/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-RepeatedSemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 22:53:13,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 22:53:13,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 22:53:13,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 22:53:13,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 22:53:13,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 22:53:13,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 22:53:13,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 22:53:13,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 22:53:13,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 22:53:13,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 22:53:13,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 22:53:13,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 22:53:13,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 22:53:13,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 22:53:13,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 22:53:13,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 22:53:13,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 22:53:13,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 22:53:13,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 22:53:13,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 22:53:13,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 22:53:13,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 22:53:13,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 22:53:13,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-12-05 22:53:13,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 22:53:13,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 22:53:13,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 22:53:13,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 22:53:13,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 22:53:13,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 22:53:13,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 22:53:13,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 22:53:13,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 22:53:13,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 22:53:13,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 22:53:13,452 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-RepeatedSemanticLbe.epf [2022-12-05 22:53:13,489 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 22:53:13,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 22:53:13,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 22:53:13,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 22:53:13,491 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 22:53:13,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 22:53:13,492 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 22:53:13,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 22:53:13,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 22:53:13,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 22:53:13,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 22:53:13,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 22:53:13,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 22:53:13,493 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 22:53:13,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 22:53:13,494 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 22:53:13,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 22:53:13,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 22:53:13,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 22:53:13,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 22:53:13,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 22:53:13,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:53:13,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 22:53:13,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 22:53:13,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 22:53:13,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 22:53:13,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 22:53:13,495 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=REPEATED_LIPTON_PN [2022-12-05 22:53:13,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 22:53:13,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 22:53:13,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 22:53:13,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 22:53:13,873 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 22:53:13,874 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 22:53:13,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc.i [2022-12-05 22:53:14,954 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 22:53:15,231 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 22:53:15,231 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i [2022-12-05 22:53:15,244 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d64ffdae6/2c9b2f9d4b844f4d99a5c408e69f4593/FLAG829a7f689 [2022-12-05 22:53:15,258 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d64ffdae6/2c9b2f9d4b844f4d99a5c408e69f4593 [2022-12-05 22:53:15,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 22:53:15,262 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 22:53:15,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 22:53:15,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 22:53:15,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 22:53:15,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:53:15" (1/1) ... [2022-12-05 22:53:15,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69737694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:53:15, skipping insertion in model container [2022-12-05 22:53:15,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:53:15" (1/1) ... [2022-12-05 22:53:15,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 22:53:15,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 22:53:15,428 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-05 22:53:15,561 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:53:15,562 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:53:15,562 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:53:15,564 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2022-12-05 22:53:15,569 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:53:15,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:53:15,584 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 22:53:15,605 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-05 22:53:15,630 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:53:15,630 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:53:15,631 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:53:15,631 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2022-12-05 22:53:15,632 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:53:15,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:53:15,670 INFO L208 MainTranslator]: Completed translation [2022-12-05 22:53:15,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:53:15 WrapperNode [2022-12-05 22:53:15,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 22:53:15,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 22:53:15,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 22:53:15,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 22:53:15,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:53:15" (1/1) ... [2022-12-05 22:53:15,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:53:15" (1/1) ... [2022-12-05 22:53:15,718 INFO L138 Inliner]: procedures = 173, calls = 20, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 62 [2022-12-05 22:53:15,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 22:53:15,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 22:53:15,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 22:53:15,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 22:53:15,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:53:15" (1/1) ... [2022-12-05 22:53:15,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:53:15" (1/1) ... [2022-12-05 22:53:15,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:53:15" (1/1) ... [2022-12-05 22:53:15,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:53:15" (1/1) ... [2022-12-05 22:53:15,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:53:15" (1/1) ... [2022-12-05 22:53:15,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:53:15" (1/1) ... [2022-12-05 22:53:15,757 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:53:15" (1/1) ... [2022-12-05 22:53:15,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:53:15" (1/1) ... [2022-12-05 22:53:15,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 22:53:15,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 22:53:15,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 22:53:15,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 22:53:15,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:53:15" (1/1) ... [2022-12-05 22:53:15,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:53:15,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:53:15,792 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) [2022-12-05 22:53:15,806 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 [2022-12-05 22:53:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-05 22:53:15,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-05 22:53:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 22:53:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 22:53:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 22:53:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 22:53:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 22:53:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 22:53:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 22:53:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 22:53:15,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 22:53:15,832 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 22:53:15,928 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 22:53:15,930 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 22:53:16,096 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 22:53:16,141 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 22:53:16,141 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-05 22:53:16,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:53:16 BoogieIcfgContainer [2022-12-05 22:53:16,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 22:53:16,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 22:53:16,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 22:53:16,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 22:53:16,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 10:53:15" (1/3) ... [2022-12-05 22:53:16,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f232b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:53:16, skipping insertion in model container [2022-12-05 22:53:16,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:53:15" (2/3) ... [2022-12-05 22:53:16,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f232b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:53:16, skipping insertion in model container [2022-12-05 22:53:16,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:53:16" (3/3) ... [2022-12-05 22:53:16,149 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2022-12-05 22:53:16,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 22:53:16,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 22:53:16,164 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 22:53:16,215 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-05 22:53:16,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2022-12-05 22:53:16,322 INFO L130 PetriNetUnfolder]: 3/50 cut-off events. [2022-12-05 22:53:16,322 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 22:53:16,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2022-12-05 22:53:16,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 85 flow [2022-12-05 22:53:16,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 85 flow [2022-12-05 22:53:16,330 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:53:16,364 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 40 transitions, 85 flow [2022-12-05 22:53:16,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2022-12-05 22:53:16,395 INFO L130 PetriNetUnfolder]: 3/50 cut-off events. [2022-12-05 22:53:16,395 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 22:53:16,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2022-12-05 22:53:16,397 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 40 transitions, 85 flow [2022-12-05 22:53:16,397 INFO L188 LiptonReduction]: Number of co-enabled transitions 364 [2022-12-05 22:53:18,475 INFO L203 LiptonReduction]: Total number of compositions: 33 [2022-12-05 22:53:18,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 22:53:18,494 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=REPEATED_LIPTON_PN, 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;@234011a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 22:53:18,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 22:53:18,497 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-12-05 22:53:18,497 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 22:53:18,497 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:53:18,498 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-05 22:53:18,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-05 22:53:18,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:53:18,502 INFO L85 PathProgramCache]: Analyzing trace with hash 7525464, now seen corresponding path program 1 times [2022-12-05 22:53:18,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:53:18,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145061133] [2022-12-05 22:53:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:53:18,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:53:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:53:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:53:18,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:53:18,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145061133] [2022-12-05 22:53:18,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145061133] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:53:18,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:53:18,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-05 22:53:18,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043257715] [2022-12-05 22:53:18,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:53:18,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-05 22:53:18,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:53:18,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-05 22:53:18,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-05 22:53:18,656 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 11 [2022-12-05 22:53:18,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 27 flow. Second operand has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:53:18,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:53:18,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 11 [2022-12-05 22:53:18,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:53:18,688 INFO L130 PetriNetUnfolder]: 12/34 cut-off events. [2022-12-05 22:53:18,688 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 22:53:18,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 34 events. 12/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 95 event pairs, 12 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 44. Up to 35 conditions per place. [2022-12-05 22:53:18,690 INFO L137 encePairwiseOnDemand]: 9/11 looper letters, 9 selfloop transitions, 0 changer transitions 0/9 dead transitions. [2022-12-05 22:53:18,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 9 transitions, 41 flow [2022-12-05 22:53:18,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-05 22:53:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-05 22:53:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 11 transitions. [2022-12-05 22:53:18,699 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-12-05 22:53:18,700 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 27 flow. Second operand 2 states and 11 transitions. [2022-12-05 22:53:18,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 9 transitions, 41 flow [2022-12-05 22:53:18,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 9 transitions, 41 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 22:53:18,703 INFO L231 Difference]: Finished difference. Result has 13 places, 9 transitions, 23 flow [2022-12-05 22:53:18,705 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=11, PETRI_DIFFERENCE_MINUEND_FLOW=23, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=23, PETRI_PLACES=13, PETRI_TRANSITIONS=9} [2022-12-05 22:53:18,708 INFO L294 CegarLoopForPetriNet]: 14 programPoint places, -1 predicate places. [2022-12-05 22:53:18,708 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:53:18,709 INFO L89 Accepts]: Start accepts. Operand has 13 places, 9 transitions, 23 flow [2022-12-05 22:53:18,711 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:53:18,711 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:53:18,711 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 13 places, 9 transitions, 23 flow [2022-12-05 22:53:18,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 12 places, 9 transitions, 23 flow [2022-12-05 22:53:18,715 INFO L130 PetriNetUnfolder]: 0/10 cut-off events. [2022-12-05 22:53:18,716 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 22:53:18,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 10 events. 0/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 11 event pairs, 0 based on Foata normal form. 0/7 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-12-05 22:53:18,716 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 12 places, 9 transitions, 23 flow [2022-12-05 22:53:18,716 INFO L188 LiptonReduction]: Number of co-enabled transitions 24 [2022-12-05 22:53:18,716 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-05 22:53:18,718 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 10 [2022-12-05 22:53:18,718 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 9 transitions, 23 flow [2022-12-05 22:53:18,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:53:18,718 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:53:18,718 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-05 22:53:18,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 22:53:18,719 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-05 22:53:18,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:53:18,719 INFO L85 PathProgramCache]: Analyzing trace with hash 233288716, now seen corresponding path program 1 times [2022-12-05 22:53:18,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:53:18,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222396222] [2022-12-05 22:53:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:53:18,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:53:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-05 22:53:18,739 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-05 22:53:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-05 22:53:18,768 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-05 22:53:18,769 INFO L373 BasicCegarLoop]: Counterexample is feasible [2022-12-05 22:53:18,770 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-05 22:53:18,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-05 22:53:18,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-05 22:53:18,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 22:53:18,772 INFO L458 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-05 22:53:18,774 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-05 22:53:18,774 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-05 22:53:18,786 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-05 22:53:18,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2022-12-05 22:53:18,798 INFO L130 PetriNetUnfolder]: 5/77 cut-off events. [2022-12-05 22:53:18,798 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:53:18,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2022-12-05 22:53:18,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 122 flow [2022-12-05 22:53:18,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2022-12-05 22:53:18,800 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:53:18,800 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 122 flow [2022-12-05 22:53:18,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2022-12-05 22:53:18,812 INFO L130 PetriNetUnfolder]: 5/77 cut-off events. [2022-12-05 22:53:18,812 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:53:18,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2022-12-05 22:53:18,813 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 122 flow [2022-12-05 22:53:18,814 INFO L188 LiptonReduction]: Number of co-enabled transitions 1148 [2022-12-05 22:53:20,004 INFO L203 LiptonReduction]: Total number of compositions: 31 [2022-12-05 22:53:20,006 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 22:53:20,007 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=REPEATED_LIPTON_PN, 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;@234011a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 22:53:20,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-05 22:53:20,011 INFO L130 PetriNetUnfolder]: 1/22 cut-off events. [2022-12-05 22:53:20,011 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:53:20,011 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:53:20,011 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2022-12-05 22:53:20,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-05 22:53:20,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:53:20,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1246585728, now seen corresponding path program 1 times [2022-12-05 22:53:20,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:53:20,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462510462] [2022-12-05 22:53:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:53:20,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:53:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-05 22:53:20,029 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-05 22:53:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-05 22:53:20,043 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-05 22:53:20,043 INFO L373 BasicCegarLoop]: Counterexample is feasible [2022-12-05 22:53:20,044 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-05 22:53:20,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-05 22:53:20,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-05 22:53:20,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-05 22:53:20,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 22:53:20,044 INFO L458 BasicCegarLoop]: Path program histogram: [1] [2022-12-05 22:53:20,045 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-05 22:53:20,045 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-05 22:53:20,075 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-05 22:53:20,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2022-12-05 22:53:20,088 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2022-12-05 22:53:20,089 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-05 22:53:20,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2022-12-05 22:53:20,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 70 transitions, 161 flow [2022-12-05 22:53:20,090 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 161 flow [2022-12-05 22:53:20,090 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:53:20,091 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 70 transitions, 161 flow [2022-12-05 22:53:20,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2022-12-05 22:53:20,102 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2022-12-05 22:53:20,102 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-05 22:53:20,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2022-12-05 22:53:20,105 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 70 transitions, 161 flow [2022-12-05 22:53:20,105 INFO L188 LiptonReduction]: Number of co-enabled transitions 2352 [2022-12-05 22:53:21,424 INFO L203 LiptonReduction]: Total number of compositions: 36 [2022-12-05 22:53:21,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 22:53:21,434 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=REPEATED_LIPTON_PN, 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;@234011a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 22:53:21,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-05 22:53:21,442 INFO L130 PetriNetUnfolder]: 1/26 cut-off events. [2022-12-05 22:53:21,442 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-05 22:53:21,442 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:53:21,442 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:53:21,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-05 22:53:21,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:53:21,443 INFO L85 PathProgramCache]: Analyzing trace with hash -2092237327, now seen corresponding path program 1 times [2022-12-05 22:53:21,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:53:21,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899211159] [2022-12-05 22:53:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:53:21,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:53:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:53:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:53:21,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:53:21,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899211159] [2022-12-05 22:53:21,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899211159] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:53:21,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:53:21,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:53:21,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202839932] [2022-12-05 22:53:21,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:53:21,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:53:21,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:53:21,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:53:21,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-05 22:53:21,694 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 38 [2022-12-05 22:53:21,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 97 flow. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:53:21,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:53:21,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 38 [2022-12-05 22:53:21,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:53:23,242 INFO L130 PetriNetUnfolder]: 14484/20395 cut-off events. [2022-12-05 22:53:23,243 INFO L131 PetriNetUnfolder]: For 9007/9007 co-relation queries the response was YES. [2022-12-05 22:53:23,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45436 conditions, 20395 events. 14484/20395 cut-off events. For 9007/9007 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 114643 event pairs, 2943 based on Foata normal form. 0/16038 useless extension candidates. Maximal degree in co-relation 17870. Up to 8658 conditions per place. [2022-12-05 22:53:23,383 INFO L137 encePairwiseOnDemand]: 26/38 looper letters, 112 selfloop transitions, 14 changer transitions 0/126 dead transitions. [2022-12-05 22:53:23,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 126 transitions, 587 flow [2022-12-05 22:53:23,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 22:53:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 22:53:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2022-12-05 22:53:23,388 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6008771929824561 [2022-12-05 22:53:23,388 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 97 flow. Second operand 6 states and 137 transitions. [2022-12-05 22:53:23,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 126 transitions, 587 flow [2022-12-05 22:53:23,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 126 transitions, 557 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-12-05 22:53:23,396 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 189 flow [2022-12-05 22:53:23,396 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2022-12-05 22:53:23,398 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2022-12-05 22:53:23,398 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:53:23,398 INFO L89 Accepts]: Start accepts. Operand has 50 places, 50 transitions, 189 flow [2022-12-05 22:53:23,399 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:53:23,399 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:53:23,400 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 50 places, 50 transitions, 189 flow [2022-12-05 22:53:23,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 50 transitions, 189 flow [2022-12-05 22:53:23,417 INFO L130 PetriNetUnfolder]: 22/142 cut-off events. [2022-12-05 22:53:23,418 INFO L131 PetriNetUnfolder]: For 26/35 co-relation queries the response was YES. [2022-12-05 22:53:23,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 142 events. 22/142 cut-off events. For 26/35 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 781 event pairs, 5 based on Foata normal form. 1/123 useless extension candidates. Maximal degree in co-relation 236. Up to 24 conditions per place. [2022-12-05 22:53:23,420 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 50 places, 50 transitions, 189 flow [2022-12-05 22:53:23,422 INFO L188 LiptonReduction]: Number of co-enabled transitions 1082 [2022-12-05 22:53:23,485 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-05 22:53:23,491 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 93 [2022-12-05 22:53:23,492 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 189 flow [2022-12-05 22:53:23,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:53:23,492 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:53:23,492 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2022-12-05 22:53:23,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 22:53:23,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-05 22:53:23,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:53:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1105612321, now seen corresponding path program 1 times [2022-12-05 22:53:23,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:53:23,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147014060] [2022-12-05 22:53:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:53:23,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:53:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-05 22:53:23,518 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-05 22:53:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-05 22:53:23,534 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-05 22:53:23,534 INFO L373 BasicCegarLoop]: Counterexample is feasible [2022-12-05 22:53:23,534 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-05 22:53:23,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-05 22:53:23,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-05 22:53:23,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-05 22:53:23,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-05 22:53:23,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-05 22:53:23,535 INFO L458 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-05 22:53:23,536 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-05 22:53:23,536 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-05 22:53:23,554 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-05 22:53:23,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 85 transitions, 202 flow [2022-12-05 22:53:23,567 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2022-12-05 22:53:23,567 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-05 22:53:23,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2022-12-05 22:53:23,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 85 transitions, 202 flow [2022-12-05 22:53:23,569 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 85 transitions, 202 flow [2022-12-05 22:53:23,569 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:53:23,569 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 85 transitions, 202 flow [2022-12-05 22:53:23,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 85 transitions, 202 flow [2022-12-05 22:53:23,580 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2022-12-05 22:53:23,580 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-05 22:53:23,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2022-12-05 22:53:23,583 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 85 transitions, 202 flow [2022-12-05 22:53:23,584 INFO L188 LiptonReduction]: Number of co-enabled transitions 3976 [2022-12-05 22:53:25,266 INFO L203 LiptonReduction]: Total number of compositions: 41 [2022-12-05 22:53:25,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 22:53:25,268 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=REPEATED_LIPTON_PN, 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;@234011a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 22:53:25,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-05 22:53:25,270 INFO L130 PetriNetUnfolder]: 1/24 cut-off events. [2022-12-05 22:53:25,270 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-05 22:53:25,271 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:53:25,271 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:53:25,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-05 22:53:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:53:25,271 INFO L85 PathProgramCache]: Analyzing trace with hash -135628981, now seen corresponding path program 1 times [2022-12-05 22:53:25,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:53:25,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510541605] [2022-12-05 22:53:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:53:25,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:53:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:53:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:53:25,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:53:25,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510541605] [2022-12-05 22:53:25,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510541605] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:53:25,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:53:25,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:53:25,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451590924] [2022-12-05 22:53:25,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:53:25,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:53:25,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:53:25,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:53:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-05 22:53:25,420 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-05 22:53:25,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 130 flow. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:53:25,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:53:25,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-05 22:53:25,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:53:40,826 INFO L130 PetriNetUnfolder]: 229217/295283 cut-off events. [2022-12-05 22:53:40,826 INFO L131 PetriNetUnfolder]: For 168313/168313 co-relation queries the response was YES. [2022-12-05 22:53:41,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659523 conditions, 295283 events. 229217/295283 cut-off events. For 168313/168313 co-relation queries the response was YES. Maximal size of possible extension queue 7745. Compared 1794978 event pairs, 52459 based on Foata normal form. 0/225593 useless extension candidates. Maximal degree in co-relation 101456. Up to 138842 conditions per place. [2022-12-05 22:53:42,582 INFO L137 encePairwiseOnDemand]: 35/49 looper letters, 154 selfloop transitions, 17 changer transitions 0/171 dead transitions. [2022-12-05 22:53:42,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 171 transitions, 822 flow [2022-12-05 22:53:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 22:53:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 22:53:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2022-12-05 22:53:42,588 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2022-12-05 22:53:42,588 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 130 flow. Second operand 6 states and 184 transitions. [2022-12-05 22:53:42,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 171 transitions, 822 flow [2022-12-05 22:53:42,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 171 transitions, 762 flow, removed 30 selfloop flow, removed 0 redundant places. [2022-12-05 22:53:42,668 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 243 flow [2022-12-05 22:53:42,668 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2022-12-05 22:53:42,671 INFO L294 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2022-12-05 22:53:42,671 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:53:42,672 INFO L89 Accepts]: Start accepts. Operand has 62 places, 65 transitions, 243 flow [2022-12-05 22:53:42,673 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:53:42,673 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:53:42,673 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 65 transitions, 243 flow [2022-12-05 22:53:42,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 65 transitions, 243 flow [2022-12-05 22:53:42,708 INFO L130 PetriNetUnfolder]: 95/385 cut-off events. [2022-12-05 22:53:42,709 INFO L131 PetriNetUnfolder]: For 55/87 co-relation queries the response was YES. [2022-12-05 22:53:42,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 385 events. 95/385 cut-off events. For 55/87 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2628 event pairs, 28 based on Foata normal form. 1/327 useless extension candidates. Maximal degree in co-relation 675. Up to 71 conditions per place. [2022-12-05 22:53:42,717 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 65 transitions, 243 flow [2022-12-05 22:53:42,717 INFO L188 LiptonReduction]: Number of co-enabled transitions 2152 [2022-12-05 22:53:42,779 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-05 22:53:42,781 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 110 [2022-12-05 22:53:42,781 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 243 flow [2022-12-05 22:53:42,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:53:42,782 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:53:42,782 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:53:42,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-05 22:53:42,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-05 22:53:42,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:53:42,782 INFO L85 PathProgramCache]: Analyzing trace with hash 40076032, now seen corresponding path program 1 times [2022-12-05 22:53:42,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:53:42,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591752165] [2022-12-05 22:53:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:53:42,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:53:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:53:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:53:42,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:53:42,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591752165] [2022-12-05 22:53:42,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591752165] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:53:42,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:53:42,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:53:42,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029970268] [2022-12-05 22:53:42,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:53:42,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:53:42,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:53:42,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:53:42,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-05 22:53:42,908 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 48 [2022-12-05 22:53:42,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 243 flow. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:53:42,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:53:42,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 48 [2022-12-05 22:53:42,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:54:08,072 INFO L130 PetriNetUnfolder]: 348187/451753 cut-off events. [2022-12-05 22:54:08,073 INFO L131 PetriNetUnfolder]: For 171870/171870 co-relation queries the response was YES. [2022-12-05 22:54:09,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1067872 conditions, 451753 events. 348187/451753 cut-off events. For 171870/171870 co-relation queries the response was YES. Maximal size of possible extension queue 11674. Compared 2946291 event pairs, 97358 based on Foata normal form. 0/386171 useless extension candidates. Maximal degree in co-relation 771911. Up to 225699 conditions per place. [2022-12-05 22:54:10,906 INFO L137 encePairwiseOnDemand]: 39/48 looper letters, 165 selfloop transitions, 27 changer transitions 0/192 dead transitions. [2022-12-05 22:54:10,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 192 transitions, 1048 flow [2022-12-05 22:54:10,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 22:54:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 22:54:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2022-12-05 22:54:10,908 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.59375 [2022-12-05 22:54:10,908 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 243 flow. Second operand 6 states and 171 transitions. [2022-12-05 22:54:10,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 192 transitions, 1048 flow [2022-12-05 22:54:21,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 192 transitions, 1048 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 22:54:21,285 INFO L231 Difference]: Finished difference. Result has 69 places, 82 transitions, 421 flow [2022-12-05 22:54:21,286 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=421, PETRI_PLACES=69, PETRI_TRANSITIONS=82} [2022-12-05 22:54:21,286 INFO L294 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2022-12-05 22:54:21,286 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:54:21,287 INFO L89 Accepts]: Start accepts. Operand has 69 places, 82 transitions, 421 flow [2022-12-05 22:54:21,289 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:54:21,290 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:54:21,290 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 82 transitions, 421 flow [2022-12-05 22:54:21,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 82 transitions, 421 flow [2022-12-05 22:54:21,417 INFO L130 PetriNetUnfolder]: 276/1193 cut-off events. [2022-12-05 22:54:21,417 INFO L131 PetriNetUnfolder]: For 553/780 co-relation queries the response was YES. [2022-12-05 22:54:21,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2445 conditions, 1193 events. 276/1193 cut-off events. For 553/780 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 11622 event pairs, 82 based on Foata normal form. 15/1033 useless extension candidates. Maximal degree in co-relation 2419. Up to 254 conditions per place. [2022-12-05 22:54:21,438 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 82 transitions, 421 flow [2022-12-05 22:54:21,438 INFO L188 LiptonReduction]: Number of co-enabled transitions 2688 [2022-12-05 22:54:21,513 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-05 22:54:21,513 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 227 [2022-12-05 22:54:21,514 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 82 transitions, 421 flow [2022-12-05 22:54:21,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:54:21,514 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:54:21,514 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-12-05 22:54:21,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-05 22:54:21,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-05 22:54:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:54:21,514 INFO L85 PathProgramCache]: Analyzing trace with hash -291731083, now seen corresponding path program 1 times [2022-12-05 22:54:21,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:54:21,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941765907] [2022-12-05 22:54:21,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:54:21,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:54:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-05 22:54:21,529 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-05 22:54:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-05 22:54:21,547 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-05 22:54:21,547 INFO L373 BasicCegarLoop]: Counterexample is feasible [2022-12-05 22:54:21,548 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-05 22:54:21,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-05 22:54:21,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-05 22:54:21,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-05 22:54:21,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-05 22:54:21,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-05 22:54:21,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-05 22:54:21,549 INFO L458 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-05 22:54:21,549 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-05 22:54:21,549 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-05 22:54:21,575 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-05 22:54:21,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 100 transitions, 245 flow [2022-12-05 22:54:21,593 INFO L130 PetriNetUnfolder]: 11/158 cut-off events. [2022-12-05 22:54:21,593 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-05 22:54:21,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 158 events. 11/158 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 330 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 144. Up to 12 conditions per place. [2022-12-05 22:54:21,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 100 transitions, 245 flow [2022-12-05 22:54:21,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 100 transitions, 245 flow [2022-12-05 22:54:21,595 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:54:21,595 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 100 transitions, 245 flow [2022-12-05 22:54:21,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 100 transitions, 245 flow [2022-12-05 22:54:21,606 INFO L130 PetriNetUnfolder]: 11/158 cut-off events. [2022-12-05 22:54:21,606 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-05 22:54:21,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 158 events. 11/158 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 330 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 144. Up to 12 conditions per place. [2022-12-05 22:54:21,612 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 100 transitions, 245 flow [2022-12-05 22:54:21,612 INFO L188 LiptonReduction]: Number of co-enabled transitions 6020 [2022-12-05 22:54:23,396 INFO L203 LiptonReduction]: Total number of compositions: 46 [2022-12-05 22:54:23,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 22:54:23,399 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=REPEATED_LIPTON_PN, 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;@234011a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 22:54:23,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-05 22:54:23,401 INFO L130 PetriNetUnfolder]: 1/24 cut-off events. [2022-12-05 22:54:23,401 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-05 22:54:23,401 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:54:23,401 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:54:23,401 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-05 22:54:23,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:54:23,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2090563685, now seen corresponding path program 1 times [2022-12-05 22:54:23,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:54:23,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129501363] [2022-12-05 22:54:23,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:54:23,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:54:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:54:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:54:23,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:54:23,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129501363] [2022-12-05 22:54:23,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129501363] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:54:23,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:54:23,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:54:23,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987853580] [2022-12-05 22:54:23,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:54:23,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:54:23,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:54:23,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:54:23,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-05 22:54:23,493 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 60 [2022-12-05 22:54:23,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 165 flow. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:54:23,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:54:23,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 60 [2022-12-05 22:54:23,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand