/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 17:58:46,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 17:58:46,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 17:58:46,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 17:58:46,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 17:58:46,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 17:58:46,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 17:58:46,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 17:58:46,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 17:58:46,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 17:58:46,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 17:58:46,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 17:58:46,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 17:58:46,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 17:58:46,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 17:58:46,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 17:58:46,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 17:58:46,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 17:58:46,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 17:58:46,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 17:58:46,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 17:58:46,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 17:58:46,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 17:58:46,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 17:58:46,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 17:58:46,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 17:58:46,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 17:58:46,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 17:58:46,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 17:58:46,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 17:58:46,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 17:58:46,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 17:58:46,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 17:58:46,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 17:58:46,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 17:58:46,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 17:58:46,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 17:58:46,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 17:58:46,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 17:58:46,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 17:58:46,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 17:58:46,529 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-VariableLbe.epf [2023-01-27 17:58:46,564 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 17:58:46,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 17:58:46,565 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 17:58:46,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 17:58:46,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 17:58:46,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 17:58:46,566 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 17:58:46,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 17:58:46,566 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 17:58:46,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 17:58:46,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 17:58:46,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 17:58:46,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 17:58:46,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 17:58:46,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 17:58:46,567 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 17:58:46,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 17:58:46,567 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 17:58:46,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 17:58:46,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 17:58:46,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 17:58:46,568 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 17:58:46,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 17:58:46,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:58:46,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 17:58:46,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 17:58:46,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 17:58:46,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 17:58:46,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 17:58:46,585 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 17:58:46,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 17:58:46,585 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 17:58:46,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 17:58:46,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 17:58:46,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 17:58:46,954 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 17:58:46,954 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 17:58:46,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-01-27 17:58:48,679 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 17:58:49,047 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 17:58:49,048 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-01-27 17:58:49,073 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d78d55efa/8e6050b9e1e344e68b0613aa2038d69c/FLAGdf801e648 [2023-01-27 17:58:49,104 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d78d55efa/8e6050b9e1e344e68b0613aa2038d69c [2023-01-27 17:58:49,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 17:58:49,107 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 17:58:49,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 17:58:49,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 17:58:49,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 17:58:49,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:58:49" (1/1) ... [2023-01-27 17:58:49,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ea507b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:58:49, skipping insertion in model container [2023-01-27 17:58:49,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:58:49" (1/1) ... [2023-01-27 17:58:49,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 17:58:49,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 17:58:49,641 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2023-01-27 17:58:49,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:58:49,667 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 17:58:49,736 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2023-01-27 17:58:49,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:58:49,783 INFO L208 MainTranslator]: Completed translation [2023-01-27 17:58:49,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:58:49 WrapperNode [2023-01-27 17:58:49,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 17:58:49,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 17:58:49,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 17:58:49,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 17:58:49,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:58:49" (1/1) ... [2023-01-27 17:58:49,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:58:49" (1/1) ... [2023-01-27 17:58:49,874 INFO L138 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 83 [2023-01-27 17:58:49,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 17:58:49,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 17:58:49,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 17:58:49,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 17:58:49,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:58:49" (1/1) ... [2023-01-27 17:58:49,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:58:49" (1/1) ... [2023-01-27 17:58:49,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:58:49" (1/1) ... [2023-01-27 17:58:49,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:58:49" (1/1) ... [2023-01-27 17:58:49,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:58:49" (1/1) ... [2023-01-27 17:58:49,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:58:49" (1/1) ... [2023-01-27 17:58:49,919 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:58:49" (1/1) ... [2023-01-27 17:58:49,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:58:49" (1/1) ... [2023-01-27 17:58:49,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 17:58:49,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 17:58:49,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 17:58:49,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 17:58:49,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:58:49" (1/1) ... [2023-01-27 17:58:49,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:58:49,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:58:49,983 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 17:58:50,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 17:58:50,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 17:58:50,062 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-27 17:58:50,062 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-27 17:58:50,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 17:58:50,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 17:58:50,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 17:58:50,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 17:58:50,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 17:58:50,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 17:58:50,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 17:58:50,064 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 17:58:50,219 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 17:58:50,221 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 17:58:50,470 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 17:58:50,542 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 17:58:50,542 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 17:58:50,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:58:50 BoogieIcfgContainer [2023-01-27 17:58:50,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 17:58:50,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 17:58:50,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 17:58:50,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 17:58:50,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 05:58:49" (1/3) ... [2023-01-27 17:58:50,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1944e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:58:50, skipping insertion in model container [2023-01-27 17:58:50,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:58:49" (2/3) ... [2023-01-27 17:58:50,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1944e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:58:50, skipping insertion in model container [2023-01-27 17:58:50,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:58:50" (3/3) ... [2023-01-27 17:58:50,584 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2023-01-27 17:58:50,615 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 17:58:50,615 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 17:58:50,615 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 17:58:50,740 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:58:50,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 73 transitions, 151 flow [2023-01-27 17:58:50,901 INFO L130 PetriNetUnfolder]: 7/83 cut-off events. [2023-01-27 17:58:50,901 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:58:50,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 83 events. 7/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 95 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2023-01-27 17:58:50,906 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 73 transitions, 151 flow [2023-01-27 17:58:50,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 73 transitions, 151 flow [2023-01-27 17:58:50,913 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:58:50,938 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 73 transitions, 151 flow [2023-01-27 17:58:50,940 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 73 transitions, 151 flow [2023-01-27 17:58:50,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 73 transitions, 151 flow [2023-01-27 17:58:50,995 INFO L130 PetriNetUnfolder]: 7/83 cut-off events. [2023-01-27 17:58:50,996 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:58:50,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 83 events. 7/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 95 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2023-01-27 17:58:50,997 INFO L119 LiptonReduction]: Number of co-enabled transitions 1170 [2023-01-27 17:58:52,309 INFO L134 LiptonReduction]: Checked pairs total: 1376 [2023-01-27 17:58:52,310 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-01-27 17:58:52,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:58:52,343 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;@4e7dbe9d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:58:52,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 17:58:52,362 INFO L130 PetriNetUnfolder]: 0/11 cut-off events. [2023-01-27 17:58:52,362 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:58:52,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:58:52,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 17:58:52,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 17:58:52,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:58:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1806875465, now seen corresponding path program 1 times [2023-01-27 17:58:52,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:58:52,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847611138] [2023-01-27 17:58:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:58:52,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:58:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:58:52,568 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:58:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:58:52,635 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:58:52,636 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:58:52,647 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-01-27 17:58:52,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-27 17:58:52,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-27 17:58:52,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 17:58:52,650 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-27 17:58:52,653 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:58:52,654 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 17:58:52,729 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:58:52,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 119 transitions, 250 flow [2023-01-27 17:58:52,787 INFO L130 PetriNetUnfolder]: 13/141 cut-off events. [2023-01-27 17:58:52,787 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:58:52,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 141 events. 13/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 301 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2023-01-27 17:58:52,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 119 transitions, 250 flow [2023-01-27 17:58:52,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 119 transitions, 250 flow [2023-01-27 17:58:52,790 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:58:52,791 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 119 transitions, 250 flow [2023-01-27 17:58:52,791 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 119 transitions, 250 flow [2023-01-27 17:58:52,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 119 transitions, 250 flow [2023-01-27 17:58:52,825 INFO L130 PetriNetUnfolder]: 13/141 cut-off events. [2023-01-27 17:58:52,825 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:58:52,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 141 events. 13/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 301 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2023-01-27 17:58:52,836 INFO L119 LiptonReduction]: Number of co-enabled transitions 6480 [2023-01-27 17:58:54,359 INFO L134 LiptonReduction]: Checked pairs total: 15960 [2023-01-27 17:58:54,360 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-01-27 17:58:54,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:58:54,362 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;@4e7dbe9d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:58:54,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 17:58:54,364 INFO L130 PetriNetUnfolder]: 1/26 cut-off events. [2023-01-27 17:58:54,364 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:58:54,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:58:54,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:58:54,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 17:58:54,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:58:54,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1315754584, now seen corresponding path program 1 times [2023-01-27 17:58:54,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:58:54,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029780115] [2023-01-27 17:58:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:58:54,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:58:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:58:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:58:54,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:58:54,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029780115] [2023-01-27 17:58:54,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029780115] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:58:54,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:58:54,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:58:54,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472193268] [2023-01-27 17:58:54,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:58:54,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:58:54,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:58:54,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:58:54,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:58:54,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 209 [2023-01-27 17:58:54,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:54,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:58:54,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 209 [2023-01-27 17:58:54,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:58:54,821 INFO L130 PetriNetUnfolder]: 377/829 cut-off events. [2023-01-27 17:58:54,822 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2023-01-27 17:58:54,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1516 conditions, 829 events. 377/829 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4652 event pairs, 302 based on Foata normal form. 46/764 useless extension candidates. Maximal degree in co-relation 1126. Up to 587 conditions per place. [2023-01-27 17:58:54,829 INFO L137 encePairwiseOnDemand]: 202/209 looper letters, 34 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-01-27 17:58:54,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 195 flow [2023-01-27 17:58:54,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:58:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:58:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 330 transitions. [2023-01-27 17:58:54,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2023-01-27 17:58:54,865 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 330 transitions. [2023-01-27 17:58:54,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 330 transitions. [2023-01-27 17:58:54,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:58:54,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 330 transitions. [2023-01-27 17:58:54,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.0) internal successors, (330), 3 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) [2023-01-27 17:58:54,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:54,884 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:54,885 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 112 flow. Second operand 3 states and 330 transitions. [2023-01-27 17:58:54,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 195 flow [2023-01-27 17:58:54,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 193 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-27 17:58:54,896 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 98 flow [2023-01-27 17:58:54,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-01-27 17:58:54,900 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-01-27 17:58:54,901 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 98 flow [2023-01-27 17:58:54,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:54,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:58:54,901 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 17:58:54,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 17:58:54,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 17:58:54,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:58:54,917 INFO L85 PathProgramCache]: Analyzing trace with hash 217247913, now seen corresponding path program 1 times [2023-01-27 17:58:54,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:58:54,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647034384] [2023-01-27 17:58:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:58:54,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:58:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:58:54,945 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:58:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:58:54,977 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:58:54,978 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:58:54,978 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 17:58:54,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 17:58:54,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 17:58:54,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 17:58:54,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 17:58:54,978 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:58:54,979 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:58:54,979 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 17:58:55,023 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:58:55,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 165 transitions, 351 flow [2023-01-27 17:58:55,054 INFO L130 PetriNetUnfolder]: 19/199 cut-off events. [2023-01-27 17:58:55,068 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:58:55,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 199 events. 19/199 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 558 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2023-01-27 17:58:55,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 165 transitions, 351 flow [2023-01-27 17:58:55,071 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 165 transitions, 351 flow [2023-01-27 17:58:55,071 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:58:55,071 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 165 transitions, 351 flow [2023-01-27 17:58:55,072 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 165 transitions, 351 flow [2023-01-27 17:58:55,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 165 transitions, 351 flow [2023-01-27 17:58:55,120 INFO L130 PetriNetUnfolder]: 19/199 cut-off events. [2023-01-27 17:58:55,120 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:58:55,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 199 events. 19/199 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 558 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2023-01-27 17:58:55,128 INFO L119 LiptonReduction]: Number of co-enabled transitions 15930 [2023-01-27 17:58:56,846 INFO L134 LiptonReduction]: Checked pairs total: 41600 [2023-01-27 17:58:56,846 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-01-27 17:58:56,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:58:56,850 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;@4e7dbe9d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:58:56,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 17:58:56,852 INFO L130 PetriNetUnfolder]: 1/24 cut-off events. [2023-01-27 17:58:56,852 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:58:56,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:58:56,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:58:56,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 17:58:56,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:58:56,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1049249876, now seen corresponding path program 1 times [2023-01-27 17:58:56,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:58:56,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423192709] [2023-01-27 17:58:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:58:56,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:58:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:58:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:58:56,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:58:56,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423192709] [2023-01-27 17:58:56,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423192709] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:58:56,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:58:56,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:58:56,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179550630] [2023-01-27 17:58:56,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:58:56,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:58:56,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:58:56,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:58:56,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:58:56,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 292 [2023-01-27 17:58:56,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 163 flow. Second operand has 2 states, 2 states have (on average 139.5) internal successors, (279), 2 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) [2023-01-27 17:58:56,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:58:56,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 292 [2023-01-27 17:58:56,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:58:58,956 INFO L130 PetriNetUnfolder]: 9096/14013 cut-off events. [2023-01-27 17:58:58,956 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-01-27 17:58:58,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27507 conditions, 14013 events. 9096/14013 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 93159 event pairs, 8184 based on Foata normal form. 286/12880 useless extension candidates. Maximal degree in co-relation 7544. Up to 12811 conditions per place. [2023-01-27 17:58:59,124 INFO L137 encePairwiseOnDemand]: 284/292 looper letters, 38 selfloop transitions, 0 changer transitions 0/60 dead transitions. [2023-01-27 17:58:59,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 217 flow [2023-01-27 17:58:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:58:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:58:59,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 318 transitions. [2023-01-27 17:58:59,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5445205479452054 [2023-01-27 17:58:59,138 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 318 transitions. [2023-01-27 17:58:59,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 318 transitions. [2023-01-27 17:58:59,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:58:59,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 318 transitions. [2023-01-27 17:58:59,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 159.0) internal successors, (318), 2 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:59,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:59,142 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:59,142 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 163 flow. Second operand 2 states and 318 transitions. [2023-01-27 17:58:59,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 217 flow [2023-01-27 17:58:59,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 211 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-01-27 17:58:59,145 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 135 flow [2023-01-27 17:58:59,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=135, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-01-27 17:58:59,147 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -6 predicate places. [2023-01-27 17:58:59,147 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 135 flow [2023-01-27 17:58:59,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 139.5) internal successors, (279), 2 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) [2023-01-27 17:58:59,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:58:59,147 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 17:58:59,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 17:58:59,147 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)] === [2023-01-27 17:58:59,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:58:59,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1105505255, now seen corresponding path program 1 times [2023-01-27 17:58:59,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:58:59,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328469642] [2023-01-27 17:58:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:58:59,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:58:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:58:59,185 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:58:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:58:59,205 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:58:59,206 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:58:59,206 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 17:58:59,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 17:58:59,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 17:58:59,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 17:58:59,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 17:58:59,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 17:58:59,209 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:58:59,209 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:58:59,209 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 17:58:59,259 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:58:59,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 211 transitions, 454 flow [2023-01-27 17:58:59,296 INFO L130 PetriNetUnfolder]: 25/257 cut-off events. [2023-01-27 17:58:59,296 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:58:59,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 257 events. 25/257 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 815 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 207. Up to 10 conditions per place. [2023-01-27 17:58:59,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 211 transitions, 454 flow [2023-01-27 17:58:59,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 211 transitions, 454 flow [2023-01-27 17:58:59,299 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:58:59,299 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 211 transitions, 454 flow [2023-01-27 17:58:59,312 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 211 transitions, 454 flow [2023-01-27 17:58:59,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 211 transitions, 454 flow [2023-01-27 17:58:59,355 INFO L130 PetriNetUnfolder]: 25/257 cut-off events. [2023-01-27 17:58:59,355 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:58:59,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 257 events. 25/257 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 815 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 207. Up to 10 conditions per place. [2023-01-27 17:58:59,386 INFO L119 LiptonReduction]: Number of co-enabled transitions 29520 [2023-01-27 17:59:01,697 INFO L134 LiptonReduction]: Checked pairs total: 76824 [2023-01-27 17:59:01,697 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-01-27 17:59:01,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:59:01,699 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;@4e7dbe9d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:59:01,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 17:59:01,703 INFO L130 PetriNetUnfolder]: 2/26 cut-off events. [2023-01-27 17:59:01,703 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:59:01,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:59:01,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:59:01,703 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:59:01,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:59:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash -553886399, now seen corresponding path program 1 times [2023-01-27 17:59:01,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:59:01,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26809744] [2023-01-27 17:59:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:59:01,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:59:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:59:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:59:01,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:59:01,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26809744] [2023-01-27 17:59:01,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26809744] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:59:01,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:59:01,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:59:01,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40477411] [2023-01-27 17:59:01,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:59:01,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:59:01,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:59:01,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:59:01,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:59:01,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 369 [2023-01-27 17:59:01,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 216 flow. Second operand has 2 states, 2 states have (on average 176.5) internal successors, (353), 2 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:01,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:59:01,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 369 [2023-01-27 17:59:01,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:59:29,453 INFO L130 PetriNetUnfolder]: 205982/277816 cut-off events. [2023-01-27 17:59:29,460 INFO L131 PetriNetUnfolder]: For 21481/21481 co-relation queries the response was YES. [2023-01-27 17:59:30,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543714 conditions, 277816 events. 205982/277816 cut-off events. For 21481/21481 co-relation queries the response was YES. Maximal size of possible extension queue 7127. Compared 2051546 event pairs, 176370 based on Foata normal form. 4667/244019 useless extension candidates. Maximal degree in co-relation 36069. Up to 254623 conditions per place. [2023-01-27 17:59:32,472 INFO L137 encePairwiseOnDemand]: 362/369 looper letters, 54 selfloop transitions, 0 changer transitions 0/84 dead transitions. [2023-01-27 17:59:32,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 308 flow [2023-01-27 17:59:32,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:59:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:59:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 407 transitions. [2023-01-27 17:59:32,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551490514905149 [2023-01-27 17:59:32,492 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 407 transitions. [2023-01-27 17:59:32,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 407 transitions. [2023-01-27 17:59:32,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:59:32,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 407 transitions. [2023-01-27 17:59:32,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 203.5) internal successors, (407), 2 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) [2023-01-27 17:59:32,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:32,495 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:32,495 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 216 flow. Second operand 2 states and 407 transitions. [2023-01-27 17:59:32,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 308 flow [2023-01-27 17:59:32,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 84 transitions, 296 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-01-27 17:59:32,533 INFO L231 Difference]: Finished difference. Result has 87 places, 84 transitions, 188 flow [2023-01-27 17:59:32,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=188, PETRI_PLACES=87, PETRI_TRANSITIONS=84} [2023-01-27 17:59:32,534 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2023-01-27 17:59:32,534 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 84 transitions, 188 flow [2023-01-27 17:59:32,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 176.5) internal successors, (353), 2 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:32,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:59:32,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:59:32,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 17:59:32,535 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:59:32,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:59:32,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1510413940, now seen corresponding path program 1 times [2023-01-27 17:59:32,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:59:32,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573827166] [2023-01-27 17:59:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:59:32,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:59:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:59:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 17:59:32,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:59:32,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573827166] [2023-01-27 17:59:32,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573827166] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:59:32,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:59:32,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:59:32,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97636888] [2023-01-27 17:59:32,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:59:32,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:59:32,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:59:32,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:59:32,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:59:32,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 369 [2023-01-27 17:59:32,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 84 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 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) [2023-01-27 17:59:32,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:59:32,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 369 [2023-01-27 17:59:32,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:59:58,047 INFO L130 PetriNetUnfolder]: 201122/268807 cut-off events. [2023-01-27 17:59:58,048 INFO L131 PetriNetUnfolder]: For 6040/6040 co-relation queries the response was YES. [2023-01-27 17:59:59,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525610 conditions, 268807 events. 201122/268807 cut-off events. For 6040/6040 co-relation queries the response was YES. Maximal size of possible extension queue 6397. Compared 1947124 event pairs, 161609 based on Foata normal form. 4704/234859 useless extension candidates. Maximal degree in co-relation 525603. Up to 229552 conditions per place. [2023-01-27 18:00:00,591 INFO L137 encePairwiseOnDemand]: 367/369 looper letters, 91 selfloop transitions, 1 changer transitions 0/122 dead transitions. [2023-01-27 18:00:00,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 122 transitions, 458 flow [2023-01-27 18:00:00,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:00,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:00,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 606 transitions. [2023-01-27 18:00:00,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2023-01-27 18:00:00,603 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 606 transitions. [2023-01-27 18:00:00,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 606 transitions. [2023-01-27 18:00:00,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:00,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 606 transitions. [2023-01-27 18:00:00,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.0) internal successors, (606), 3 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) [2023-01-27 18:00:00,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,622 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,622 INFO L175 Difference]: Start difference. First operand has 87 places, 84 transitions, 188 flow. Second operand 3 states and 606 transitions. [2023-01-27 18:00:00,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 122 transitions, 458 flow [2023-01-27 18:00:00,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 122 transitions, 458 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 18:00:00,626 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 188 flow [2023-01-27 18:00:00,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2023-01-27 18:00:00,637 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2023-01-27 18:00:00,637 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 188 flow [2023-01-27 18:00:00,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 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) [2023-01-27 18:00:00,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:00,637 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:00,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 18:00:00,638 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 18:00:00,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:00,638 INFO L85 PathProgramCache]: Analyzing trace with hash -554331704, now seen corresponding path program 1 times [2023-01-27 18:00:00,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:00,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592051514] [2023-01-27 18:00:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:00,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 18:00:00,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:00,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592051514] [2023-01-27 18:00:00,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592051514] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:00,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:00,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:00,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905759522] [2023-01-27 18:00:00,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:00,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:00,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:00,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:00,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:00,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 369 [2023-01-27 18:00:00,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:00,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 369 [2023-01-27 18:00:00,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:29,258 INFO L130 PetriNetUnfolder]: 182360/247750 cut-off events. [2023-01-27 18:00:29,259 INFO L131 PetriNetUnfolder]: For 9910/9910 co-relation queries the response was YES. [2023-01-27 18:00:30,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489047 conditions, 247750 events. 182360/247750 cut-off events. For 9910/9910 co-relation queries the response was YES. Maximal size of possible extension queue 5631. Compared 1837590 event pairs, 148839 based on Foata normal form. 4320/220109 useless extension candidates. Maximal degree in co-relation 489039. Up to 211867 conditions per place. [2023-01-27 18:00:31,381 INFO L137 encePairwiseOnDemand]: 367/369 looper letters, 88 selfloop transitions, 1 changer transitions 0/119 dead transitions. [2023-01-27 18:00:31,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 119 transitions, 445 flow [2023-01-27 18:00:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2023-01-27 18:00:31,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2023-01-27 18:00:31,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2023-01-27 18:00:31,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2023-01-27 18:00:31,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:31,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2023-01-27 18:00:31,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:31,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:31,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:31,397 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 188 flow. Second operand 3 states and 603 transitions. [2023-01-27 18:00:31,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 119 transitions, 445 flow [2023-01-27 18:00:31,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:00:31,414 INFO L231 Difference]: Finished difference. Result has 90 places, 82 transitions, 187 flow [2023-01-27 18:00:31,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=187, PETRI_PLACES=90, PETRI_TRANSITIONS=82} [2023-01-27 18:00:31,416 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -2 predicate places. [2023-01-27 18:00:31,416 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 82 transitions, 187 flow [2023-01-27 18:00:31,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:31,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:31,417 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:31,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 18:00:31,417 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 18:00:31,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:31,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2141982002, now seen corresponding path program 1 times [2023-01-27 18:00:31,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:31,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327238666] [2023-01-27 18:00:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:31,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:00:31,464 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 18:00:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:00:31,484 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 18:00:31,485 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 18:00:31,485 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 18:00:31,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 18:00:31,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-27 18:00:31,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 18:00:31,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 18:00:31,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 18:00:31,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 18:00:31,486 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-01-27 18:00:31,487 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 18:00:31,487 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 18:00:31,535 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 18:00:31,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 257 transitions, 559 flow [2023-01-27 18:00:31,587 INFO L130 PetriNetUnfolder]: 31/315 cut-off events. [2023-01-27 18:00:31,587 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 18:00:31,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 315 events. 31/315 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1058 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 270. Up to 12 conditions per place. [2023-01-27 18:00:31,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 257 transitions, 559 flow [2023-01-27 18:00:31,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 257 transitions, 559 flow [2023-01-27 18:00:31,610 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 18:00:31,610 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 257 transitions, 559 flow [2023-01-27 18:00:31,610 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 257 transitions, 559 flow [2023-01-27 18:00:31,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 257 transitions, 559 flow [2023-01-27 18:00:31,643 INFO L130 PetriNetUnfolder]: 31/315 cut-off events. [2023-01-27 18:00:31,644 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 18:00:31,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 315 events. 31/315 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1058 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 270. Up to 12 conditions per place. [2023-01-27 18:00:31,672 INFO L119 LiptonReduction]: Number of co-enabled transitions 47250 [2023-01-27 18:00:34,072 INFO L134 LiptonReduction]: Checked pairs total: 127905 [2023-01-27 18:00:34,072 INFO L136 LiptonReduction]: Total number of compositions: 197 [2023-01-27 18:00:34,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:00:34,074 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;@4e7dbe9d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:00:34,074 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 18:00:34,075 INFO L130 PetriNetUnfolder]: 2/26 cut-off events. [2023-01-27 18:00:34,076 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 18:00:34,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:34,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:34,076 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 18:00:34,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:34,076 INFO L85 PathProgramCache]: Analyzing trace with hash -165647328, now seen corresponding path program 1 times [2023-01-27 18:00:34,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:34,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089872096] [2023-01-27 18:00:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:34,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 18:00:34,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:34,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089872096] [2023-01-27 18:00:34,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089872096] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:34,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:34,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:34,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821201318] [2023-01-27 18:00:34,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:34,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 18:00:34,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:34,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 18:00:34,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 18:00:34,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 454 [2023-01-27 18:00:34,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 115 transitions, 275 flow. Second operand has 2 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:34,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:34,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 454 [2023-01-27 18:00:34,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand