), 5 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,097 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,097 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 256 flow. Second operand 5 states and 363 transitions. [2022-09-16 12:06:01,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 85 transitions, 304 flow [2022-09-16 12:06:01,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 85 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:06:01,102 INFO L231 Difference]: Finished difference. Result has 98 places, 85 transitions, 274 flow [2022-09-16 12:06:01,102 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=98, PETRI_TRANSITIONS=85} [2022-09-16 12:06:01,102 INFO L287 CegarLoopForPetriNet]: 90 programPoint places, 8 predicate places. [2022-09-16 12:06:01,102 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 85 transitions, 274 flow [2022-09-16 12:06:01,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:01,103 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:01,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-09-16 12:06:01,103 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:01,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1024499337, now seen corresponding path program 1 times [2022-09-16 12:06:01,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:01,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419795004] [2022-09-16 12:06:01,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:01,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:01,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:01,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419795004] [2022-09-16 12:06:01,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419795004] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:01,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362663850] [2022-09-16 12:06:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:01,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:01,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:01,132 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:01,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-16 12:06:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:01,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 12:06:01,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:01,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 12:06:01,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362663850] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:01,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 12:06:01,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 12:06:01,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628414940] [2022-09-16 12:06:01,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:01,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 12:06:01,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:01,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 12:06:01,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 12:06:01,222 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 94 [2022-09-16 12:06:01,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 85 transitions, 274 flow. Second operand has 6 states, 6 states have (on average 70.66666666666667) internal successors, (424), 6 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:01,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 94 [2022-09-16 12:06:01,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:01,328 INFO L130 PetriNetUnfolder]: 53/517 cut-off events. [2022-09-16 12:06:01,328 INFO L131 PetriNetUnfolder]: For 302/302 co-relation queries the response was YES. [2022-09-16 12:06:01,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 517 events. 53/517 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1974 event pairs, 23 based on Foata normal form. 4/459 useless extension candidates. Maximal degree in co-relation 457. Up to 104 conditions per place. [2022-09-16 12:06:01,331 INFO L137 encePairwiseOnDemand]: 89/94 looper letters, 21 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2022-09-16 12:06:01,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 87 transitions, 330 flow [2022-09-16 12:06:01,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 12:06:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 12:06:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 504 transitions. [2022-09-16 12:06:01,333 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7659574468085106 [2022-09-16 12:06:01,333 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 504 transitions. [2022-09-16 12:06:01,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 504 transitions. [2022-09-16 12:06:01,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:01,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 504 transitions. [2022-09-16 12:06:01,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.0) internal successors, (504), 7 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) [2022-09-16 12:06:01,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 94.0) internal successors, (752), 8 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,337 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 94.0) internal successors, (752), 8 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,337 INFO L175 Difference]: Start difference. First operand has 98 places, 85 transitions, 274 flow. Second operand 7 states and 504 transitions. [2022-09-16 12:06:01,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 87 transitions, 330 flow [2022-09-16 12:06:01,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 87 transitions, 318 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:06:01,338 INFO L231 Difference]: Finished difference. Result has 100 places, 84 transitions, 270 flow [2022-09-16 12:06:01,339 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=270, PETRI_PLACES=100, PETRI_TRANSITIONS=84} [2022-09-16 12:06:01,339 INFO L287 CegarLoopForPetriNet]: 90 programPoint places, 10 predicate places. [2022-09-16 12:06:01,339 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 84 transitions, 270 flow [2022-09-16 12:06:01,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.66666666666667) internal successors, (424), 6 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:01,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:01,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-09-16 12:06:01,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:01,556 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:01,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:01,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2114867653, now seen corresponding path program 1 times [2022-09-16 12:06:01,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:01,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93091381] [2022-09-16 12:06:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:01,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:01,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:01,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93091381] [2022-09-16 12:06:01,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93091381] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:01,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058964803] [2022-09-16 12:06:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:01,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:01,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:01,620 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:01,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-16 12:06:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:01,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:06:01,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:01,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:06:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:01,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058964803] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:06:01,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:06:01,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-16 12:06:01,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582621507] [2022-09-16 12:06:01,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:06:01,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 12:06:01,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:01,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 12:06:01,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-16 12:06:01,779 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 94 [2022-09-16 12:06:01,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 84 transitions, 270 flow. Second operand has 10 states, 10 states have (on average 71.0) internal successors, (710), 10 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:01,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 94 [2022-09-16 12:06:01,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:01,904 INFO L130 PetriNetUnfolder]: 51/511 cut-off events. [2022-09-16 12:06:01,904 INFO L131 PetriNetUnfolder]: For 309/309 co-relation queries the response was YES. [2022-09-16 12:06:01,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 511 events. 51/511 cut-off events. For 309/309 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2097 event pairs, 27 based on Foata normal form. 2/451 useless extension candidates. Maximal degree in co-relation 443. Up to 91 conditions per place. [2022-09-16 12:06:01,907 INFO L137 encePairwiseOnDemand]: 88/94 looper letters, 26 selfloop transitions, 9 changer transitions 0/95 dead transitions. [2022-09-16 12:06:01,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 95 transitions, 378 flow [2022-09-16 12:06:01,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-16 12:06:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-16 12:06:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 649 transitions. [2022-09-16 12:06:01,910 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7671394799054374 [2022-09-16 12:06:01,910 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 649 transitions. [2022-09-16 12:06:01,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 649 transitions. [2022-09-16 12:06:01,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:01,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 649 transitions. [2022-09-16 12:06:01,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 72.11111111111111) internal successors, (649), 9 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 94.0) internal successors, (940), 10 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,914 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 94.0) internal successors, (940), 10 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,914 INFO L175 Difference]: Start difference. First operand has 100 places, 84 transitions, 270 flow. Second operand 9 states and 649 transitions. [2022-09-16 12:06:01,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 95 transitions, 378 flow [2022-09-16 12:06:01,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 95 transitions, 365 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-09-16 12:06:01,917 INFO L231 Difference]: Finished difference. Result has 107 places, 88 transitions, 317 flow [2022-09-16 12:06:01,917 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=317, PETRI_PLACES=107, PETRI_TRANSITIONS=88} [2022-09-16 12:06:01,917 INFO L287 CegarLoopForPetriNet]: 90 programPoint places, 17 predicate places. [2022-09-16 12:06:01,917 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 88 transitions, 317 flow [2022-09-16 12:06:01,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 71.0) internal successors, (710), 10 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:01,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:01,918 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:01,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-09-16 12:06:02,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-09-16 12:06:02,132 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:02,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:02,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1453004974, now seen corresponding path program 1 times [2022-09-16 12:06:02,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:02,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417190565] [2022-09-16 12:06:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:02,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-09-16 12:06:02,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:02,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417190565] [2022-09-16 12:06:02,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417190565] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:02,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:02,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:02,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005187040] [2022-09-16 12:06:02,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:02,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:02,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:02,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:02,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:02,161 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 94 [2022-09-16 12:06:02,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 88 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:02,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 94 [2022-09-16 12:06:02,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:02,261 INFO L130 PetriNetUnfolder]: 56/554 cut-off events. [2022-09-16 12:06:02,261 INFO L131 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-09-16 12:06:02,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1159 conditions, 554 events. 56/554 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2474 event pairs, 8 based on Foata normal form. 0/502 useless extension candidates. Maximal degree in co-relation 634. Up to 338 conditions per place. [2022-09-16 12:06:02,264 INFO L137 encePairwiseOnDemand]: 88/94 looper letters, 29 selfloop transitions, 4 changer transitions 0/100 dead transitions. [2022-09-16 12:06:02,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 100 transitions, 422 flow [2022-09-16 12:06:02,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 375 transitions. [2022-09-16 12:06:02,265 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7978723404255319 [2022-09-16 12:06:02,266 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 375 transitions. [2022-09-16 12:06:02,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 375 transitions. [2022-09-16 12:06:02,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:02,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 375 transitions. [2022-09-16 12:06:02,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,268 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,268 INFO L175 Difference]: Start difference. First operand has 107 places, 88 transitions, 317 flow. Second operand 5 states and 375 transitions. [2022-09-16 12:06:02,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 100 transitions, 422 flow [2022-09-16 12:06:02,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 100 transitions, 408 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-09-16 12:06:02,270 INFO L231 Difference]: Finished difference. Result has 110 places, 91 transitions, 333 flow [2022-09-16 12:06:02,271 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=110, PETRI_TRANSITIONS=91} [2022-09-16 12:06:02,271 INFO L287 CegarLoopForPetriNet]: 90 programPoint places, 20 predicate places. [2022-09-16 12:06:02,271 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 91 transitions, 333 flow [2022-09-16 12:06:02,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:02,272 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:02,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-09-16 12:06:02,272 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:02,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:02,272 INFO L85 PathProgramCache]: Analyzing trace with hash 284979004, now seen corresponding path program 1 times [2022-09-16 12:06:02,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:02,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514184346] [2022-09-16 12:06:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:02,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-09-16 12:06:02,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:02,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514184346] [2022-09-16 12:06:02,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514184346] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:02,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:02,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:02,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356766843] [2022-09-16 12:06:02,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:02,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:02,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:02,302 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 94 [2022-09-16 12:06:02,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 91 transitions, 333 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:02,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 94 [2022-09-16 12:06:02,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:02,390 INFO L130 PetriNetUnfolder]: 56/528 cut-off events. [2022-09-16 12:06:02,390 INFO L131 PetriNetUnfolder]: For 257/257 co-relation queries the response was YES. [2022-09-16 12:06:02,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 528 events. 56/528 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2245 event pairs, 34 based on Foata normal form. 26/554 useless extension candidates. Maximal degree in co-relation 705. Up to 158 conditions per place. [2022-09-16 12:06:02,393 INFO L137 encePairwiseOnDemand]: 88/94 looper letters, 16 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2022-09-16 12:06:02,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 91 transitions, 379 flow [2022-09-16 12:06:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 362 transitions. [2022-09-16 12:06:02,394 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7702127659574468 [2022-09-16 12:06:02,394 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 362 transitions. [2022-09-16 12:06:02,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 362 transitions. [2022-09-16 12:06:02,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:02,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 362 transitions. [2022-09-16 12:06:02,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,396 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,396 INFO L175 Difference]: Start difference. First operand has 110 places, 91 transitions, 333 flow. Second operand 5 states and 362 transitions. [2022-09-16 12:06:02,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 91 transitions, 379 flow [2022-09-16 12:06:02,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 91 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:06:02,398 INFO L231 Difference]: Finished difference. Result has 113 places, 91 transitions, 351 flow [2022-09-16 12:06:02,398 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=113, PETRI_TRANSITIONS=91} [2022-09-16 12:06:02,399 INFO L287 CegarLoopForPetriNet]: 90 programPoint places, 23 predicate places. [2022-09-16 12:06:02,399 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 91 transitions, 351 flow [2022-09-16 12:06:02,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:02,399 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:02,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-09-16 12:06:02,399 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:02,400 INFO L85 PathProgramCache]: Analyzing trace with hash -129186581, now seen corresponding path program 1 times [2022-09-16 12:06:02,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:02,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361053134] [2022-09-16 12:06:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:02,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:06:02,420 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-16 12:06:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:06:02,444 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-16 12:06:02,444 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-16 12:06:02,444 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-09-16 12:06:02,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2022-09-16 12:06:02,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2022-09-16 12:06:02,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 5 remaining) [2022-09-16 12:06:02,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 5 remaining) [2022-09-16 12:06:02,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-09-16 12:06:02,444 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:02,445 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-16 12:06:02,445 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-09-16 12:06:02,461 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-09-16 12:06:02,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 101 transitions, 280 flow [2022-09-16 12:06:02,549 INFO L130 PetriNetUnfolder]: 213/1524 cut-off events. [2022-09-16 12:06:02,549 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-09-16 12:06:02,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 1524 events. 213/1524 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 8833 event pairs, 72 based on Foata normal form. 0/1237 useless extension candidates. Maximal degree in co-relation 910. Up to 192 conditions per place. [2022-09-16 12:06:02,554 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 101 transitions, 280 flow [2022-09-16 12:06:02,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 93 transitions, 264 flow [2022-09-16 12:06:02,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 12:06:02,559 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=false, 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;@5ea4da82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 12:06:02,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-09-16 12:06:02,561 INFO L130 PetriNetUnfolder]: 2/40 cut-off events. [2022-09-16 12:06:02,561 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 12:06:02,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:02,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:02,561 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:02,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1870303402, now seen corresponding path program 1 times [2022-09-16 12:06:02,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:02,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576612170] [2022-09-16 12:06:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:02,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:02,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:02,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576612170] [2022-09-16 12:06:02,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576612170] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:02,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:02,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:02,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006180533] [2022-09-16 12:06:02,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:02,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:02,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:02,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:02,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:02,578 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 101 [2022-09-16 12:06:02,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:02,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 101 [2022-09-16 12:06:02,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:02,696 INFO L130 PetriNetUnfolder]: 134/985 cut-off events. [2022-09-16 12:06:02,696 INFO L131 PetriNetUnfolder]: For 626/626 co-relation queries the response was YES. [2022-09-16 12:06:02,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 985 events. 134/985 cut-off events. For 626/626 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4983 event pairs, 72 based on Foata normal form. 6/843 useless extension candidates. Maximal degree in co-relation 777. Up to 253 conditions per place. [2022-09-16 12:06:02,700 INFO L137 encePairwiseOnDemand]: 92/101 looper letters, 27 selfloop transitions, 4 changer transitions 1/97 dead transitions. [2022-09-16 12:06:02,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 97 transitions, 334 flow [2022-09-16 12:06:02,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:02,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 402 transitions. [2022-09-16 12:06:02,701 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7960396039603961 [2022-09-16 12:06:02,701 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 402 transitions. [2022-09-16 12:06:02,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 402 transitions. [2022-09-16 12:06:02,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:02,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 402 transitions. [2022-09-16 12:06:02,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.4) internal successors, (402), 5 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,702 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,702 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 264 flow. Second operand 5 states and 402 transitions. [2022-09-16 12:06:02,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 97 transitions, 334 flow [2022-09-16 12:06:02,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 97 transitions, 334 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-16 12:06:02,704 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 288 flow [2022-09-16 12:06:02,704 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2022-09-16 12:06:02,704 INFO L287 CegarLoopForPetriNet]: 98 programPoint places, 6 predicate places. [2022-09-16 12:06:02,704 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 288 flow [2022-09-16 12:06:02,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:02,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:02,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-09-16 12:06:02,705 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:02,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:02,705 INFO L85 PathProgramCache]: Analyzing trace with hash -53248545, now seen corresponding path program 1 times [2022-09-16 12:06:02,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:02,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071293974] [2022-09-16 12:06:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:02,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 12:06:02,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:02,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071293974] [2022-09-16 12:06:02,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071293974] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:02,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:02,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:02,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989491459] [2022-09-16 12:06:02,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:02,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:02,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:02,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:02,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:02,722 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 101 [2022-09-16 12:06:02,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:02,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 101 [2022-09-16 12:06:02,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:02,814 INFO L130 PetriNetUnfolder]: 134/974 cut-off events. [2022-09-16 12:06:02,815 INFO L131 PetriNetUnfolder]: For 638/638 co-relation queries the response was YES. [2022-09-16 12:06:02,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1499 conditions, 974 events. 134/974 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4896 event pairs, 72 based on Foata normal form. 5/853 useless extension candidates. Maximal degree in co-relation 1436. Up to 206 conditions per place. [2022-09-16 12:06:02,820 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 19 selfloop transitions, 8 changer transitions 0/92 dead transitions. [2022-09-16 12:06:02,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 92 transitions, 340 flow [2022-09-16 12:06:02,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 390 transitions. [2022-09-16 12:06:02,821 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7722772277227723 [2022-09-16 12:06:02,821 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 390 transitions. [2022-09-16 12:06:02,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 390 transitions. [2022-09-16 12:06:02,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:02,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 390 transitions. [2022-09-16 12:06:02,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,822 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,823 INFO L175 Difference]: Start difference. First operand has 104 places, 92 transitions, 288 flow. Second operand 5 states and 390 transitions. [2022-09-16 12:06:02,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 92 transitions, 340 flow [2022-09-16 12:06:02,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 92 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:06:02,824 INFO L231 Difference]: Finished difference. Result has 106 places, 92 transitions, 306 flow [2022-09-16 12:06:02,824 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=106, PETRI_TRANSITIONS=92} [2022-09-16 12:06:02,825 INFO L287 CegarLoopForPetriNet]: 98 programPoint places, 8 predicate places. [2022-09-16 12:06:02,825 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 92 transitions, 306 flow [2022-09-16 12:06:02,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:02,825 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:02,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-09-16 12:06:02,825 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:02,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:02,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1650704307, now seen corresponding path program 1 times [2022-09-16 12:06:02,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:02,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832672255] [2022-09-16 12:06:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:02,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:02,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:02,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832672255] [2022-09-16 12:06:02,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832672255] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:02,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551216888] [2022-09-16 12:06:02,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:02,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:02,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:02,863 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:02,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-16 12:06:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:02,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 12:06:02,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:02,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 12:06:02,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551216888] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:02,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 12:06:02,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 12:06:02,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093075212] [2022-09-16 12:06:02,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:02,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 12:06:02,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:02,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 12:06:02,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 12:06:02,954 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 101 [2022-09-16 12:06:02,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 92 transitions, 306 flow. Second operand has 6 states, 6 states have (on average 75.66666666666667) internal successors, (454), 6 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:02,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:02,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 101 [2022-09-16 12:06:02,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:03,068 INFO L130 PetriNetUnfolder]: 134/969 cut-off events. [2022-09-16 12:06:03,069 INFO L131 PetriNetUnfolder]: For 663/663 co-relation queries the response was YES. [2022-09-16 12:06:03,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1516 conditions, 969 events. 134/969 cut-off events. For 663/663 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4836 event pairs, 72 based on Foata normal form. 5/848 useless extension candidates. Maximal degree in co-relation 807. Up to 221 conditions per place. [2022-09-16 12:06:03,074 INFO L137 encePairwiseOnDemand]: 96/101 looper letters, 23 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2022-09-16 12:06:03,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 94 transitions, 366 flow [2022-09-16 12:06:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 12:06:03,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 12:06:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 541 transitions. [2022-09-16 12:06:03,075 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7652050919377652 [2022-09-16 12:06:03,075 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 541 transitions. [2022-09-16 12:06:03,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 541 transitions. [2022-09-16 12:06:03,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:03,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 541 transitions. [2022-09-16 12:06:03,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.28571428571429) internal successors, (541), 7 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:03,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 101.0) internal successors, (808), 8 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:03,077 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 101.0) internal successors, (808), 8 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:03,077 INFO L175 Difference]: Start difference. First operand has 106 places, 92 transitions, 306 flow. Second operand 7 states and 541 transitions. [2022-09-16 12:06:03,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 94 transitions, 366 flow [2022-09-16 12:06:03,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 94 transitions, 354 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:06:03,079 INFO L231 Difference]: Finished difference. Result has 108 places, 91 transitions, 302 flow [2022-09-16 12:06:03,079 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=302, PETRI_PLACES=108, PETRI_TRANSITIONS=91} [2022-09-16 12:06:03,079 INFO L287 CegarLoopForPetriNet]: 98 programPoint places, 10 predicate places. [2022-09-16 12:06:03,079 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 91 transitions, 302 flow [2022-09-16 12:06:03,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.66666666666667) internal successors, (454), 6 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:03,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:03,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:03,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-16 12:06:03,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-09-16 12:06:03,295 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:03,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:03,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1682203319, now seen corresponding path program 1 times [2022-09-16 12:06:03,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:03,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853503187] [2022-09-16 12:06:03,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:03,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:03,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:03,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853503187] [2022-09-16 12:06:03,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853503187] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:03,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965855122] [2022-09-16 12:06:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:03,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:03,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:03,330 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:03,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-09-16 12:06:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:03,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:06:03,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:03,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:06:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:03,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965855122] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:06:03,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:06:03,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-16 12:06:03,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982127747] [2022-09-16 12:06:03,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:06:03,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 12:06:03,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:03,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 12:06:03,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-16 12:06:03,440 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 101 [2022-09-16 12:06:03,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 91 transitions, 302 flow. Second operand has 10 states, 10 states have (on average 76.0) internal successors, (760), 10 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:03,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:03,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 101 [2022-09-16 12:06:03,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:03,564 INFO L130 PetriNetUnfolder]: 132/963 cut-off events. [2022-09-16 12:06:03,564 INFO L131 PetriNetUnfolder]: For 671/671 co-relation queries the response was YES. [2022-09-16 12:06:03,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1502 conditions, 963 events. 132/963 cut-off events. For 671/671 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 5034 event pairs, 76 based on Foata normal form. 2/839 useless extension candidates. Maximal degree in co-relation 792. Up to 206 conditions per place. [2022-09-16 12:06:03,568 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 28 selfloop transitions, 9 changer transitions 0/102 dead transitions. [2022-09-16 12:06:03,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 102 transitions, 414 flow [2022-09-16 12:06:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-16 12:06:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-16 12:06:03,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 696 transitions. [2022-09-16 12:06:03,570 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7656765676567657 [2022-09-16 12:06:03,570 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 696 transitions. [2022-09-16 12:06:03,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 696 transitions. [2022-09-16 12:06:03,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:03,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 696 transitions. [2022-09-16 12:06:03,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 77.33333333333333) internal successors, (696), 9 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:03,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:03,582 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:03,582 INFO L175 Difference]: Start difference. First operand has 108 places, 91 transitions, 302 flow. Second operand 9 states and 696 transitions. [2022-09-16 12:06:03,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 102 transitions, 414 flow [2022-09-16 12:06:03,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 102 transitions, 401 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-09-16 12:06:03,584 INFO L231 Difference]: Finished difference. Result has 115 places, 95 transitions, 349 flow [2022-09-16 12:06:03,584 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=349, PETRI_PLACES=115, PETRI_TRANSITIONS=95} [2022-09-16 12:06:03,585 INFO L287 CegarLoopForPetriNet]: 98 programPoint places, 17 predicate places. [2022-09-16 12:06:03,585 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 95 transitions, 349 flow [2022-09-16 12:06:03,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.0) internal successors, (760), 10 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:03,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:03,585 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:03,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-09-16 12:06:03,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-09-16 12:06:03,803 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:03,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1893580084, now seen corresponding path program 1 times [2022-09-16 12:06:03,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:03,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909592456] [2022-09-16 12:06:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:03,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-09-16 12:06:03,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:03,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909592456] [2022-09-16 12:06:03,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909592456] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:03,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:03,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:03,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273914630] [2022-09-16 12:06:03,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:03,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:03,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:03,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:03,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:03,830 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 101 [2022-09-16 12:06:03,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 95 transitions, 349 flow. Second operand has 4 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:03,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:03,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 101 [2022-09-16 12:06:03,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:04,011 INFO L130 PetriNetUnfolder]: 141/1041 cut-off events. [2022-09-16 12:06:04,012 INFO L131 PetriNetUnfolder]: For 344/344 co-relation queries the response was YES. [2022-09-16 12:06:04,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 1041 events. 141/1041 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5788 event pairs, 31 based on Foata normal form. 0/927 useless extension candidates. Maximal degree in co-relation 1183. Up to 737 conditions per place. [2022-09-16 12:06:04,017 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 32 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2022-09-16 12:06:04,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 108 transitions, 465 flow [2022-09-16 12:06:04,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 403 transitions. [2022-09-16 12:06:04,019 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7980198019801981 [2022-09-16 12:06:04,019 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 403 transitions. [2022-09-16 12:06:04,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 403 transitions. [2022-09-16 12:06:04,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:04,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 403 transitions. [2022-09-16 12:06:04,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:04,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:04,021 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:04,021 INFO L175 Difference]: Start difference. First operand has 115 places, 95 transitions, 349 flow. Second operand 5 states and 403 transitions. [2022-09-16 12:06:04,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 108 transitions, 465 flow [2022-09-16 12:06:04,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 108 transitions, 451 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-09-16 12:06:04,024 INFO L231 Difference]: Finished difference. Result has 118 places, 98 transitions, 365 flow [2022-09-16 12:06:04,024 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=365, PETRI_PLACES=118, PETRI_TRANSITIONS=98} [2022-09-16 12:06:04,024 INFO L287 CegarLoopForPetriNet]: 98 programPoint places, 20 predicate places. [2022-09-16 12:06:04,024 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 98 transitions, 365 flow [2022-09-16 12:06:04,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:04,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:04,025 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:04,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-09-16 12:06:04,025 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:04,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:04,025 INFO L85 PathProgramCache]: Analyzing trace with hash 648324514, now seen corresponding path program 1 times [2022-09-16 12:06:04,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:04,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153705934] [2022-09-16 12:06:04,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:04,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-09-16 12:06:04,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:04,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153705934] [2022-09-16 12:06:04,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153705934] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:04,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:04,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:04,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349351219] [2022-09-16 12:06:04,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:04,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:04,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:04,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:04,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:04,052 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 101 [2022-09-16 12:06:04,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 98 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 77.5) internal successors, (310), 4 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:04,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:04,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 101 [2022-09-16 12:06:04,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:04,211 INFO L130 PetriNetUnfolder]: 141/984 cut-off events. [2022-09-16 12:06:04,211 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2022-09-16 12:06:04,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 984 events. 141/984 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5225 event pairs, 88 based on Foata normal form. 57/1041 useless extension candidates. Maximal degree in co-relation 1314. Up to 342 conditions per place. [2022-09-16 12:06:04,219 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 18 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2022-09-16 12:06:04,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 98 transitions, 415 flow [2022-09-16 12:06:04,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:04,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:04,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 389 transitions. [2022-09-16 12:06:04,220 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7702970297029703 [2022-09-16 12:06:04,221 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 389 transitions. [2022-09-16 12:06:04,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 389 transitions. [2022-09-16 12:06:04,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:04,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 389 transitions. [2022-09-16 12:06:04,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:04,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:04,222 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:04,223 INFO L175 Difference]: Start difference. First operand has 118 places, 98 transitions, 365 flow. Second operand 5 states and 389 transitions. [2022-09-16 12:06:04,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 98 transitions, 415 flow [2022-09-16 12:06:04,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 98 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:06:04,227 INFO L231 Difference]: Finished difference. Result has 121 places, 98 transitions, 383 flow [2022-09-16 12:06:04,227 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=383, PETRI_PLACES=121, PETRI_TRANSITIONS=98} [2022-09-16 12:06:04,227 INFO L287 CegarLoopForPetriNet]: 98 programPoint places, 23 predicate places. [2022-09-16 12:06:04,227 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 98 transitions, 383 flow [2022-09-16 12:06:04,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.5) internal successors, (310), 4 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:04,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:04,228 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:04,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-09-16 12:06:04,228 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:04,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:04,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1376775983, now seen corresponding path program 1 times [2022-09-16 12:06:04,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:04,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185819598] [2022-09-16 12:06:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:04,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:04,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:04,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185819598] [2022-09-16 12:06:04,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185819598] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:04,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690682700] [2022-09-16 12:06:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:04,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:04,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:04,307 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:04,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-09-16 12:06:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:04,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-16 12:06:04,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:04,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:06:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:04,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690682700] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:06:04,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:06:04,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-09-16 12:06:04,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89096834] [2022-09-16 12:06:04,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:06:04,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-16 12:06:04,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:04,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-16 12:06:04,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-09-16 12:06:04,562 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 101 [2022-09-16 12:06:04,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 98 transitions, 383 flow. Second operand has 18 states, 18 states have (on average 76.5) internal successors, (1377), 18 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:04,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:04,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 101 [2022-09-16 12:06:04,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:04,755 INFO L130 PetriNetUnfolder]: 0/127 cut-off events. [2022-09-16 12:06:04,755 INFO L131 PetriNetUnfolder]: For 121/121 co-relation queries the response was YES. [2022-09-16 12:06:04,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 127 events. 0/127 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 60 event pairs, 0 based on Foata normal form. 4/131 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2022-09-16 12:06:04,758 INFO L137 encePairwiseOnDemand]: 96/101 looper letters, 33 selfloop transitions, 19 changer transitions 0/105 dead transitions. [2022-09-16 12:06:04,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 105 transitions, 505 flow [2022-09-16 12:06:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-16 12:06:04,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-16 12:06:04,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1589 transitions. [2022-09-16 12:06:04,760 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7491749174917491 [2022-09-16 12:06:04,760 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1589 transitions. [2022-09-16 12:06:04,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1589 transitions. [2022-09-16 12:06:04,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:04,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1589 transitions. [2022-09-16 12:06:04,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 75.66666666666667) internal successors, (1589), 21 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:04,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:04,767 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:04,774 INFO L175 Difference]: Start difference. First operand has 121 places, 98 transitions, 383 flow. Second operand 21 states and 1589 transitions. [2022-09-16 12:06:04,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 105 transitions, 505 flow [2022-09-16 12:06:04,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 105 transitions, 456 flow, removed 19 selfloop flow, removed 2 redundant places. [2022-09-16 12:06:04,777 INFO L231 Difference]: Finished difference. Result has 120 places, 85 transitions, 331 flow [2022-09-16 12:06:04,777 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=331, PETRI_PLACES=120, PETRI_TRANSITIONS=85} [2022-09-16 12:06:04,778 INFO L287 CegarLoopForPetriNet]: 98 programPoint places, 22 predicate places. [2022-09-16 12:06:04,778 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 85 transitions, 331 flow [2022-09-16 12:06:04,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 76.5) internal successors, (1377), 18 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:04,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:04,779 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:04,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-09-16 12:06:04,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-09-16 12:06:04,995 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:04,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:04,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1846637765, now seen corresponding path program 1 times [2022-09-16 12:06:04,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:04,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231099143] [2022-09-16 12:06:04,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:04,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:06:05,008 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-16 12:06:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:06:05,037 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-16 12:06:05,037 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-16 12:06:05,037 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-09-16 12:06:05,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2022-09-16 12:06:05,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2022-09-16 12:06:05,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 5 remaining) [2022-09-16 12:06:05,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 5 remaining) [2022-09-16 12:06:05,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-09-16 12:06:05,038 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:05,040 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-16 12:06:05,040 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-09-16 12:06:05,059 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-09-16 12:06:05,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 108 transitions, 314 flow [2022-09-16 12:06:05,311 INFO L130 PetriNetUnfolder]: 472/2958 cut-off events. [2022-09-16 12:06:05,311 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-09-16 12:06:05,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3456 conditions, 2958 events. 472/2958 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 20925 event pairs, 201 based on Foata normal form. 0/2410 useless extension candidates. Maximal degree in co-relation 1745. Up to 448 conditions per place. [2022-09-16 12:06:05,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 108 transitions, 314 flow [2022-09-16 12:06:05,328 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 100 transitions, 298 flow [2022-09-16 12:06:05,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 12:06:05,330 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=false, 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;@5ea4da82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 12:06:05,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-09-16 12:06:05,331 INFO L130 PetriNetUnfolder]: 2/41 cut-off events. [2022-09-16 12:06:05,331 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 12:06:05,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:05,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:05,331 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:05,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:05,332 INFO L85 PathProgramCache]: Analyzing trace with hash -106960825, now seen corresponding path program 1 times [2022-09-16 12:06:05,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:05,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137047479] [2022-09-16 12:06:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:05,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:05,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137047479] [2022-09-16 12:06:05,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137047479] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:05,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:05,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:05,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656996314] [2022-09-16 12:06:05,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:05,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:05,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:05,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:05,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:05,356 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 108 [2022-09-16 12:06:05,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 100 transitions, 298 flow. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:05,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:05,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 108 [2022-09-16 12:06:05,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:05,528 INFO L130 PetriNetUnfolder]: 327/1904 cut-off events. [2022-09-16 12:06:05,528 INFO L131 PetriNetUnfolder]: For 1421/1421 co-relation queries the response was YES. [2022-09-16 12:06:05,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2930 conditions, 1904 events. 327/1904 cut-off events. For 1421/1421 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 11907 event pairs, 201 based on Foata normal form. 7/1631 useless extension candidates. Maximal degree in co-relation 1476. Up to 520 conditions per place. [2022-09-16 12:06:05,539 INFO L137 encePairwiseOnDemand]: 99/108 looper letters, 29 selfloop transitions, 4 changer transitions 1/104 dead transitions. [2022-09-16 12:06:05,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 104 transitions, 372 flow [2022-09-16 12:06:05,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:05,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 429 transitions. [2022-09-16 12:06:05,542 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7944444444444444 [2022-09-16 12:06:05,543 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 429 transitions. [2022-09-16 12:06:05,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 429 transitions. [2022-09-16 12:06:05,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:05,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 429 transitions. [2022-09-16 12:06:05,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:05,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 108.0) internal successors, (648), 6 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:05,544 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 108.0) internal successors, (648), 6 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:05,544 INFO L175 Difference]: Start difference. First operand has 106 places, 100 transitions, 298 flow. Second operand 5 states and 429 transitions. [2022-09-16 12:06:05,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 104 transitions, 372 flow [2022-09-16 12:06:05,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 104 transitions, 372 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-16 12:06:05,546 INFO L231 Difference]: Finished difference. Result has 112 places, 99 transitions, 322 flow [2022-09-16 12:06:05,546 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=112, PETRI_TRANSITIONS=99} [2022-09-16 12:06:05,549 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, 6 predicate places. [2022-09-16 12:06:05,549 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 99 transitions, 322 flow [2022-09-16 12:06:05,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:05,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:05,549 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:05,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-09-16 12:06:05,549 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:05,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:05,549 INFO L85 PathProgramCache]: Analyzing trace with hash 292633557, now seen corresponding path program 1 times [2022-09-16 12:06:05,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:05,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058685456] [2022-09-16 12:06:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:05,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 12:06:05,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:05,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058685456] [2022-09-16 12:06:05,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058685456] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:05,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:05,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:05,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047793919] [2022-09-16 12:06:05,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:05,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:05,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:05,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:05,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:05,569 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 108 [2022-09-16 12:06:05,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 99 transitions, 322 flow. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:05,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:05,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 108 [2022-09-16 12:06:05,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:05,755 INFO L130 PetriNetUnfolder]: 327/1891 cut-off events. [2022-09-16 12:06:05,756 INFO L131 PetriNetUnfolder]: For 1434/1434 co-relation queries the response was YES. [2022-09-16 12:06:05,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2953 conditions, 1891 events. 327/1891 cut-off events. For 1434/1434 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 11795 event pairs, 201 based on Foata normal form. 6/1643 useless extension candidates. Maximal degree in co-relation 2889. Up to 464 conditions per place. [2022-09-16 12:06:05,764 INFO L137 encePairwiseOnDemand]: 102/108 looper letters, 21 selfloop transitions, 8 changer transitions 0/99 dead transitions. [2022-09-16 12:06:05,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 99 transitions, 378 flow [2022-09-16 12:06:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:05,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 417 transitions. [2022-09-16 12:06:05,765 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7722222222222223 [2022-09-16 12:06:05,765 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 417 transitions. [2022-09-16 12:06:05,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 417 transitions. [2022-09-16 12:06:05,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:05,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 417 transitions. [2022-09-16 12:06:05,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:05,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 108.0) internal successors, (648), 6 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:05,767 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 108.0) internal successors, (648), 6 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:05,767 INFO L175 Difference]: Start difference. First operand has 112 places, 99 transitions, 322 flow. Second operand 5 states and 417 transitions. [2022-09-16 12:06:05,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 99 transitions, 378 flow [2022-09-16 12:06:05,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 99 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:06:05,769 INFO L231 Difference]: Finished difference. Result has 114 places, 99 transitions, 340 flow [2022-09-16 12:06:05,769 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=340, PETRI_PLACES=114, PETRI_TRANSITIONS=99} [2022-09-16 12:06:05,770 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, 8 predicate places. [2022-09-16 12:06:05,770 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 99 transitions, 340 flow [2022-09-16 12:06:05,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:05,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:05,770 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:05,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-09-16 12:06:05,770 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:05,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:05,770 INFO L85 PathProgramCache]: Analyzing trace with hash 481706371, now seen corresponding path program 1 times [2022-09-16 12:06:05,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:05,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236210776] [2022-09-16 12:06:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:05,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:05,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:05,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236210776] [2022-09-16 12:06:05,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236210776] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:05,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800926204] [2022-09-16 12:06:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:05,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:05,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:05,794 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:05,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-09-16 12:06:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:05,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 12:06:05,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:05,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 12:06:05,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800926204] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:05,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 12:06:05,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 12:06:05,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893025466] [2022-09-16 12:06:05,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:05,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 12:06:05,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:05,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 12:06:05,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 12:06:05,890 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 108 [2022-09-16 12:06:05,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 99 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 80.66666666666667) internal successors, (484), 6 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:05,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:05,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 108 [2022-09-16 12:06:05,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:06,118 INFO L130 PetriNetUnfolder]: 327/1885 cut-off events. [2022-09-16 12:06:06,118 INFO L131 PetriNetUnfolder]: For 1463/1463 co-relation queries the response was YES. [2022-09-16 12:06:06,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2972 conditions, 1885 events. 327/1885 cut-off events. For 1463/1463 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 11825 event pairs, 201 based on Foata normal form. 6/1637 useless extension candidates. Maximal degree in co-relation 1510. Up to 482 conditions per place. [2022-09-16 12:06:06,128 INFO L137 encePairwiseOnDemand]: 103/108 looper letters, 25 selfloop transitions, 6 changer transitions 0/101 dead transitions. [2022-09-16 12:06:06,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 101 transitions, 404 flow [2022-09-16 12:06:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 12:06:06,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 12:06:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 578 transitions. [2022-09-16 12:06:06,130 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7645502645502645 [2022-09-16 12:06:06,130 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 578 transitions. [2022-09-16 12:06:06,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 578 transitions. [2022-09-16 12:06:06,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:06,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 578 transitions. [2022-09-16 12:06:06,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.57142857142857) internal successors, (578), 7 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:06,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 108.0) internal successors, (864), 8 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:06,132 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 108.0) internal successors, (864), 8 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:06,132 INFO L175 Difference]: Start difference. First operand has 114 places, 99 transitions, 340 flow. Second operand 7 states and 578 transitions. [2022-09-16 12:06:06,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 101 transitions, 404 flow [2022-09-16 12:06:06,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 101 transitions, 392 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:06:06,134 INFO L231 Difference]: Finished difference. Result has 116 places, 98 transitions, 336 flow [2022-09-16 12:06:06,134 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=336, PETRI_PLACES=116, PETRI_TRANSITIONS=98} [2022-09-16 12:06:06,135 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, 10 predicate places. [2022-09-16 12:06:06,135 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 98 transitions, 336 flow [2022-09-16 12:06:06,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.66666666666667) internal successors, (484), 6 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:06,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:06,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:06,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-09-16 12:06:06,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-09-16 12:06:06,354 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:06,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:06,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1367654922, now seen corresponding path program 1 times [2022-09-16 12:06:06,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:06,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055358952] [2022-09-16 12:06:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:06,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:06,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:06,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055358952] [2022-09-16 12:06:06,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055358952] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:06,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775262765] [2022-09-16 12:06:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:06,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:06,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:06,379 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:06,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-09-16 12:06:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:06,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:06:06,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:06,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:06:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:06,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775262765] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:06:06,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:06:06,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-16 12:06:06,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620669272] [2022-09-16 12:06:06,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:06:06,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 12:06:06,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:06,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 12:06:06,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-16 12:06:06,521 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 108 [2022-09-16 12:06:06,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 98 transitions, 336 flow. Second operand has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:06,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:06,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 108 [2022-09-16 12:06:06,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:06,788 INFO L130 PetriNetUnfolder]: 325/1879 cut-off events. [2022-09-16 12:06:06,789 INFO L131 PetriNetUnfolder]: For 1472/1472 co-relation queries the response was YES. [2022-09-16 12:06:06,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2957 conditions, 1879 events. 325/1879 cut-off events. For 1472/1472 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 11985 event pairs, 205 based on Foata normal form. 2/1627 useless extension candidates. Maximal degree in co-relation 1494. Up to 465 conditions per place. [2022-09-16 12:06:06,802 INFO L137 encePairwiseOnDemand]: 102/108 looper letters, 30 selfloop transitions, 9 changer transitions 0/109 dead transitions. [2022-09-16 12:06:06,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 109 transitions, 452 flow [2022-09-16 12:06:06,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-16 12:06:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-16 12:06:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 743 transitions. [2022-09-16 12:06:06,829 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.76440329218107 [2022-09-16 12:06:06,829 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 743 transitions. [2022-09-16 12:06:06,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 743 transitions. [2022-09-16 12:06:06,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:06,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 743 transitions. [2022-09-16 12:06:06,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 82.55555555555556) internal successors, (743), 9 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:06,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 108.0) internal successors, (1080), 10 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:06,831 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 108.0) internal successors, (1080), 10 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:06,831 INFO L175 Difference]: Start difference. First operand has 116 places, 98 transitions, 336 flow. Second operand 9 states and 743 transitions. [2022-09-16 12:06:06,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 109 transitions, 452 flow [2022-09-16 12:06:06,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 109 transitions, 439 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-09-16 12:06:06,833 INFO L231 Difference]: Finished difference. Result has 123 places, 102 transitions, 383 flow [2022-09-16 12:06:06,833 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=383, PETRI_PLACES=123, PETRI_TRANSITIONS=102} [2022-09-16 12:06:06,834 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, 17 predicate places. [2022-09-16 12:06:06,834 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 102 transitions, 383 flow [2022-09-16 12:06:06,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:06,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:06,835 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:06,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-09-16 12:06:07,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-09-16 12:06:07,043 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1389344269, now seen corresponding path program 1 times [2022-09-16 12:06:07,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:07,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215045822] [2022-09-16 12:06:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:07,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-09-16 12:06:07,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:07,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215045822] [2022-09-16 12:06:07,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215045822] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:07,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:07,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:07,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762970262] [2022-09-16 12:06:07,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:07,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:07,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:07,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:07,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:07,075 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 108 [2022-09-16 12:06:07,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 102 transitions, 383 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:07,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:07,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 108 [2022-09-16 12:06:07,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:07,397 INFO L130 PetriNetUnfolder]: 339/1999 cut-off events. [2022-09-16 12:06:07,397 INFO L131 PetriNetUnfolder]: For 653/653 co-relation queries the response was YES. [2022-09-16 12:06:07,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4334 conditions, 1999 events. 339/1999 cut-off events. For 653/653 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 13264 event pairs, 103 based on Foata normal form. 0/1759 useless extension candidates. Maximal degree in co-relation 2243. Up to 1569 conditions per place. [2022-09-16 12:06:07,414 INFO L137 encePairwiseOnDemand]: 102/108 looper letters, 35 selfloop transitions, 4 changer transitions 0/116 dead transitions. [2022-09-16 12:06:07,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 116 transitions, 510 flow [2022-09-16 12:06:07,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 431 transitions. [2022-09-16 12:06:07,416 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7981481481481482 [2022-09-16 12:06:07,416 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 431 transitions. [2022-09-16 12:06:07,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 431 transitions. [2022-09-16 12:06:07,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:07,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 431 transitions. [2022-09-16 12:06:07,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:07,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 108.0) internal successors, (648), 6 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:07,418 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 108.0) internal successors, (648), 6 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:07,418 INFO L175 Difference]: Start difference. First operand has 123 places, 102 transitions, 383 flow. Second operand 5 states and 431 transitions. [2022-09-16 12:06:07,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 116 transitions, 510 flow [2022-09-16 12:06:07,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 116 transitions, 496 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-09-16 12:06:07,422 INFO L231 Difference]: Finished difference. Result has 126 places, 105 transitions, 399 flow [2022-09-16 12:06:07,422 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=126, PETRI_TRANSITIONS=105} [2022-09-16 12:06:07,422 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, 20 predicate places. [2022-09-16 12:06:07,422 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 105 transitions, 399 flow [2022-09-16 12:06:07,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:07,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:07,423 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:07,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-09-16 12:06:07,423 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:07,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:07,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1036474590, now seen corresponding path program 1 times [2022-09-16 12:06:07,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:07,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673674971] [2022-09-16 12:06:07,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:07,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-09-16 12:06:07,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:07,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673674971] [2022-09-16 12:06:07,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673674971] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:07,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:07,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:07,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069876841] [2022-09-16 12:06:07,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:07,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:07,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:07,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:07,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:07,450 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 108 [2022-09-16 12:06:07,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 105 transitions, 399 flow. Second operand has 4 states, 4 states have (on average 82.5) internal successors, (330), 4 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:07,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:07,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 108 [2022-09-16 12:06:07,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:07,754 INFO L130 PetriNetUnfolder]: 339/1879 cut-off events. [2022-09-16 12:06:07,754 INFO L131 PetriNetUnfolder]: For 870/870 co-relation queries the response was YES. [2022-09-16 12:06:07,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4721 conditions, 1879 events. 339/1879 cut-off events. For 870/870 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 11945 event pairs, 223 based on Foata normal form. 120/1999 useless extension candidates. Maximal degree in co-relation 2472. Up to 735 conditions per place. [2022-09-16 12:06:07,770 INFO L137 encePairwiseOnDemand]: 102/108 looper letters, 20 selfloop transitions, 8 changer transitions 0/105 dead transitions. [2022-09-16 12:06:07,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 105 transitions, 453 flow [2022-09-16 12:06:07,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2022-09-16 12:06:07,772 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2022-09-16 12:06:07,772 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2022-09-16 12:06:07,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2022-09-16 12:06:07,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:07,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2022-09-16 12:06:07,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:07,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 108.0) internal successors, (648), 6 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:07,774 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 108.0) internal successors, (648), 6 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:07,774 INFO L175 Difference]: Start difference. First operand has 126 places, 105 transitions, 399 flow. Second operand 5 states and 416 transitions. [2022-09-16 12:06:07,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 105 transitions, 453 flow [2022-09-16 12:06:07,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 105 transitions, 451 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:06:07,779 INFO L231 Difference]: Finished difference. Result has 129 places, 105 transitions, 417 flow [2022-09-16 12:06:07,780 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=417, PETRI_PLACES=129, PETRI_TRANSITIONS=105} [2022-09-16 12:06:07,780 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, 23 predicate places. [2022-09-16 12:06:07,780 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 105 transitions, 417 flow [2022-09-16 12:06:07,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.5) internal successors, (330), 4 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:07,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:07,780 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:07,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-09-16 12:06:07,781 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:07,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2065940547, now seen corresponding path program 1 times [2022-09-16 12:06:07,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:07,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076184826] [2022-09-16 12:06:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:07,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:07,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:07,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076184826] [2022-09-16 12:06:07,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076184826] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:07,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011791514] [2022-09-16 12:06:07,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:07,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:07,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:07,872 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:07,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-09-16 12:06:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:07,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-16 12:06:07,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:08,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:06:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:08,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011791514] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:06:08,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:06:08,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-09-16 12:06:08,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633032147] [2022-09-16 12:06:08,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:06:08,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-16 12:06:08,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:08,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-16 12:06:08,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-09-16 12:06:08,134 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 108 [2022-09-16 12:06:08,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 105 transitions, 417 flow. Second operand has 18 states, 18 states have (on average 81.5) internal successors, (1467), 18 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:08,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:08,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 108 [2022-09-16 12:06:08,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:08,578 INFO L130 PetriNetUnfolder]: 321/1733 cut-off events. [2022-09-16 12:06:08,578 INFO L131 PetriNetUnfolder]: For 1909/1909 co-relation queries the response was YES. [2022-09-16 12:06:08,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3985 conditions, 1733 events. 321/1733 cut-off events. For 1909/1909 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 11657 event pairs, 321 based on Foata normal form. 4/1737 useless extension candidates. Maximal degree in co-relation 3695. Up to 453 conditions per place. [2022-09-16 12:06:08,593 INFO L137 encePairwiseOnDemand]: 102/108 looper letters, 46 selfloop transitions, 21 changer transitions 0/140 dead transitions. [2022-09-16 12:06:08,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 140 transitions, 713 flow [2022-09-16 12:06:08,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-16 12:06:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-16 12:06:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1709 transitions. [2022-09-16 12:06:08,596 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7535273368606702 [2022-09-16 12:06:08,596 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1709 transitions. [2022-09-16 12:06:08,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1709 transitions. [2022-09-16 12:06:08,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:08,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1709 transitions. [2022-09-16 12:06:08,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 81.38095238095238) internal successors, (1709), 21 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:08,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 108.0) internal successors, (2376), 22 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:08,601 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 108.0) internal successors, (2376), 22 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:08,601 INFO L175 Difference]: Start difference. First operand has 129 places, 105 transitions, 417 flow. Second operand 21 states and 1709 transitions. [2022-09-16 12:06:08,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 140 transitions, 713 flow [2022-09-16 12:06:08,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 140 transitions, 701 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:06:08,609 INFO L231 Difference]: Finished difference. Result has 151 places, 118 transitions, 569 flow [2022-09-16 12:06:08,610 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=569, PETRI_PLACES=151, PETRI_TRANSITIONS=118} [2022-09-16 12:06:08,610 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, 45 predicate places. [2022-09-16 12:06:08,610 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 118 transitions, 569 flow [2022-09-16 12:06:08,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 81.5) internal successors, (1467), 18 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:08,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:08,611 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:08,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-09-16 12:06:08,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:08,826 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:08,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:08,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1657062307, now seen corresponding path program 1 times [2022-09-16 12:06:08,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:08,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891066699] [2022-09-16 12:06:08,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:08,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:06:08,843 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-16 12:06:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:06:08,865 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-16 12:06:08,865 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-16 12:06:08,865 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-09-16 12:06:08,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2022-09-16 12:06:08,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2022-09-16 12:06:08,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 5 remaining) [2022-09-16 12:06:08,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 5 remaining) [2022-09-16 12:06:08,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-09-16 12:06:08,866 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:08,866 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-16 12:06:08,866 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-09-16 12:06:08,881 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-09-16 12:06:08,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 115 transitions, 350 flow [2022-09-16 12:06:09,469 INFO L130 PetriNetUnfolder]: 1051/5864 cut-off events. [2022-09-16 12:06:09,470 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-09-16 12:06:09,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6949 conditions, 5864 events. 1051/5864 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 49879 event pairs, 522 based on Foata normal form. 0/4799 useless extension candidates. Maximal degree in co-relation 3445. Up to 1024 conditions per place. [2022-09-16 12:06:09,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 115 transitions, 350 flow [2022-09-16 12:06:09,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 107 transitions, 334 flow [2022-09-16 12:06:09,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 12:06:09,492 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=false, 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;@5ea4da82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 12:06:09,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-09-16 12:06:09,494 INFO L130 PetriNetUnfolder]: 2/40 cut-off events. [2022-09-16 12:06:09,494 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 12:06:09,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:09,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:09,494 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:09,494 INFO L85 PathProgramCache]: Analyzing trace with hash 2088518911, now seen corresponding path program 1 times [2022-09-16 12:06:09,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:09,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33367576] [2022-09-16 12:06:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:09,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:09,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:09,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33367576] [2022-09-16 12:06:09,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33367576] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:09,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:09,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:09,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748610285] [2022-09-16 12:06:09,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:09,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:09,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:09,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:09,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:09,510 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 115 [2022-09-16 12:06:09,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 107 transitions, 334 flow. Second operand has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:09,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:09,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 115 [2022-09-16 12:06:09,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:09,918 INFO L130 PetriNetUnfolder]: 776/3783 cut-off events. [2022-09-16 12:06:09,919 INFO L131 PetriNetUnfolder]: For 3184/3184 co-relation queries the response was YES. [2022-09-16 12:06:09,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5983 conditions, 3783 events. 776/3783 cut-off events. For 3184/3184 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 28270 event pairs, 522 based on Foata normal form. 8/3251 useless extension candidates. Maximal degree in co-relation 2928. Up to 1107 conditions per place. [2022-09-16 12:06:09,938 INFO L137 encePairwiseOnDemand]: 106/115 looper letters, 31 selfloop transitions, 4 changer transitions 1/111 dead transitions. [2022-09-16 12:06:09,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 111 transitions, 412 flow [2022-09-16 12:06:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:09,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:09,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 456 transitions. [2022-09-16 12:06:09,940 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7930434782608695 [2022-09-16 12:06:09,940 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 456 transitions. [2022-09-16 12:06:09,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 456 transitions. [2022-09-16 12:06:09,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:09,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 456 transitions. [2022-09-16 12:06:09,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:09,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:09,941 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:09,941 INFO L175 Difference]: Start difference. First operand has 114 places, 107 transitions, 334 flow. Second operand 5 states and 456 transitions. [2022-09-16 12:06:09,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 111 transitions, 412 flow [2022-09-16 12:06:09,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 111 transitions, 412 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-16 12:06:09,944 INFO L231 Difference]: Finished difference. Result has 120 places, 106 transitions, 358 flow [2022-09-16 12:06:09,944 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=358, PETRI_PLACES=120, PETRI_TRANSITIONS=106} [2022-09-16 12:06:09,944 INFO L287 CegarLoopForPetriNet]: 114 programPoint places, 6 predicate places. [2022-09-16 12:06:09,944 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 106 transitions, 358 flow [2022-09-16 12:06:09,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:09,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:09,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:09,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-09-16 12:06:09,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:09,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1766348718, now seen corresponding path program 1 times [2022-09-16 12:06:09,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:09,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703453793] [2022-09-16 12:06:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:09,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 12:06:09,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:09,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703453793] [2022-09-16 12:06:09,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703453793] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:09,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:09,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:09,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818980067] [2022-09-16 12:06:09,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:09,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:09,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:09,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:09,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:09,962 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 115 [2022-09-16 12:06:09,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 106 transitions, 358 flow. Second operand has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:09,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:09,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 115 [2022-09-16 12:06:09,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:10,508 INFO L130 PetriNetUnfolder]: 776/3768 cut-off events. [2022-09-16 12:06:10,508 INFO L131 PetriNetUnfolder]: For 3198/3198 co-relation queries the response was YES. [2022-09-16 12:06:10,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6008 conditions, 3768 events. 776/3768 cut-off events. For 3198/3198 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 28427 event pairs, 522 based on Foata normal form. 7/3265 useless extension candidates. Maximal degree in co-relation 5943. Up to 1042 conditions per place. [2022-09-16 12:06:10,524 INFO L137 encePairwiseOnDemand]: 109/115 looper letters, 23 selfloop transitions, 8 changer transitions 0/106 dead transitions. [2022-09-16 12:06:10,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 106 transitions, 418 flow [2022-09-16 12:06:10,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 444 transitions. [2022-09-16 12:06:10,525 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7721739130434783 [2022-09-16 12:06:10,525 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 444 transitions. [2022-09-16 12:06:10,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 444 transitions. [2022-09-16 12:06:10,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:10,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 444 transitions. [2022-09-16 12:06:10,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.8) internal successors, (444), 5 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:10,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:10,526 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:10,526 INFO L175 Difference]: Start difference. First operand has 120 places, 106 transitions, 358 flow. Second operand 5 states and 444 transitions. [2022-09-16 12:06:10,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 106 transitions, 418 flow [2022-09-16 12:06:10,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 106 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:06:10,530 INFO L231 Difference]: Finished difference. Result has 122 places, 106 transitions, 376 flow [2022-09-16 12:06:10,530 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=376, PETRI_PLACES=122, PETRI_TRANSITIONS=106} [2022-09-16 12:06:10,530 INFO L287 CegarLoopForPetriNet]: 114 programPoint places, 8 predicate places. [2022-09-16 12:06:10,530 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 106 transitions, 376 flow [2022-09-16 12:06:10,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:10,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:10,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:10,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-09-16 12:06:10,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:10,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:10,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1077765401, now seen corresponding path program 1 times [2022-09-16 12:06:10,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:10,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254188138] [2022-09-16 12:06:10,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:10,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:10,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:10,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254188138] [2022-09-16 12:06:10,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254188138] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:10,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731807936] [2022-09-16 12:06:10,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:10,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:10,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:10,555 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:10,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-09-16 12:06:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:10,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 12:06:10,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:10,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 12:06:10,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731807936] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:10,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 12:06:10,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 12:06:10,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967619414] [2022-09-16 12:06:10,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:10,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 12:06:10,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:10,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 12:06:10,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 12:06:10,666 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 115 [2022-09-16 12:06:10,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 106 transitions, 376 flow. Second operand has 6 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:10,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:10,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 115 [2022-09-16 12:06:10,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:11,135 INFO L130 PetriNetUnfolder]: 776/3761 cut-off events. [2022-09-16 12:06:11,135 INFO L131 PetriNetUnfolder]: For 3231/3231 co-relation queries the response was YES. [2022-09-16 12:06:11,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6029 conditions, 3761 events. 776/3761 cut-off events. For 3231/3231 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 28225 event pairs, 522 based on Foata normal form. 7/3258 useless extension candidates. Maximal degree in co-relation 3074. Up to 1063 conditions per place. [2022-09-16 12:06:11,158 INFO L137 encePairwiseOnDemand]: 110/115 looper letters, 27 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2022-09-16 12:06:11,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 108 transitions, 444 flow [2022-09-16 12:06:11,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 12:06:11,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 12:06:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2022-09-16 12:06:11,160 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7639751552795031 [2022-09-16 12:06:11,160 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2022-09-16 12:06:11,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2022-09-16 12:06:11,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:11,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2022-09-16 12:06:11,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 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) [2022-09-16 12:06:11,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 115.0) internal successors, (920), 8 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:11,161 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 115.0) internal successors, (920), 8 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:11,162 INFO L175 Difference]: Start difference. First operand has 122 places, 106 transitions, 376 flow. Second operand 7 states and 615 transitions. [2022-09-16 12:06:11,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 108 transitions, 444 flow [2022-09-16 12:06:11,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 108 transitions, 432 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:06:11,165 INFO L231 Difference]: Finished difference. Result has 124 places, 105 transitions, 372 flow [2022-09-16 12:06:11,165 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=372, PETRI_PLACES=124, PETRI_TRANSITIONS=105} [2022-09-16 12:06:11,165 INFO L287 CegarLoopForPetriNet]: 114 programPoint places, 10 predicate places. [2022-09-16 12:06:11,166 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 105 transitions, 372 flow [2022-09-16 12:06:11,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:11,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:11,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:11,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-09-16 12:06:11,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:11,383 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:11,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:11,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2015913916, now seen corresponding path program 1 times [2022-09-16 12:06:11,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:11,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259146599] [2022-09-16 12:06:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:11,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:11,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:11,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259146599] [2022-09-16 12:06:11,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259146599] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:11,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648563323] [2022-09-16 12:06:11,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:11,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:11,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:11,424 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:11,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-09-16 12:06:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:11,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:06:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:11,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:06:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:11,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648563323] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:06:11,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:06:11,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-16 12:06:11,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305518362] [2022-09-16 12:06:11,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:06:11,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 12:06:11,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:11,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 12:06:11,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-16 12:06:11,577 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 115 [2022-09-16 12:06:11,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 105 transitions, 372 flow. Second operand has 10 states, 10 states have (on average 86.0) internal successors, (860), 10 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:11,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:11,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 115 [2022-09-16 12:06:11,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:12,081 INFO L130 PetriNetUnfolder]: 774/3755 cut-off events. [2022-09-16 12:06:12,082 INFO L131 PetriNetUnfolder]: For 3241/3241 co-relation queries the response was YES. [2022-09-16 12:06:12,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6013 conditions, 3755 events. 774/3755 cut-off events. For 3241/3241 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 28589 event pairs, 526 based on Foata normal form. 2/3247 useless extension candidates. Maximal degree in co-relation 3074. Up to 1044 conditions per place. [2022-09-16 12:06:12,102 INFO L137 encePairwiseOnDemand]: 109/115 looper letters, 32 selfloop transitions, 9 changer transitions 0/116 dead transitions. [2022-09-16 12:06:12,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 116 transitions, 492 flow [2022-09-16 12:06:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-16 12:06:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-16 12:06:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 790 transitions. [2022-09-16 12:06:12,103 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7632850241545893 [2022-09-16 12:06:12,103 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 790 transitions. [2022-09-16 12:06:12,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 790 transitions. [2022-09-16 12:06:12,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:12,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 790 transitions. [2022-09-16 12:06:12,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 87.77777777777777) internal successors, (790), 9 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:12,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 115.0) internal successors, (1150), 10 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:12,121 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 115.0) internal successors, (1150), 10 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:12,121 INFO L175 Difference]: Start difference. First operand has 124 places, 105 transitions, 372 flow. Second operand 9 states and 790 transitions. [2022-09-16 12:06:12,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 116 transitions, 492 flow [2022-09-16 12:06:12,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 116 transitions, 479 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-09-16 12:06:12,124 INFO L231 Difference]: Finished difference. Result has 131 places, 109 transitions, 419 flow [2022-09-16 12:06:12,124 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=419, PETRI_PLACES=131, PETRI_TRANSITIONS=109} [2022-09-16 12:06:12,124 INFO L287 CegarLoopForPetriNet]: 114 programPoint places, 17 predicate places. [2022-09-16 12:06:12,124 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 109 transitions, 419 flow [2022-09-16 12:06:12,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 86.0) internal successors, (860), 10 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:12,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:12,124 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:12,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-09-16 12:06:12,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-09-16 12:06:12,342 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:12,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:12,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1464170173, now seen corresponding path program 1 times [2022-09-16 12:06:12,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:12,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114946819] [2022-09-16 12:06:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:12,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-09-16 12:06:12,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:12,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114946819] [2022-09-16 12:06:12,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114946819] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:12,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:12,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:12,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373074912] [2022-09-16 12:06:12,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:12,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:12,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:12,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:12,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:12,370 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 115 [2022-09-16 12:06:12,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 109 transitions, 419 flow. Second operand has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:12,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:12,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 115 [2022-09-16 12:06:12,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:12,894 INFO L130 PetriNetUnfolder]: 794/3924 cut-off events. [2022-09-16 12:06:12,894 INFO L131 PetriNetUnfolder]: For 1292/1292 co-relation queries the response was YES. [2022-09-16 12:06:12,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8640 conditions, 3924 events. 794/3924 cut-off events. For 1292/1292 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 30439 event pairs, 304 based on Foata normal form. 0/3430 useless extension candidates. Maximal degree in co-relation 4358. Up to 3298 conditions per place. [2022-09-16 12:06:12,931 INFO L137 encePairwiseOnDemand]: 109/115 looper letters, 38 selfloop transitions, 4 changer transitions 0/124 dead transitions. [2022-09-16 12:06:12,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 124 transitions, 557 flow [2022-09-16 12:06:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 459 transitions. [2022-09-16 12:06:12,933 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7982608695652174 [2022-09-16 12:06:12,933 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 459 transitions. [2022-09-16 12:06:12,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 459 transitions. [2022-09-16 12:06:12,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:12,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 459 transitions. [2022-09-16 12:06:12,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.8) internal successors, (459), 5 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) [2022-09-16 12:06:12,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:12,935 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:12,935 INFO L175 Difference]: Start difference. First operand has 131 places, 109 transitions, 419 flow. Second operand 5 states and 459 transitions. [2022-09-16 12:06:12,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 124 transitions, 557 flow [2022-09-16 12:06:12,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 124 transitions, 543 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-09-16 12:06:12,939 INFO L231 Difference]: Finished difference. Result has 134 places, 112 transitions, 435 flow [2022-09-16 12:06:12,939 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=435, PETRI_PLACES=134, PETRI_TRANSITIONS=112} [2022-09-16 12:06:12,940 INFO L287 CegarLoopForPetriNet]: 114 programPoint places, 20 predicate places. [2022-09-16 12:06:12,940 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 112 transitions, 435 flow [2022-09-16 12:06:12,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:12,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:12,940 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:12,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-09-16 12:06:12,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:12,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1216734982, now seen corresponding path program 1 times [2022-09-16 12:06:12,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:12,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835888961] [2022-09-16 12:06:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:12,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-09-16 12:06:12,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:12,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835888961] [2022-09-16 12:06:12,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835888961] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:12,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:12,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:12,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753833087] [2022-09-16 12:06:12,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:12,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:12,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:12,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:12,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:12,967 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 115 [2022-09-16 12:06:12,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 112 transitions, 435 flow. Second operand has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:12,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:12,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 115 [2022-09-16 12:06:12,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:13,427 INFO L130 PetriNetUnfolder]: 794/3677 cut-off events. [2022-09-16 12:06:13,427 INFO L131 PetriNetUnfolder]: For 1669/1669 co-relation queries the response was YES. [2022-09-16 12:06:13,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9329 conditions, 3677 events. 794/3677 cut-off events. For 1669/1669 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 27345 event pairs, 551 based on Foata normal form. 247/3924 useless extension candidates. Maximal degree in co-relation 4755. Up to 1577 conditions per place. [2022-09-16 12:06:13,451 INFO L137 encePairwiseOnDemand]: 109/115 looper letters, 22 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2022-09-16 12:06:13,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 112 transitions, 493 flow [2022-09-16 12:06:13,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 443 transitions. [2022-09-16 12:06:13,452 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7704347826086957 [2022-09-16 12:06:13,452 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 443 transitions. [2022-09-16 12:06:13,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 443 transitions. [2022-09-16 12:06:13,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:13,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 443 transitions. [2022-09-16 12:06:13,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:13,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:13,453 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:13,453 INFO L175 Difference]: Start difference. First operand has 134 places, 112 transitions, 435 flow. Second operand 5 states and 443 transitions. [2022-09-16 12:06:13,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 112 transitions, 493 flow [2022-09-16 12:06:13,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 112 transitions, 491 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:06:13,458 INFO L231 Difference]: Finished difference. Result has 137 places, 112 transitions, 453 flow [2022-09-16 12:06:13,458 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=137, PETRI_TRANSITIONS=112} [2022-09-16 12:06:13,458 INFO L287 CegarLoopForPetriNet]: 114 programPoint places, 23 predicate places. [2022-09-16 12:06:13,458 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 112 transitions, 453 flow [2022-09-16 12:06:13,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:13,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:13,458 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:13,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-09-16 12:06:13,459 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:13,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:13,459 INFO L85 PathProgramCache]: Analyzing trace with hash 599217940, now seen corresponding path program 1 times [2022-09-16 12:06:13,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:13,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198613730] [2022-09-16 12:06:13,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:13,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:13,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:13,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198613730] [2022-09-16 12:06:13,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198613730] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:13,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662249687] [2022-09-16 12:06:13,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:13,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:13,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:13,506 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:13,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-09-16 12:06:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:13,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-16 12:06:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:13,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:06:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:13,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662249687] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:06:13,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:06:13,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-09-16 12:06:13,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442704182] [2022-09-16 12:06:13,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:06:13,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-16 12:06:13,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:13,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-16 12:06:13,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-09-16 12:06:13,719 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 115 [2022-09-16 12:06:13,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 112 transitions, 453 flow. Second operand has 18 states, 18 states have (on average 86.5) internal successors, (1557), 18 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:13,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:13,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 115 [2022-09-16 12:06:13,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:14,257 INFO L130 PetriNetUnfolder]: 776/3531 cut-off events. [2022-09-16 12:06:14,257 INFO L131 PetriNetUnfolder]: For 4137/4137 co-relation queries the response was YES. [2022-09-16 12:06:14,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8196 conditions, 3531 events. 776/3531 cut-off events. For 4137/4137 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 28628 event pairs, 649 based on Foata normal form. 4/3535 useless extension candidates. Maximal degree in co-relation 4222. Up to 1039 conditions per place. [2022-09-16 12:06:14,286 INFO L137 encePairwiseOnDemand]: 109/115 looper letters, 48 selfloop transitions, 21 changer transitions 0/147 dead transitions. [2022-09-16 12:06:14,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 147 transitions, 753 flow [2022-09-16 12:06:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-16 12:06:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-16 12:06:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1816 transitions. [2022-09-16 12:06:14,288 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7519668737060041 [2022-09-16 12:06:14,288 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1816 transitions. [2022-09-16 12:06:14,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1816 transitions. [2022-09-16 12:06:14,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:14,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1816 transitions. [2022-09-16 12:06:14,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 86.47619047619048) internal successors, (1816), 21 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:14,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 115.0) internal successors, (2530), 22 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:14,293 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 115.0) internal successors, (2530), 22 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:14,293 INFO L175 Difference]: Start difference. First operand has 137 places, 112 transitions, 453 flow. Second operand 21 states and 1816 transitions. [2022-09-16 12:06:14,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 147 transitions, 753 flow [2022-09-16 12:06:14,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 147 transitions, 741 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:06:14,303 INFO L231 Difference]: Finished difference. Result has 159 places, 125 transitions, 605 flow [2022-09-16 12:06:14,304 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=605, PETRI_PLACES=159, PETRI_TRANSITIONS=125} [2022-09-16 12:06:14,304 INFO L287 CegarLoopForPetriNet]: 114 programPoint places, 45 predicate places. [2022-09-16 12:06:14,304 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 125 transitions, 605 flow [2022-09-16 12:06:14,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 86.5) internal successors, (1557), 18 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:14,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:14,305 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:14,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-09-16 12:06:14,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-09-16 12:06:14,521 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:14,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:14,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2017493137, now seen corresponding path program 1 times [2022-09-16 12:06:14,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:14,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913552212] [2022-09-16 12:06:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:14,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:06:14,549 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-16 12:06:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:06:14,567 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-16 12:06:14,567 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-16 12:06:14,567 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-09-16 12:06:14,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2022-09-16 12:06:14,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2022-09-16 12:06:14,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 5 remaining) [2022-09-16 12:06:14,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 5 remaining) [2022-09-16 12:06:14,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-09-16 12:06:14,568 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:14,569 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-16 12:06:14,569 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-09-16 12:06:14,593 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-09-16 12:06:14,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 122 transitions, 388 flow [2022-09-16 12:06:15,656 INFO L130 PetriNetUnfolder]: 2334/11778 cut-off events. [2022-09-16 12:06:15,656 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-09-16 12:06:15,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14155 conditions, 11778 events. 2334/11778 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 115941 event pairs, 1291 based on Foata normal form. 0/9684 useless extension candidates. Maximal degree in co-relation 6938. Up to 2304 conditions per place. [2022-09-16 12:06:15,779 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 122 transitions, 388 flow [2022-09-16 12:06:15,805 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 114 transitions, 372 flow [2022-09-16 12:06:15,806 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 12:06:15,806 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=false, 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;@5ea4da82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 12:06:15,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-09-16 12:06:15,809 INFO L130 PetriNetUnfolder]: 2/40 cut-off events. [2022-09-16 12:06:15,809 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 12:06:15,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:15,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:15,810 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:15,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:15,810 INFO L85 PathProgramCache]: Analyzing trace with hash 421168510, now seen corresponding path program 1 times [2022-09-16 12:06:15,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:15,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766505097] [2022-09-16 12:06:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:15,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:15,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:15,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766505097] [2022-09-16 12:06:15,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766505097] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:15,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:15,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:15,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817005969] [2022-09-16 12:06:15,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:15,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:15,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:15,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:15,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:15,835 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 122 [2022-09-16 12:06:15,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 114 transitions, 372 flow. Second operand has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:15,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:15,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 122 [2022-09-16 12:06:15,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:16,739 INFO L130 PetriNetUnfolder]: 1801/7646 cut-off events. [2022-09-16 12:06:16,739 INFO L131 PetriNetUnfolder]: For 7068/7068 co-relation queries the response was YES. [2022-09-16 12:06:16,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12429 conditions, 7646 events. 1801/7646 cut-off events. For 7068/7068 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 67059 event pairs, 1291 based on Foata normal form. 9/6599 useless extension candidates. Maximal degree in co-relation 5981. Up to 2398 conditions per place. [2022-09-16 12:06:16,778 INFO L137 encePairwiseOnDemand]: 113/122 looper letters, 33 selfloop transitions, 4 changer transitions 1/118 dead transitions. [2022-09-16 12:06:16,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 118 transitions, 454 flow [2022-09-16 12:06:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:16,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 483 transitions. [2022-09-16 12:06:16,780 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7918032786885246 [2022-09-16 12:06:16,780 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 483 transitions. [2022-09-16 12:06:16,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 483 transitions. [2022-09-16 12:06:16,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:16,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 483 transitions. [2022-09-16 12:06:16,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:16,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:16,782 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:16,782 INFO L175 Difference]: Start difference. First operand has 122 places, 114 transitions, 372 flow. Second operand 5 states and 483 transitions. [2022-09-16 12:06:16,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 118 transitions, 454 flow [2022-09-16 12:06:16,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 118 transitions, 454 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-16 12:06:16,785 INFO L231 Difference]: Finished difference. Result has 128 places, 113 transitions, 396 flow [2022-09-16 12:06:16,785 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=396, PETRI_PLACES=128, PETRI_TRANSITIONS=113} [2022-09-16 12:06:16,786 INFO L287 CegarLoopForPetriNet]: 122 programPoint places, 6 predicate places. [2022-09-16 12:06:16,786 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 113 transitions, 396 flow [2022-09-16 12:06:16,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:16,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:16,786 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:16,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-09-16 12:06:16,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:16,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:16,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1935228074, now seen corresponding path program 1 times [2022-09-16 12:06:16,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:16,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530214643] [2022-09-16 12:06:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:16,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 12:06:16,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:16,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530214643] [2022-09-16 12:06:16,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530214643] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:16,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:16,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:16,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555126921] [2022-09-16 12:06:16,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:16,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:16,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:16,805 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 122 [2022-09-16 12:06:16,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 113 transitions, 396 flow. Second operand has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:16,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:16,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 122 [2022-09-16 12:06:16,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:17,663 INFO L130 PetriNetUnfolder]: 1801/7629 cut-off events. [2022-09-16 12:06:17,664 INFO L131 PetriNetUnfolder]: For 7083/7083 co-relation queries the response was YES. [2022-09-16 12:06:17,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12456 conditions, 7629 events. 1801/7629 cut-off events. For 7083/7083 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 66401 event pairs, 1291 based on Foata normal form. 8/6615 useless extension candidates. Maximal degree in co-relation 12390. Up to 2324 conditions per place. [2022-09-16 12:06:17,719 INFO L137 encePairwiseOnDemand]: 116/122 looper letters, 25 selfloop transitions, 8 changer transitions 0/113 dead transitions. [2022-09-16 12:06:17,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 113 transitions, 460 flow [2022-09-16 12:06:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:17,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 471 transitions. [2022-09-16 12:06:17,721 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7721311475409836 [2022-09-16 12:06:17,721 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 471 transitions. [2022-09-16 12:06:17,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 471 transitions. [2022-09-16 12:06:17,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:17,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 471 transitions. [2022-09-16 12:06:17,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.2) internal successors, (471), 5 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:17,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:17,722 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:17,722 INFO L175 Difference]: Start difference. First operand has 128 places, 113 transitions, 396 flow. Second operand 5 states and 471 transitions. [2022-09-16 12:06:17,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 113 transitions, 460 flow [2022-09-16 12:06:17,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 113 transitions, 458 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:06:17,726 INFO L231 Difference]: Finished difference. Result has 130 places, 113 transitions, 414 flow [2022-09-16 12:06:17,726 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=414, PETRI_PLACES=130, PETRI_TRANSITIONS=113} [2022-09-16 12:06:17,726 INFO L287 CegarLoopForPetriNet]: 122 programPoint places, 8 predicate places. [2022-09-16 12:06:17,726 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 113 transitions, 414 flow [2022-09-16 12:06:17,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:17,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:17,726 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:17,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-09-16 12:06:17,726 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:17,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:17,727 INFO L85 PathProgramCache]: Analyzing trace with hash 137472783, now seen corresponding path program 1 times [2022-09-16 12:06:17,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:17,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476042797] [2022-09-16 12:06:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:17,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:17,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:17,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476042797] [2022-09-16 12:06:17,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476042797] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:17,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070941002] [2022-09-16 12:06:17,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:17,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:17,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:17,756 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:17,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-09-16 12:06:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:17,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 12:06:17,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:17,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 12:06:17,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070941002] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:17,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 12:06:17,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 12:06:17,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633802427] [2022-09-16 12:06:17,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:17,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 12:06:17,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:17,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 12:06:17,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 12:06:17,985 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 122 [2022-09-16 12:06:17,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 113 transitions, 414 flow. Second operand has 6 states, 6 states have (on average 90.66666666666667) internal successors, (544), 6 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:17,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:17,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 122 [2022-09-16 12:06:17,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:19,070 INFO L130 PetriNetUnfolder]: 1801/7621 cut-off events. [2022-09-16 12:06:19,070 INFO L131 PetriNetUnfolder]: For 7120/7120 co-relation queries the response was YES. [2022-09-16 12:06:19,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12479 conditions, 7621 events. 1801/7621 cut-off events. For 7120/7120 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 66505 event pairs, 1291 based on Foata normal form. 8/6607 useless extension candidates. Maximal degree in co-relation 6472. Up to 2348 conditions per place. [2022-09-16 12:06:19,110 INFO L137 encePairwiseOnDemand]: 117/122 looper letters, 29 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2022-09-16 12:06:19,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 115 transitions, 486 flow [2022-09-16 12:06:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 12:06:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 12:06:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 652 transitions. [2022-09-16 12:06:19,111 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7634660421545667 [2022-09-16 12:06:19,111 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 652 transitions. [2022-09-16 12:06:19,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 652 transitions. [2022-09-16 12:06:19,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:19,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 652 transitions. [2022-09-16 12:06:19,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.14285714285714) internal successors, (652), 7 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:19,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 122.0) internal successors, (976), 8 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:19,113 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 122.0) internal successors, (976), 8 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:19,113 INFO L175 Difference]: Start difference. First operand has 130 places, 113 transitions, 414 flow. Second operand 7 states and 652 transitions. [2022-09-16 12:06:19,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 115 transitions, 486 flow [2022-09-16 12:06:19,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 115 transitions, 474 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:06:19,117 INFO L231 Difference]: Finished difference. Result has 132 places, 112 transitions, 410 flow [2022-09-16 12:06:19,117 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=410, PETRI_PLACES=132, PETRI_TRANSITIONS=112} [2022-09-16 12:06:19,118 INFO L287 CegarLoopForPetriNet]: 122 programPoint places, 10 predicate places. [2022-09-16 12:06:19,118 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 112 transitions, 410 flow [2022-09-16 12:06:19,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.66666666666667) internal successors, (544), 6 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:19,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:19,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:19,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-09-16 12:06:19,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:19,335 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:19,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:19,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1340297462, now seen corresponding path program 1 times [2022-09-16 12:06:19,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:19,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583115808] [2022-09-16 12:06:19,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:19,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:19,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:19,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583115808] [2022-09-16 12:06:19,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583115808] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:19,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353141963] [2022-09-16 12:06:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:19,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:19,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:19,373 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:19,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-09-16 12:06:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:19,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:06:19,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:19,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:06:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:19,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353141963] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:06:19,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:06:19,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-16 12:06:19,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225368745] [2022-09-16 12:06:19,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:06:19,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 12:06:19,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:19,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 12:06:19,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-16 12:06:19,531 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 122 [2022-09-16 12:06:19,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 112 transitions, 410 flow. Second operand has 10 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:19,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:19,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 122 [2022-09-16 12:06:19,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:20,680 INFO L130 PetriNetUnfolder]: 1799/7615 cut-off events. [2022-09-16 12:06:20,681 INFO L131 PetriNetUnfolder]: For 7131/7131 co-relation queries the response was YES. [2022-09-16 12:06:20,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12462 conditions, 7615 events. 1799/7615 cut-off events. For 7131/7131 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 66822 event pairs, 1295 based on Foata normal form. 2/6595 useless extension candidates. Maximal degree in co-relation 6472. Up to 2327 conditions per place. [2022-09-16 12:06:20,730 INFO L137 encePairwiseOnDemand]: 116/122 looper letters, 34 selfloop transitions, 9 changer transitions 0/123 dead transitions. [2022-09-16 12:06:20,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 123 transitions, 534 flow [2022-09-16 12:06:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-16 12:06:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-16 12:06:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 837 transitions. [2022-09-16 12:06:20,732 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7622950819672131 [2022-09-16 12:06:20,732 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 837 transitions. [2022-09-16 12:06:20,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 837 transitions. [2022-09-16 12:06:20,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:20,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 837 transitions. [2022-09-16 12:06:20,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 93.0) internal successors, (837), 9 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:20,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 122.0) internal successors, (1220), 10 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:20,735 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 122.0) internal successors, (1220), 10 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:20,735 INFO L175 Difference]: Start difference. First operand has 132 places, 112 transitions, 410 flow. Second operand 9 states and 837 transitions. [2022-09-16 12:06:20,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 123 transitions, 534 flow [2022-09-16 12:06:20,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 123 transitions, 521 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-09-16 12:06:20,739 INFO L231 Difference]: Finished difference. Result has 139 places, 116 transitions, 457 flow [2022-09-16 12:06:20,740 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=457, PETRI_PLACES=139, PETRI_TRANSITIONS=116} [2022-09-16 12:06:20,740 INFO L287 CegarLoopForPetriNet]: 122 programPoint places, 17 predicate places. [2022-09-16 12:06:20,740 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 116 transitions, 457 flow [2022-09-16 12:06:20,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:20,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:20,740 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:20,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-09-16 12:06:20,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:20,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:20,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:20,943 INFO L85 PathProgramCache]: Analyzing trace with hash 222820027, now seen corresponding path program 1 times [2022-09-16 12:06:20,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:20,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600131488] [2022-09-16 12:06:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:20,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-09-16 12:06:20,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:20,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600131488] [2022-09-16 12:06:20,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600131488] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:20,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:20,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:20,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839730280] [2022-09-16 12:06:20,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:20,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:20,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:20,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:20,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:20,974 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 122 [2022-09-16 12:06:20,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 116 transitions, 457 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:20,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:20,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 122 [2022-09-16 12:06:20,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:22,097 INFO L130 PetriNetUnfolder]: 1826/7840 cut-off events. [2022-09-16 12:06:22,097 INFO L131 PetriNetUnfolder]: For 2646/2646 co-relation queries the response was YES. [2022-09-16 12:06:22,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17505 conditions, 7840 events. 1826/7840 cut-off events. For 2646/2646 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 69568 event pairs, 826 based on Foata normal form. 0/6836 useless extension candidates. Maximal degree in co-relation 8889. Up to 6884 conditions per place. [2022-09-16 12:06:22,215 INFO L137 encePairwiseOnDemand]: 116/122 looper letters, 41 selfloop transitions, 4 changer transitions 0/132 dead transitions. [2022-09-16 12:06:22,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 132 transitions, 606 flow [2022-09-16 12:06:22,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:22,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:22,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 487 transitions. [2022-09-16 12:06:22,216 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7983606557377049 [2022-09-16 12:06:22,216 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 487 transitions. [2022-09-16 12:06:22,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 487 transitions. [2022-09-16 12:06:22,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:22,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 487 transitions. [2022-09-16 12:06:22,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.4) internal successors, (487), 5 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:22,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:22,218 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:22,218 INFO L175 Difference]: Start difference. First operand has 139 places, 116 transitions, 457 flow. Second operand 5 states and 487 transitions. [2022-09-16 12:06:22,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 132 transitions, 606 flow [2022-09-16 12:06:22,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 132 transitions, 592 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-09-16 12:06:22,221 INFO L231 Difference]: Finished difference. Result has 142 places, 119 transitions, 473 flow [2022-09-16 12:06:22,221 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=473, PETRI_PLACES=142, PETRI_TRANSITIONS=119} [2022-09-16 12:06:22,221 INFO L287 CegarLoopForPetriNet]: 122 programPoint places, 20 predicate places. [2022-09-16 12:06:22,221 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 119 transitions, 473 flow [2022-09-16 12:06:22,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:22,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:22,222 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:22,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-09-16 12:06:22,222 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:22,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:22,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1877934312, now seen corresponding path program 1 times [2022-09-16 12:06:22,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:22,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701818722] [2022-09-16 12:06:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:22,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-09-16 12:06:22,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:22,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701818722] [2022-09-16 12:06:22,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701818722] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:22,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:22,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:22,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499898886] [2022-09-16 12:06:22,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:22,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:22,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:22,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:22,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:22,261 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 122 [2022-09-16 12:06:22,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 119 transitions, 473 flow. Second operand has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:22,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:22,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 122 [2022-09-16 12:06:22,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:23,464 INFO L130 PetriNetUnfolder]: 1826/7338 cut-off events. [2022-09-16 12:06:23,465 INFO L131 PetriNetUnfolder]: For 3315/3315 co-relation queries the response was YES. [2022-09-16 12:06:23,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18758 conditions, 7338 events. 1826/7338 cut-off events. For 3315/3315 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 62295 event pairs, 1328 based on Foata normal form. 502/7840 useless extension candidates. Maximal degree in co-relation 9450. Up to 3380 conditions per place. [2022-09-16 12:06:23,528 INFO L137 encePairwiseOnDemand]: 116/122 looper letters, 24 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2022-09-16 12:06:23,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 119 transitions, 535 flow [2022-09-16 12:06:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 470 transitions. [2022-09-16 12:06:23,529 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7704918032786885 [2022-09-16 12:06:23,529 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 470 transitions. [2022-09-16 12:06:23,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 470 transitions. [2022-09-16 12:06:23,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:23,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 470 transitions. [2022-09-16 12:06:23,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:23,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:23,531 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:23,531 INFO L175 Difference]: Start difference. First operand has 142 places, 119 transitions, 473 flow. Second operand 5 states and 470 transitions. [2022-09-16 12:06:23,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 119 transitions, 535 flow [2022-09-16 12:06:23,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 119 transitions, 533 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:06:23,536 INFO L231 Difference]: Finished difference. Result has 145 places, 119 transitions, 491 flow [2022-09-16 12:06:23,537 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=491, PETRI_PLACES=145, PETRI_TRANSITIONS=119} [2022-09-16 12:06:23,537 INFO L287 CegarLoopForPetriNet]: 122 programPoint places, 23 predicate places. [2022-09-16 12:06:23,537 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 119 transitions, 491 flow [2022-09-16 12:06:23,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:23,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:23,537 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:23,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-09-16 12:06:23,537 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:23,538 INFO L85 PathProgramCache]: Analyzing trace with hash -941552608, now seen corresponding path program 1 times [2022-09-16 12:06:23,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:23,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973552830] [2022-09-16 12:06:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:23,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:23,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:23,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973552830] [2022-09-16 12:06:23,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973552830] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:23,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837852532] [2022-09-16 12:06:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:23,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:23,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:23,580 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:23,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-09-16 12:06:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:23,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-16 12:06:23,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:23,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:06:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:23,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837852532] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:06:23,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:06:23,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-09-16 12:06:23,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027632832] [2022-09-16 12:06:23,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:06:23,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-16 12:06:23,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:23,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-16 12:06:23,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-09-16 12:06:23,815 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 122 [2022-09-16 12:06:23,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 119 transitions, 491 flow. Second operand has 18 states, 18 states have (on average 91.5) internal successors, (1647), 18 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:23,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:23,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 122 [2022-09-16 12:06:23,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:24,928 INFO L130 PetriNetUnfolder]: 1808/7192 cut-off events. [2022-09-16 12:06:24,928 INFO L131 PetriNetUnfolder]: For 8879/8879 co-relation queries the response was YES. [2022-09-16 12:06:24,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16841 conditions, 7192 events. 1808/7192 cut-off events. For 8879/8879 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 64239 event pairs, 1426 based on Foata normal form. 4/7196 useless extension candidates. Maximal degree in co-relation 8661. Up to 2330 conditions per place. [2022-09-16 12:06:24,976 INFO L137 encePairwiseOnDemand]: 116/122 looper letters, 50 selfloop transitions, 21 changer transitions 0/154 dead transitions. [2022-09-16 12:06:24,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 154 transitions, 795 flow [2022-09-16 12:06:24,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-16 12:06:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-16 12:06:24,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1923 transitions. [2022-09-16 12:06:24,979 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7505854800936768 [2022-09-16 12:06:24,979 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1923 transitions. [2022-09-16 12:06:24,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1923 transitions. [2022-09-16 12:06:24,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:24,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1923 transitions. [2022-09-16 12:06:24,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 91.57142857142857) internal successors, (1923), 21 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:24,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 122.0) internal successors, (2684), 22 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:24,984 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 122.0) internal successors, (2684), 22 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:24,984 INFO L175 Difference]: Start difference. First operand has 145 places, 119 transitions, 491 flow. Second operand 21 states and 1923 transitions. [2022-09-16 12:06:24,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 154 transitions, 795 flow [2022-09-16 12:06:24,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 154 transitions, 783 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:06:24,998 INFO L231 Difference]: Finished difference. Result has 167 places, 132 transitions, 643 flow [2022-09-16 12:06:24,998 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=643, PETRI_PLACES=167, PETRI_TRANSITIONS=132} [2022-09-16 12:06:24,999 INFO L287 CegarLoopForPetriNet]: 122 programPoint places, 45 predicate places. [2022-09-16 12:06:24,999 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 132 transitions, 643 flow [2022-09-16 12:06:24,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 91.5) internal successors, (1647), 18 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:24,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:24,999 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:25,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-09-16 12:06:25,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-09-16 12:06:25,203 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash -423198697, now seen corresponding path program 1 times [2022-09-16 12:06:25,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:25,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882386745] [2022-09-16 12:06:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:25,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:06:25,224 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-16 12:06:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:06:25,255 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-16 12:06:25,255 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-16 12:06:25,255 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-09-16 12:06:25,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2022-09-16 12:06:25,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2022-09-16 12:06:25,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 5 remaining) [2022-09-16 12:06:25,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 5 remaining) [2022-09-16 12:06:25,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-09-16 12:06:25,256 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:25,256 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-16 12:06:25,256 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-09-16 12:06:25,280 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-09-16 12:06:25,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 129 transitions, 428 flow [2022-09-16 12:06:27,835 INFO L130 PetriNetUnfolder]: 5153/23836 cut-off events. [2022-09-16 12:06:27,835 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-09-16 12:06:27,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29042 conditions, 23836 events. 5153/23836 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 267755 event pairs, 3084 based on Foata normal form. 0/19689 useless extension candidates. Maximal degree in co-relation 14144. Up to 5120 conditions per place. [2022-09-16 12:06:27,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 129 transitions, 428 flow [2022-09-16 12:06:27,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 121 transitions, 412 flow [2022-09-16 12:06:27,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 12:06:27,961 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=false, 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;@5ea4da82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 12:06:27,961 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-09-16 12:06:27,962 INFO L130 PetriNetUnfolder]: 2/41 cut-off events. [2022-09-16 12:06:27,962 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 12:06:27,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:27,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:27,962 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:27,963 INFO L85 PathProgramCache]: Analyzing trace with hash -814044732, now seen corresponding path program 1 times [2022-09-16 12:06:27,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:27,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697931308] [2022-09-16 12:06:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:27,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:27,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:27,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697931308] [2022-09-16 12:06:27,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697931308] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:27,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:27,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:27,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729889292] [2022-09-16 12:06:27,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:27,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:27,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:27,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:27,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:27,981 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 129 [2022-09-16 12:06:27,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 121 transitions, 412 flow. Second operand has 4 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:27,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:27,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 129 [2022-09-16 12:06:27,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:29,998 INFO L130 PetriNetUnfolder]: 4106/15605 cut-off events. [2022-09-16 12:06:29,999 INFO L131 PetriNetUnfolder]: For 15570/15570 co-relation queries the response was YES. [2022-09-16 12:06:30,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26044 conditions, 15605 events. 4106/15605 cut-off events. For 15570/15570 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 154465 event pairs, 3084 based on Foata normal form. 10/13531 useless extension candidates. Maximal degree in co-relation 12427. Up to 5225 conditions per place. [2022-09-16 12:06:30,098 INFO L137 encePairwiseOnDemand]: 120/129 looper letters, 35 selfloop transitions, 4 changer transitions 1/125 dead transitions. [2022-09-16 12:06:30,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 125 transitions, 498 flow [2022-09-16 12:06:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 510 transitions. [2022-09-16 12:06:30,100 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7906976744186046 [2022-09-16 12:06:30,100 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 510 transitions. [2022-09-16 12:06:30,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 510 transitions. [2022-09-16 12:06:30,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:30,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 510 transitions. [2022-09-16 12:06:30,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:30,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:30,101 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:30,101 INFO L175 Difference]: Start difference. First operand has 130 places, 121 transitions, 412 flow. Second operand 5 states and 510 transitions. [2022-09-16 12:06:30,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 125 transitions, 498 flow [2022-09-16 12:06:30,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 125 transitions, 498 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-16 12:06:30,105 INFO L231 Difference]: Finished difference. Result has 136 places, 120 transitions, 436 flow [2022-09-16 12:06:30,106 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=136, PETRI_TRANSITIONS=120} [2022-09-16 12:06:30,106 INFO L287 CegarLoopForPetriNet]: 130 programPoint places, 6 predicate places. [2022-09-16 12:06:30,106 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 120 transitions, 436 flow [2022-09-16 12:06:30,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:30,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:30,106 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:30,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-09-16 12:06:30,106 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:30,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:30,106 INFO L85 PathProgramCache]: Analyzing trace with hash -214004511, now seen corresponding path program 1 times [2022-09-16 12:06:30,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:30,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309360645] [2022-09-16 12:06:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:30,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 12:06:30,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:30,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309360645] [2022-09-16 12:06:30,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309360645] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:30,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:30,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:30,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430517426] [2022-09-16 12:06:30,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:30,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:30,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:30,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:30,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:30,145 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 129 [2022-09-16 12:06:30,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 120 transitions, 436 flow. Second operand has 4 states, 4 states have (on average 96.75) internal successors, (387), 4 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:30,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:30,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 129 [2022-09-16 12:06:30,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:32,234 INFO L130 PetriNetUnfolder]: 4106/15586 cut-off events. [2022-09-16 12:06:32,234 INFO L131 PetriNetUnfolder]: For 15586/15586 co-relation queries the response was YES. [2022-09-16 12:06:32,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26073 conditions, 15586 events. 4106/15586 cut-off events. For 15586/15586 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 153427 event pairs, 3084 based on Foata normal form. 9/13549 useless extension candidates. Maximal degree in co-relation 26006. Up to 5142 conditions per place. [2022-09-16 12:06:32,356 INFO L137 encePairwiseOnDemand]: 123/129 looper letters, 27 selfloop transitions, 8 changer transitions 0/120 dead transitions. [2022-09-16 12:06:32,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 120 transitions, 504 flow [2022-09-16 12:06:32,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:32,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 498 transitions. [2022-09-16 12:06:32,357 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.772093023255814 [2022-09-16 12:06:32,357 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 498 transitions. [2022-09-16 12:06:32,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 498 transitions. [2022-09-16 12:06:32,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:32,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 498 transitions. [2022-09-16 12:06:32,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.6) internal successors, (498), 5 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:32,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:32,359 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:32,359 INFO L175 Difference]: Start difference. First operand has 136 places, 120 transitions, 436 flow. Second operand 5 states and 498 transitions. [2022-09-16 12:06:32,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 120 transitions, 504 flow [2022-09-16 12:06:32,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 120 transitions, 502 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:06:32,363 INFO L231 Difference]: Finished difference. Result has 138 places, 120 transitions, 454 flow [2022-09-16 12:06:32,363 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=454, PETRI_PLACES=138, PETRI_TRANSITIONS=120} [2022-09-16 12:06:32,363 INFO L287 CegarLoopForPetriNet]: 130 programPoint places, 8 predicate places. [2022-09-16 12:06:32,364 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 120 transitions, 454 flow [2022-09-16 12:06:32,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.75) internal successors, (387), 4 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:32,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:32,364 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:32,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-09-16 12:06:32,364 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:32,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1955795813, now seen corresponding path program 1 times [2022-09-16 12:06:32,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:32,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480690558] [2022-09-16 12:06:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:32,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:32,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:32,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480690558] [2022-09-16 12:06:32,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480690558] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:32,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039124026] [2022-09-16 12:06:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:32,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:32,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:32,487 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:32,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-09-16 12:06:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:32,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 12:06:32,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:32,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 12:06:32,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039124026] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:32,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 12:06:32,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 12:06:32,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237663872] [2022-09-16 12:06:32,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:32,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 12:06:32,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:32,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 12:06:32,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 12:06:32,607 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 129 [2022-09-16 12:06:32,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 120 transitions, 454 flow. Second operand has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:32,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:32,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 129 [2022-09-16 12:06:32,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:34,686 INFO L130 PetriNetUnfolder]: 4106/15577 cut-off events. [2022-09-16 12:06:34,687 INFO L131 PetriNetUnfolder]: For 15627/15627 co-relation queries the response was YES. [2022-09-16 12:06:34,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26098 conditions, 15577 events. 4106/15577 cut-off events. For 15627/15627 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 154448 event pairs, 3084 based on Foata normal form. 9/13540 useless extension candidates. Maximal degree in co-relation 13646. Up to 5169 conditions per place. [2022-09-16 12:06:34,810 INFO L137 encePairwiseOnDemand]: 124/129 looper letters, 31 selfloop transitions, 6 changer transitions 0/122 dead transitions. [2022-09-16 12:06:34,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 122 transitions, 530 flow [2022-09-16 12:06:34,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 12:06:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 12:06:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 689 transitions. [2022-09-16 12:06:34,812 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7630121816168328 [2022-09-16 12:06:34,812 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 689 transitions. [2022-09-16 12:06:34,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 689 transitions. [2022-09-16 12:06:34,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:34,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 689 transitions. [2022-09-16 12:06:34,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.42857142857143) internal successors, (689), 7 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:34,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:34,815 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:34,815 INFO L175 Difference]: Start difference. First operand has 138 places, 120 transitions, 454 flow. Second operand 7 states and 689 transitions. [2022-09-16 12:06:34,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 122 transitions, 530 flow [2022-09-16 12:06:34,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 122 transitions, 518 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:06:34,820 INFO L231 Difference]: Finished difference. Result has 140 places, 119 transitions, 450 flow [2022-09-16 12:06:34,820 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=450, PETRI_PLACES=140, PETRI_TRANSITIONS=119} [2022-09-16 12:06:34,820 INFO L287 CegarLoopForPetriNet]: 130 programPoint places, 10 predicate places. [2022-09-16 12:06:34,820 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 119 transitions, 450 flow [2022-09-16 12:06:34,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:34,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:34,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:34,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-09-16 12:06:35,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-09-16 12:06:35,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:35,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:35,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1688311804, now seen corresponding path program 1 times [2022-09-16 12:06:35,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:35,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420872992] [2022-09-16 12:06:35,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:35,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:35,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:35,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420872992] [2022-09-16 12:06:35,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420872992] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:35,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529516759] [2022-09-16 12:06:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:35,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:35,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:35,076 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:35,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-09-16 12:06:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:35,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:06:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:35,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:06:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:35,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529516759] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:06:35,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:06:35,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-16 12:06:35,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965451953] [2022-09-16 12:06:35,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:06:35,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 12:06:35,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:35,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 12:06:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-16 12:06:35,238 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 129 [2022-09-16 12:06:35,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 119 transitions, 450 flow. Second operand has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:35,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:35,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 129 [2022-09-16 12:06:35,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:37,299 INFO L130 PetriNetUnfolder]: 4104/15571 cut-off events. [2022-09-16 12:06:37,299 INFO L131 PetriNetUnfolder]: For 15639/15639 co-relation queries the response was YES. [2022-09-16 12:06:37,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26080 conditions, 15571 events. 4104/15571 cut-off events. For 15639/15639 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 154356 event pairs, 3088 based on Foata normal form. 2/13527 useless extension candidates. Maximal degree in co-relation 13646. Up to 5146 conditions per place. [2022-09-16 12:06:37,410 INFO L137 encePairwiseOnDemand]: 123/129 looper letters, 36 selfloop transitions, 9 changer transitions 0/130 dead transitions. [2022-09-16 12:06:37,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 130 transitions, 578 flow [2022-09-16 12:06:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-16 12:06:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-16 12:06:37,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 884 transitions. [2022-09-16 12:06:37,412 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7614125753660638 [2022-09-16 12:06:37,412 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 884 transitions. [2022-09-16 12:06:37,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 884 transitions. [2022-09-16 12:06:37,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:37,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 884 transitions. [2022-09-16 12:06:37,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 98.22222222222223) internal successors, (884), 9 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:37,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:37,414 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:37,414 INFO L175 Difference]: Start difference. First operand has 140 places, 119 transitions, 450 flow. Second operand 9 states and 884 transitions. [2022-09-16 12:06:37,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 130 transitions, 578 flow [2022-09-16 12:06:37,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 130 transitions, 565 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-09-16 12:06:37,417 INFO L231 Difference]: Finished difference. Result has 147 places, 123 transitions, 497 flow [2022-09-16 12:06:37,418 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=497, PETRI_PLACES=147, PETRI_TRANSITIONS=123} [2022-09-16 12:06:37,418 INFO L287 CegarLoopForPetriNet]: 130 programPoint places, 17 predicate places. [2022-09-16 12:06:37,418 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 123 transitions, 497 flow [2022-09-16 12:06:37,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:37,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:37,418 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:37,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-09-16 12:06:37,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:37,619 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:37,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:37,619 INFO L85 PathProgramCache]: Analyzing trace with hash 435492247, now seen corresponding path program 1 times [2022-09-16 12:06:37,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:37,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649405758] [2022-09-16 12:06:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:37,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-09-16 12:06:37,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:37,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649405758] [2022-09-16 12:06:37,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649405758] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:37,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:37,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:37,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033792518] [2022-09-16 12:06:37,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:37,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:37,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:37,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:37,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:37,725 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 129 [2022-09-16 12:06:37,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 123 transitions, 497 flow. Second operand has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:37,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:37,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 129 [2022-09-16 12:06:37,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:40,156 INFO L130 PetriNetUnfolder]: 4139/15859 cut-off events. [2022-09-16 12:06:40,157 INFO L131 PetriNetUnfolder]: For 5548/5548 co-relation queries the response was YES. [2022-09-16 12:06:40,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35857 conditions, 15859 events. 4139/15859 cut-off events. For 5548/5548 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 158207 event pairs, 2117 based on Foata normal form. 0/13833 useless extension candidates. Maximal degree in co-relation 18381. Up to 14311 conditions per place. [2022-09-16 12:06:40,264 INFO L137 encePairwiseOnDemand]: 123/129 looper letters, 44 selfloop transitions, 4 changer transitions 0/140 dead transitions. [2022-09-16 12:06:40,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 140 transitions, 657 flow [2022-09-16 12:06:40,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 515 transitions. [2022-09-16 12:06:40,265 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7984496124031008 [2022-09-16 12:06:40,265 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 515 transitions. [2022-09-16 12:06:40,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 515 transitions. [2022-09-16 12:06:40,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:40,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 515 transitions. [2022-09-16 12:06:40,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:40,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:40,266 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:40,266 INFO L175 Difference]: Start difference. First operand has 147 places, 123 transitions, 497 flow. Second operand 5 states and 515 transitions. [2022-09-16 12:06:40,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 140 transitions, 657 flow [2022-09-16 12:06:40,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 140 transitions, 643 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-09-16 12:06:40,270 INFO L231 Difference]: Finished difference. Result has 150 places, 126 transitions, 513 flow [2022-09-16 12:06:40,270 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=513, PETRI_PLACES=150, PETRI_TRANSITIONS=126} [2022-09-16 12:06:40,271 INFO L287 CegarLoopForPetriNet]: 130 programPoint places, 20 predicate places. [2022-09-16 12:06:40,271 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 126 transitions, 513 flow [2022-09-16 12:06:40,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:40,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:40,271 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:40,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-09-16 12:06:40,271 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:40,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:40,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1857705016, now seen corresponding path program 1 times [2022-09-16 12:06:40,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:40,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090456888] [2022-09-16 12:06:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:40,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-09-16 12:06:40,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:40,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090456888] [2022-09-16 12:06:40,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090456888] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:40,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:40,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:40,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872964318] [2022-09-16 12:06:40,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:40,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:40,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:40,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:40,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:40,292 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 129 [2022-09-16 12:06:40,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 126 transitions, 513 flow. Second operand has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:40,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:40,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 129 [2022-09-16 12:06:40,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:42,807 INFO L130 PetriNetUnfolder]: 4139/14846 cut-off events. [2022-09-16 12:06:42,807 INFO L131 PetriNetUnfolder]: For 6769/6769 co-relation queries the response was YES. [2022-09-16 12:06:42,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38192 conditions, 14846 events. 4139/14846 cut-off events. For 6769/6769 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 141565 event pairs, 3130 based on Foata normal form. 1013/15859 useless extension candidates. Maximal degree in co-relation 19460. Up to 7232 conditions per place. [2022-09-16 12:06:42,907 INFO L137 encePairwiseOnDemand]: 123/129 looper letters, 26 selfloop transitions, 8 changer transitions 0/126 dead transitions. [2022-09-16 12:06:42,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 126 transitions, 579 flow [2022-09-16 12:06:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 497 transitions. [2022-09-16 12:06:42,908 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7705426356589147 [2022-09-16 12:06:42,908 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 497 transitions. [2022-09-16 12:06:42,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 497 transitions. [2022-09-16 12:06:42,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:42,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 497 transitions. [2022-09-16 12:06:42,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.4) internal successors, (497), 5 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:42,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:42,909 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:42,909 INFO L175 Difference]: Start difference. First operand has 150 places, 126 transitions, 513 flow. Second operand 5 states and 497 transitions. [2022-09-16 12:06:42,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 126 transitions, 579 flow [2022-09-16 12:06:42,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 126 transitions, 577 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:06:42,919 INFO L231 Difference]: Finished difference. Result has 153 places, 126 transitions, 531 flow [2022-09-16 12:06:42,919 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=531, PETRI_PLACES=153, PETRI_TRANSITIONS=126} [2022-09-16 12:06:42,920 INFO L287 CegarLoopForPetriNet]: 130 programPoint places, 23 predicate places. [2022-09-16 12:06:42,920 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 126 transitions, 531 flow [2022-09-16 12:06:42,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:42,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:42,920 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:42,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-09-16 12:06:42,920 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:42,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1926000023, now seen corresponding path program 1 times [2022-09-16 12:06:42,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:42,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875011098] [2022-09-16 12:06:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:42,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:42,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:42,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875011098] [2022-09-16 12:06:42,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875011098] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:42,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565465789] [2022-09-16 12:06:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:42,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:42,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:42,975 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:42,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-09-16 12:06:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:43,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-16 12:06:43,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:43,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:06:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:43,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565465789] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:06:43,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:06:43,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-09-16 12:06:43,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327184665] [2022-09-16 12:06:43,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:06:43,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-16 12:06:43,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:43,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-16 12:06:43,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-09-16 12:06:43,209 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 129 [2022-09-16 12:06:43,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 126 transitions, 531 flow. Second operand has 18 states, 18 states have (on average 96.5) internal successors, (1737), 18 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:43,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:43,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 129 [2022-09-16 12:06:43,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:45,532 INFO L130 PetriNetUnfolder]: 4121/14700 cut-off events. [2022-09-16 12:06:45,533 INFO L131 PetriNetUnfolder]: For 19016/19016 co-relation queries the response was YES. [2022-09-16 12:06:45,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34720 conditions, 14700 events. 4121/14700 cut-off events. For 19016/19016 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 144267 event pairs, 3228 based on Foata normal form. 4/14704 useless extension candidates. Maximal degree in co-relation 17900. Up to 5158 conditions per place. [2022-09-16 12:06:45,660 INFO L137 encePairwiseOnDemand]: 123/129 looper letters, 52 selfloop transitions, 21 changer transitions 0/161 dead transitions. [2022-09-16 12:06:45,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 161 transitions, 839 flow [2022-09-16 12:06:45,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-16 12:06:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-16 12:06:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2030 transitions. [2022-09-16 12:06:45,663 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7493540051679587 [2022-09-16 12:06:45,663 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2030 transitions. [2022-09-16 12:06:45,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2030 transitions. [2022-09-16 12:06:45,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:45,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2030 transitions. [2022-09-16 12:06:45,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 96.66666666666667) internal successors, (2030), 21 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:45,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 129.0) internal successors, (2838), 22 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:45,787 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 129.0) internal successors, (2838), 22 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:45,787 INFO L175 Difference]: Start difference. First operand has 153 places, 126 transitions, 531 flow. Second operand 21 states and 2030 transitions. [2022-09-16 12:06:45,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 161 transitions, 839 flow [2022-09-16 12:06:45,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 161 transitions, 827 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:06:45,804 INFO L231 Difference]: Finished difference. Result has 175 places, 139 transitions, 683 flow [2022-09-16 12:06:45,804 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=683, PETRI_PLACES=175, PETRI_TRANSITIONS=139} [2022-09-16 12:06:45,805 INFO L287 CegarLoopForPetriNet]: 130 programPoint places, 45 predicate places. [2022-09-16 12:06:45,805 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 139 transitions, 683 flow [2022-09-16 12:06:45,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 96.5) internal successors, (1737), 18 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:45,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:45,805 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:45,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-09-16 12:06:46,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:46,007 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:46,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2147122103, now seen corresponding path program 1 times [2022-09-16 12:06:46,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:46,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531219564] [2022-09-16 12:06:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:46,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:46,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:46,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531219564] [2022-09-16 12:06:46,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531219564] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:06:46,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084030714] [2022-09-16 12:06:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:46,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:46,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:06:46,140 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:06:46,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-09-16 12:06:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:46,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 16 conjunts are in the unsatisfiable core [2022-09-16 12:06:46,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:06:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:46,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:06:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:06:46,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084030714] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:06:46,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:06:46,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-09-16 12:06:46,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643632191] [2022-09-16 12:06:46,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:06:46,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-16 12:06:46,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:46,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-16 12:06:46,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-09-16 12:06:46,634 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 129 [2022-09-16 12:06:46,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 139 transitions, 683 flow. Second operand has 34 states, 34 states have (on average 96.73529411764706) internal successors, (3289), 34 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:46,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:46,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 129 [2022-09-16 12:06:46,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:46,966 INFO L130 PetriNetUnfolder]: 0/195 cut-off events. [2022-09-16 12:06:46,966 INFO L131 PetriNetUnfolder]: For 497/497 co-relation queries the response was YES. [2022-09-16 12:06:46,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 195 events. 0/195 cut-off events. For 497/497 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 100 event pairs, 0 based on Foata normal form. 4/199 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-09-16 12:06:46,967 INFO L137 encePairwiseOnDemand]: 124/129 looper letters, 53 selfloop transitions, 31 changer transitions 0/157 dead transitions. [2022-09-16 12:06:46,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 157 transitions, 943 flow [2022-09-16 12:06:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-09-16 12:06:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-09-16 12:06:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3157 transitions. [2022-09-16 12:06:46,970 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7416020671834626 [2022-09-16 12:06:46,970 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3157 transitions. [2022-09-16 12:06:46,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3157 transitions. [2022-09-16 12:06:46,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:46,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3157 transitions. [2022-09-16 12:06:46,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 95.66666666666667) internal successors, (3157), 33 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:46,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 129.0) internal successors, (4386), 34 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:46,978 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 129.0) internal successors, (4386), 34 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:46,978 INFO L175 Difference]: Start difference. First operand has 175 places, 139 transitions, 683 flow. Second operand 33 states and 3157 transitions. [2022-09-16 12:06:46,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 157 transitions, 943 flow [2022-09-16 12:06:46,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 157 transitions, 755 flow, removed 69 selfloop flow, removed 14 redundant places. [2022-09-16 12:06:46,983 INFO L231 Difference]: Finished difference. Result has 177 places, 122 transitions, 530 flow [2022-09-16 12:06:46,983 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=530, PETRI_PLACES=177, PETRI_TRANSITIONS=122} [2022-09-16 12:06:46,983 INFO L287 CegarLoopForPetriNet]: 130 programPoint places, 47 predicate places. [2022-09-16 12:06:46,983 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 122 transitions, 530 flow [2022-09-16 12:06:46,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 96.73529411764706) internal successors, (3289), 34 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:46,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:46,984 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:47,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-09-16 12:06:47,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:06:47,191 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:47,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash 477094703, now seen corresponding path program 1 times [2022-09-16 12:06:47,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:47,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676489278] [2022-09-16 12:06:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:47,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:06:47,207 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-16 12:06:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:06:47,248 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-16 12:06:47,249 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-16 12:06:47,249 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-09-16 12:06:47,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2022-09-16 12:06:47,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2022-09-16 12:06:47,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 5 remaining) [2022-09-16 12:06:47,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 5 remaining) [2022-09-16 12:06:47,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-09-16 12:06:47,249 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:47,250 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-16 12:06:47,250 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-09-16 12:06:47,267 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-09-16 12:06:47,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 136 transitions, 470 flow [2022-09-16 12:06:52,857 INFO L130 PetriNetUnfolder]: 11300/48438 cut-off events. [2022-09-16 12:06:52,858 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2022-09-16 12:06:53,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59802 conditions, 48438 events. 11300/48438 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 606926 event pairs, 7181 based on Foata normal form. 0/40190 useless extension candidates. Maximal degree in co-relation 29031. Up to 11264 conditions per place. [2022-09-16 12:06:53,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 136 transitions, 470 flow [2022-09-16 12:06:53,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 128 transitions, 454 flow [2022-09-16 12:06:53,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 12:06:53,429 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=false, 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;@5ea4da82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 12:06:53,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-09-16 12:06:53,431 INFO L130 PetriNetUnfolder]: 2/41 cut-off events. [2022-09-16 12:06:53,431 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 12:06:53,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:53,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:53,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:53,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:53,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1617120815, now seen corresponding path program 1 times [2022-09-16 12:06:53,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:53,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431938336] [2022-09-16 12:06:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:53,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:06:53,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:53,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431938336] [2022-09-16 12:06:53,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431938336] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:53,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:53,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:53,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631476501] [2022-09-16 12:06:53,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:53,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:53,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:53,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:53,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:53,447 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 136 [2022-09-16 12:06:53,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 128 transitions, 454 flow. Second operand has 4 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:53,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:53,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 136 [2022-09-16 12:06:53,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:06:57,536 INFO L130 PetriNetUnfolder]: 9227/32012 cut-off events. [2022-09-16 12:06:57,537 INFO L131 PetriNetUnfolder]: For 34067/34067 co-relation queries the response was YES. [2022-09-16 12:06:57,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54764 conditions, 32012 events. 9227/32012 cut-off events. For 34067/34067 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 349570 event pairs, 7181 based on Foata normal form. 11/27887 useless extension candidates. Maximal degree in co-relation 26042. Up to 11380 conditions per place. [2022-09-16 12:06:57,902 INFO L137 encePairwiseOnDemand]: 127/136 looper letters, 37 selfloop transitions, 4 changer transitions 1/132 dead transitions. [2022-09-16 12:06:57,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 132 transitions, 544 flow [2022-09-16 12:06:57,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:06:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:06:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 537 transitions. [2022-09-16 12:06:57,903 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7897058823529411 [2022-09-16 12:06:57,903 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 537 transitions. [2022-09-16 12:06:57,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 537 transitions. [2022-09-16 12:06:57,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:06:57,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 537 transitions. [2022-09-16 12:06:57,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:57,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:57,905 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:57,905 INFO L175 Difference]: Start difference. First operand has 138 places, 128 transitions, 454 flow. Second operand 5 states and 537 transitions. [2022-09-16 12:06:57,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 132 transitions, 544 flow [2022-09-16 12:06:57,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 132 transitions, 544 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-16 12:06:57,926 INFO L231 Difference]: Finished difference. Result has 144 places, 127 transitions, 478 flow [2022-09-16 12:06:57,926 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=478, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2022-09-16 12:06:57,926 INFO L287 CegarLoopForPetriNet]: 138 programPoint places, 6 predicate places. [2022-09-16 12:06:57,926 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 478 flow [2022-09-16 12:06:57,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:57,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:06:57,927 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:06:57,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-09-16 12:06:57,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:06:57,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:06:57,927 INFO L85 PathProgramCache]: Analyzing trace with hash -897645325, now seen corresponding path program 1 times [2022-09-16 12:06:57,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:06:57,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099942816] [2022-09-16 12:06:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:06:57,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:06:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:06:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 12:06:57,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:06:57,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099942816] [2022-09-16 12:06:57,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099942816] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:06:57,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:06:57,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:06:57,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285629923] [2022-09-16 12:06:57,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:06:57,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:06:57,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:06:57,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:06:57,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:06:57,947 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 136 [2022-09-16 12:06:57,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 478 flow. Second operand has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:06:57,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:06:57,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 136 [2022-09-16 12:06:57,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:07:02,348 INFO L130 PetriNetUnfolder]: 9227/31991 cut-off events. [2022-09-16 12:07:02,348 INFO L131 PetriNetUnfolder]: For 34084/34084 co-relation queries the response was YES. [2022-09-16 12:07:02,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54795 conditions, 31991 events. 9227/31991 cut-off events. For 34084/34084 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 349169 event pairs, 7181 based on Foata normal form. 10/27907 useless extension candidates. Maximal degree in co-relation 54727. Up to 11288 conditions per place. [2022-09-16 12:07:02,598 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 29 selfloop transitions, 8 changer transitions 0/127 dead transitions. [2022-09-16 12:07:02,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 127 transitions, 550 flow [2022-09-16 12:07:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:07:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:07:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 525 transitions. [2022-09-16 12:07:02,599 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7720588235294118 [2022-09-16 12:07:02,599 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 525 transitions. [2022-09-16 12:07:02,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 525 transitions. [2022-09-16 12:07:02,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:07:02,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 525 transitions. [2022-09-16 12:07:02,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:02,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:02,601 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:02,601 INFO L175 Difference]: Start difference. First operand has 144 places, 127 transitions, 478 flow. Second operand 5 states and 525 transitions. [2022-09-16 12:07:02,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 127 transitions, 550 flow [2022-09-16 12:07:02,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 127 transitions, 548 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:07:02,622 INFO L231 Difference]: Finished difference. Result has 146 places, 127 transitions, 496 flow [2022-09-16 12:07:02,623 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=146, PETRI_TRANSITIONS=127} [2022-09-16 12:07:02,623 INFO L287 CegarLoopForPetriNet]: 138 programPoint places, 8 predicate places. [2022-09-16 12:07:02,623 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 127 transitions, 496 flow [2022-09-16 12:07:02,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:02,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:07:02,623 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:07:02,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-09-16 12:07:02,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:07:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:07:02,624 INFO L85 PathProgramCache]: Analyzing trace with hash -2057200101, now seen corresponding path program 1 times [2022-09-16 12:07:02,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:07:02,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056603831] [2022-09-16 12:07:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:07:02,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:07:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:07:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:07:02,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:07:02,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056603831] [2022-09-16 12:07:02,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056603831] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:07:02,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999785096] [2022-09-16 12:07:02,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:07:02,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:07:02,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:07:02,672 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:07:02,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-09-16 12:07:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:07:02,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 12:07:02,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:07:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:07:02,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 12:07:02,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999785096] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:07:02,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 12:07:02,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 12:07:02,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269117141] [2022-09-16 12:07:02,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:07:02,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 12:07:02,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:07:02,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 12:07:02,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 12:07:02,828 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 136 [2022-09-16 12:07:02,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 127 transitions, 496 flow. Second operand has 6 states, 6 states have (on average 100.66666666666667) internal successors, (604), 6 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:02,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:07:02,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 136 [2022-09-16 12:07:02,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:07:07,190 INFO L130 PetriNetUnfolder]: 9227/31981 cut-off events. [2022-09-16 12:07:07,190 INFO L131 PetriNetUnfolder]: For 34129/34129 co-relation queries the response was YES. [2022-09-16 12:07:07,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54822 conditions, 31981 events. 9227/31981 cut-off events. For 34129/34129 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 350945 event pairs, 7181 based on Foata normal form. 10/27897 useless extension candidates. Maximal degree in co-relation 28756. Up to 11318 conditions per place. [2022-09-16 12:07:07,475 INFO L137 encePairwiseOnDemand]: 131/136 looper letters, 33 selfloop transitions, 6 changer transitions 0/129 dead transitions. [2022-09-16 12:07:07,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 129 transitions, 576 flow [2022-09-16 12:07:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 12:07:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 12:07:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 726 transitions. [2022-09-16 12:07:07,477 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7626050420168067 [2022-09-16 12:07:07,477 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 726 transitions. [2022-09-16 12:07:07,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 726 transitions. [2022-09-16 12:07:07,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:07:07,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 726 transitions. [2022-09-16 12:07:07,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 103.71428571428571) internal successors, (726), 7 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:07,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:07,479 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:07,479 INFO L175 Difference]: Start difference. First operand has 146 places, 127 transitions, 496 flow. Second operand 7 states and 726 transitions. [2022-09-16 12:07:07,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 129 transitions, 576 flow [2022-09-16 12:07:07,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 129 transitions, 564 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:07:07,507 INFO L231 Difference]: Finished difference. Result has 148 places, 126 transitions, 492 flow [2022-09-16 12:07:07,507 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=492, PETRI_PLACES=148, PETRI_TRANSITIONS=126} [2022-09-16 12:07:07,508 INFO L287 CegarLoopForPetriNet]: 138 programPoint places, 10 predicate places. [2022-09-16 12:07:07,508 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 126 transitions, 492 flow [2022-09-16 12:07:07,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 100.66666666666667) internal successors, (604), 6 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:07,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:07:07,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:07:07,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-09-16 12:07:07,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-09-16 12:07:07,723 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:07:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:07:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1759609778, now seen corresponding path program 1 times [2022-09-16 12:07:07,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:07:07,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341755017] [2022-09-16 12:07:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:07:07,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:07:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:07:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:07:07,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:07:07,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341755017] [2022-09-16 12:07:07,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341755017] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:07:07,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887474625] [2022-09-16 12:07:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:07:07,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:07:07,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:07:07,745 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:07:07,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-09-16 12:07:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:07:07,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:07:07,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:07:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:07:07,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:07:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:07:07,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887474625] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:07:07,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:07:07,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-16 12:07:07,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776911503] [2022-09-16 12:07:07,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:07:07,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 12:07:07,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:07:07,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 12:07:07,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-16 12:07:07,896 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 136 [2022-09-16 12:07:07,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 126 transitions, 492 flow. Second operand has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:07,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:07:07,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 136 [2022-09-16 12:07:07,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:07:12,285 INFO L130 PetriNetUnfolder]: 9225/31975 cut-off events. [2022-09-16 12:07:12,285 INFO L131 PetriNetUnfolder]: For 34142/34142 co-relation queries the response was YES. [2022-09-16 12:07:12,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54803 conditions, 31975 events. 9225/31975 cut-off events. For 34142/34142 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 350045 event pairs, 7185 based on Foata normal form. 2/27883 useless extension candidates. Maximal degree in co-relation 28756. Up to 11293 conditions per place. [2022-09-16 12:07:12,548 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 38 selfloop transitions, 9 changer transitions 0/137 dead transitions. [2022-09-16 12:07:12,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 137 transitions, 624 flow [2022-09-16 12:07:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-16 12:07:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-16 12:07:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 931 transitions. [2022-09-16 12:07:12,549 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7606209150326797 [2022-09-16 12:07:12,549 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 931 transitions. [2022-09-16 12:07:12,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 931 transitions. [2022-09-16 12:07:12,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:07:12,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 931 transitions. [2022-09-16 12:07:12,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.44444444444444) internal successors, (931), 9 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:12,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:12,551 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:12,551 INFO L175 Difference]: Start difference. First operand has 148 places, 126 transitions, 492 flow. Second operand 9 states and 931 transitions. [2022-09-16 12:07:12,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 137 transitions, 624 flow [2022-09-16 12:07:12,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 137 transitions, 611 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-09-16 12:07:12,588 INFO L231 Difference]: Finished difference. Result has 155 places, 130 transitions, 539 flow [2022-09-16 12:07:12,588 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=539, PETRI_PLACES=155, PETRI_TRANSITIONS=130} [2022-09-16 12:07:12,588 INFO L287 CegarLoopForPetriNet]: 138 programPoint places, 17 predicate places. [2022-09-16 12:07:12,588 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 130 transitions, 539 flow [2022-09-16 12:07:12,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:12,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:07:12,588 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:07:12,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-09-16 12:07:12,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-09-16 12:07:12,799 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:07:12,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:07:12,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2111868849, now seen corresponding path program 1 times [2022-09-16 12:07:12,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:07:12,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702411394] [2022-09-16 12:07:12,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:07:12,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:07:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:07:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-09-16 12:07:12,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:07:12,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702411394] [2022-09-16 12:07:12,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702411394] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:07:12,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:07:12,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:07:12,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532497649] [2022-09-16 12:07:12,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:07:12,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:07:12,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:07:12,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:07:12,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:07:12,823 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 136 [2022-09-16 12:07:12,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 130 transitions, 539 flow. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:12,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:07:12,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 136 [2022-09-16 12:07:12,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:07:18,113 INFO L130 PetriNetUnfolder]: 9269/32333 cut-off events. [2022-09-16 12:07:18,113 INFO L131 PetriNetUnfolder]: For 11791/11791 co-relation queries the response was YES. [2022-09-16 12:07:18,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73936 conditions, 32333 events. 9269/32333 cut-off events. For 11791/11791 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 355600 event pairs, 5201 based on Foata normal form. 0/28261 useless extension candidates. Maximal degree in co-relation 38113. Up to 29675 conditions per place. [2022-09-16 12:07:18,388 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 47 selfloop transitions, 4 changer transitions 0/148 dead transitions. [2022-09-16 12:07:18,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 148 transitions, 710 flow [2022-09-16 12:07:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:07:18,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:07:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 543 transitions. [2022-09-16 12:07:18,389 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7985294117647059 [2022-09-16 12:07:18,389 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 543 transitions. [2022-09-16 12:07:18,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 543 transitions. [2022-09-16 12:07:18,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:07:18,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 543 transitions. [2022-09-16 12:07:18,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:18,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:18,391 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:18,391 INFO L175 Difference]: Start difference. First operand has 155 places, 130 transitions, 539 flow. Second operand 5 states and 543 transitions. [2022-09-16 12:07:18,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 148 transitions, 710 flow [2022-09-16 12:07:18,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 148 transitions, 696 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-09-16 12:07:18,397 INFO L231 Difference]: Finished difference. Result has 158 places, 133 transitions, 555 flow [2022-09-16 12:07:18,398 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=555, PETRI_PLACES=158, PETRI_TRANSITIONS=133} [2022-09-16 12:07:18,398 INFO L287 CegarLoopForPetriNet]: 138 programPoint places, 20 predicate places. [2022-09-16 12:07:18,398 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 133 transitions, 555 flow [2022-09-16 12:07:18,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:18,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:07:18,398 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:07:18,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-09-16 12:07:18,399 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:07:18,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:07:18,399 INFO L85 PathProgramCache]: Analyzing trace with hash -941601941, now seen corresponding path program 1 times [2022-09-16 12:07:18,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:07:18,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697926608] [2022-09-16 12:07:18,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:07:18,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:07:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:07:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-09-16 12:07:18,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:07:18,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697926608] [2022-09-16 12:07:18,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697926608] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:07:18,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:07:18,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:07:18,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211092847] [2022-09-16 12:07:18,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:07:18,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:07:18,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:07:18,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:07:18,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:07:18,433 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 136 [2022-09-16 12:07:18,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 133 transitions, 555 flow. Second operand has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:18,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:07:18,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 136 [2022-09-16 12:07:18,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:07:23,631 INFO L130 PetriNetUnfolder]: 9269/30297 cut-off events. [2022-09-16 12:07:23,631 INFO L131 PetriNetUnfolder]: For 14080/14080 co-relation queries the response was YES. [2022-09-16 12:07:23,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78383 conditions, 30297 events. 9269/30297 cut-off events. For 14080/14080 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 318810 event pairs, 7237 based on Foata normal form. 2036/32333 useless extension candidates. Maximal degree in co-relation 40222. Up to 15437 conditions per place. [2022-09-16 12:07:23,921 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 28 selfloop transitions, 8 changer transitions 0/133 dead transitions. [2022-09-16 12:07:23,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 133 transitions, 625 flow [2022-09-16 12:07:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:07:23,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:07:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 524 transitions. [2022-09-16 12:07:23,923 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7705882352941177 [2022-09-16 12:07:23,923 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 524 transitions. [2022-09-16 12:07:23,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 524 transitions. [2022-09-16 12:07:23,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:07:23,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 524 transitions. [2022-09-16 12:07:23,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:23,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:23,925 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:23,925 INFO L175 Difference]: Start difference. First operand has 158 places, 133 transitions, 555 flow. Second operand 5 states and 524 transitions. [2022-09-16 12:07:23,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 133 transitions, 625 flow [2022-09-16 12:07:23,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 133 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:07:23,947 INFO L231 Difference]: Finished difference. Result has 161 places, 133 transitions, 573 flow [2022-09-16 12:07:23,947 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=573, PETRI_PLACES=161, PETRI_TRANSITIONS=133} [2022-09-16 12:07:23,947 INFO L287 CegarLoopForPetriNet]: 138 programPoint places, 23 predicate places. [2022-09-16 12:07:23,947 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 133 transitions, 573 flow [2022-09-16 12:07:23,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:23,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:07:23,948 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:07:23,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-09-16 12:07:23,948 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:07:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:07:23,948 INFO L85 PathProgramCache]: Analyzing trace with hash 534147566, now seen corresponding path program 1 times [2022-09-16 12:07:23,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:07:23,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28626520] [2022-09-16 12:07:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:07:23,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:07:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:07:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:07:24,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:07:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28626520] [2022-09-16 12:07:24,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28626520] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:07:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298649693] [2022-09-16 12:07:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:07:24,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:07:24,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:07:24,005 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:07:24,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-09-16 12:07:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:07:24,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-16 12:07:24,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:07:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:07:24,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:07:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:07:24,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298649693] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:07:24,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:07:24,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-09-16 12:07:24,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204403016] [2022-09-16 12:07:24,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:07:24,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-16 12:07:24,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:07:24,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-16 12:07:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-09-16 12:07:24,232 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 136 [2022-09-16 12:07:24,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 133 transitions, 573 flow. Second operand has 18 states, 18 states have (on average 101.5) internal successors, (1827), 18 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:24,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:07:24,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 136 [2022-09-16 12:07:24,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:07:29,042 INFO L130 PetriNetUnfolder]: 9251/30151 cut-off events. [2022-09-16 12:07:29,042 INFO L131 PetriNetUnfolder]: For 40693/40693 co-relation queries the response was YES. [2022-09-16 12:07:29,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71817 conditions, 30151 events. 9251/30151 cut-off events. For 40693/40693 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 322301 event pairs, 7335 based on Foata normal form. 4/30155 useless extension candidates. Maximal degree in co-relation 37123. Up to 11315 conditions per place. [2022-09-16 12:07:29,333 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 54 selfloop transitions, 21 changer transitions 0/168 dead transitions. [2022-09-16 12:07:29,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 168 transitions, 885 flow [2022-09-16 12:07:29,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-16 12:07:29,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-16 12:07:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2137 transitions. [2022-09-16 12:07:29,335 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.748249299719888 [2022-09-16 12:07:29,335 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2137 transitions. [2022-09-16 12:07:29,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2137 transitions. [2022-09-16 12:07:29,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:07:29,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2137 transitions. [2022-09-16 12:07:29,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 101.76190476190476) internal successors, (2137), 21 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:29,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 136.0) internal successors, (2992), 22 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:29,340 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 136.0) internal successors, (2992), 22 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:29,340 INFO L175 Difference]: Start difference. First operand has 161 places, 133 transitions, 573 flow. Second operand 21 states and 2137 transitions. [2022-09-16 12:07:29,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 168 transitions, 885 flow [2022-09-16 12:07:29,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 168 transitions, 873 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:07:29,383 INFO L231 Difference]: Finished difference. Result has 183 places, 146 transitions, 725 flow [2022-09-16 12:07:29,383 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=725, PETRI_PLACES=183, PETRI_TRANSITIONS=146} [2022-09-16 12:07:29,383 INFO L287 CegarLoopForPetriNet]: 138 programPoint places, 45 predicate places. [2022-09-16 12:07:29,383 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 146 transitions, 725 flow [2022-09-16 12:07:29,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 101.5) internal successors, (1827), 18 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:29,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:07:29,384 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:07:29,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-09-16 12:07:29,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:07:29,599 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:07:29,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:07:29,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1966704516, now seen corresponding path program 1 times [2022-09-16 12:07:29,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:07:29,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326944935] [2022-09-16 12:07:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:07:29,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:07:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:07:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:07:29,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:07:29,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326944935] [2022-09-16 12:07:29,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326944935] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:07:29,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494416084] [2022-09-16 12:07:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:07:29,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:07:29,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:07:29,728 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 12:07:29,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-09-16 12:07:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:07:29,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 16 conjunts are in the unsatisfiable core [2022-09-16 12:07:29,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:07:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:07:29,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:07:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-16 12:07:30,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494416084] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:07:30,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:07:30,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-09-16 12:07:30,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524187557] [2022-09-16 12:07:30,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:07:30,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-16 12:07:30,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:07:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-16 12:07:30,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-09-16 12:07:30,237 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 136 [2022-09-16 12:07:30,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 146 transitions, 725 flow. Second operand has 34 states, 34 states have (on average 101.73529411764706) internal successors, (3459), 34 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:30,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:07:30,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 136 [2022-09-16 12:07:30,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:07:30,609 INFO L130 PetriNetUnfolder]: 0/212 cut-off events. [2022-09-16 12:07:30,609 INFO L131 PetriNetUnfolder]: For 605/605 co-relation queries the response was YES. [2022-09-16 12:07:30,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 212 events. 0/212 cut-off events. For 605/605 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 109 event pairs, 0 based on Foata normal form. 5/217 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-09-16 12:07:30,610 INFO L137 encePairwiseOnDemand]: 131/136 looper letters, 58 selfloop transitions, 34 changer transitions 0/170 dead transitions. [2022-09-16 12:07:30,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 170 transitions, 1044 flow [2022-09-16 12:07:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-09-16 12:07:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-09-16 12:07:30,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3625 transitions. [2022-09-16 12:07:30,613 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7404003267973857 [2022-09-16 12:07:30,613 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3625 transitions. [2022-09-16 12:07:30,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3625 transitions. [2022-09-16 12:07:30,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:07:30,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3625 transitions. [2022-09-16 12:07:30,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 100.69444444444444) internal successors, (3625), 36 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:30,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 136.0) internal successors, (5032), 37 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:30,621 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 136.0) internal successors, (5032), 37 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:30,621 INFO L175 Difference]: Start difference. First operand has 183 places, 146 transitions, 725 flow. Second operand 36 states and 3625 transitions. [2022-09-16 12:07:30,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 170 transitions, 1044 flow [2022-09-16 12:07:30,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 170 transitions, 826 flow, removed 82 selfloop flow, removed 14 redundant places. [2022-09-16 12:07:30,626 INFO L231 Difference]: Finished difference. Result has 188 places, 131 transitions, 575 flow [2022-09-16 12:07:30,626 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=575, PETRI_PLACES=188, PETRI_TRANSITIONS=131} [2022-09-16 12:07:30,627 INFO L287 CegarLoopForPetriNet]: 138 programPoint places, 50 predicate places. [2022-09-16 12:07:30,627 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 131 transitions, 575 flow [2022-09-16 12:07:30,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 101.73529411764706) internal successors, (3459), 34 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:07:30,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:07:30,628 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:07:30,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-09-16 12:07:30,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:07:30,835 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 2 more)] === [2022-09-16 12:07:30,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:07:30,836 INFO L85 PathProgramCache]: Analyzing trace with hash -19279335, now seen corresponding path program 1 times [2022-09-16 12:07:30,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:07:30,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522664760] [2022-09-16 12:07:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:07:30,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:07:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:07:30,852 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-16 12:07:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-16 12:07:30,901 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-16 12:07:30,902 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-16 12:07:30,902 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-09-16 12:07:30,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2022-09-16 12:07:30,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2022-09-16 12:07:30,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 5 remaining) [2022-09-16 12:07:30,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 5 remaining) [2022-09-16 12:07:30,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-09-16 12:07:30,903 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:07:30,903 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-16 12:07:30,903 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2022-09-16 12:07:30,918 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-09-16 12:07:30,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 143 transitions, 514 flow