/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/14_spin2003.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 17:49:49,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 17:49:49,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 17:49:49,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 17:49:49,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 17:49:49,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 17:49:49,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 17:49:49,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 17:49:49,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 17:49:49,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 17:49:49,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 17:49:49,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 17:49:49,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 17:49:49,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 17:49:49,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 17:49:49,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 17:49:49,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 17:49:49,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 17:49:49,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 17:49:49,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 17:49:49,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 17:49:49,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 17:49:49,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 17:49:49,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 17:49:49,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 17:49:49,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 17:49:49,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 17:49:49,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 17:49:49,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 17:49:49,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 17:49:49,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 17:49:49,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 17:49:49,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 17:49:49,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 17:49:49,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 17:49:49,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 17:49:49,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 17:49:49,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 17:49:49,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 17:49:49,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 17:49:49,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 17:49:49,523 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 17:49:49,541 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 17:49:49,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 17:49:49,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 17:49:49,542 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 17:49:49,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 17:49:49,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 17:49:49,543 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 17:49:49,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 17:49:49,543 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 17:49:49,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 17:49:49,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 17:49:49,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 17:49:49,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 17:49:49,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 17:49:49,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 17:49:49,545 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 17:49:49,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 17:49:49,545 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 17:49:49,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 17:49:49,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 17:49:49,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 17:49:49,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 17:49:49,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 17:49:49,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:49:49,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 17:49:49,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 17:49:49,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 17:49:49,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 17:49:49,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 17:49:49,547 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 17:49:49,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 17:49:49,547 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 17:49:49,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 17:49:49,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 17:49:49,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 17:49:49,788 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 17:49:49,789 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 17:49:49,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-01-27 17:49:50,952 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 17:49:51,165 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 17:49:51,166 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-01-27 17:49:51,180 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2efcad5/378b4579687346de9594ac2cd84789df/FLAG98ffa6b8e [2023-01-27 17:49:51,191 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2efcad5/378b4579687346de9594ac2cd84789df [2023-01-27 17:49:51,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 17:49:51,195 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 17:49:51,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 17:49:51,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 17:49:51,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 17:49:51,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:49:51" (1/1) ... [2023-01-27 17:49:51,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f99d4e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:49:51, skipping insertion in model container [2023-01-27 17:49:51,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:49:51" (1/1) ... [2023-01-27 17:49:51,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 17:49:51,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 17:49:51,508 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/14_spin2003.i[30203,30216] [2023-01-27 17:49:51,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:49:51,530 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 17:49:51,565 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/14_spin2003.i[30203,30216] [2023-01-27 17:49:51,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:49:51,597 INFO L208 MainTranslator]: Completed translation [2023-01-27 17:49:51,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:49:51 WrapperNode [2023-01-27 17:49:51,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 17:49:51,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 17:49:51,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 17:49:51,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 17:49:51,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:49:51" (1/1) ... [2023-01-27 17:49:51,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:49:51" (1/1) ... [2023-01-27 17:49:51,629 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 47 [2023-01-27 17:49:51,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 17:49:51,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 17:49:51,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 17:49:51,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 17:49:51,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:49:51" (1/1) ... [2023-01-27 17:49:51,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:49:51" (1/1) ... [2023-01-27 17:49:51,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:49:51" (1/1) ... [2023-01-27 17:49:51,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:49:51" (1/1) ... [2023-01-27 17:49:51,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:49:51" (1/1) ... [2023-01-27 17:49:51,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:49:51" (1/1) ... [2023-01-27 17:49:51,645 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:49:51" (1/1) ... [2023-01-27 17:49:51,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:49:51" (1/1) ... [2023-01-27 17:49:51,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 17:49:51,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 17:49:51,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 17:49:51,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 17:49:51,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:49:51" (1/1) ... [2023-01-27 17:49:51,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:49:51,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:49:51,678 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 17:49:51,690 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 17:49:51,718 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-27 17:49:51,718 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-27 17:49:51,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 17:49:51,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 17:49:51,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 17:49:51,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 17:49:51,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 17:49:51,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 17:49:51,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 17:49:51,722 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 17:49:51,840 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 17:49:51,842 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 17:49:51,944 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 17:49:52,004 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 17:49:52,004 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-01-27 17:49:52,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:49:52 BoogieIcfgContainer [2023-01-27 17:49:52,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 17:49:52,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 17:49:52,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 17:49:52,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 17:49:52,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 05:49:51" (1/3) ... [2023-01-27 17:49:52,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206c2d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:49:52, skipping insertion in model container [2023-01-27 17:49:52,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:49:51" (2/3) ... [2023-01-27 17:49:52,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206c2d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:49:52, skipping insertion in model container [2023-01-27 17:49:52,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:49:52" (3/3) ... [2023-01-27 17:49:52,023 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2023-01-27 17:49:52,037 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 17:49:52,037 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 17:49:52,037 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 17:49:52,087 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:49:52,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 81 flow [2023-01-27 17:49:52,139 INFO L130 PetriNetUnfolder]: 3/48 cut-off events. [2023-01-27 17:49:52,139 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:49:52,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 48 events. 3/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 63 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 24. Up to 4 conditions per place. [2023-01-27 17:49:52,143 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 38 transitions, 81 flow [2023-01-27 17:49:52,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 81 flow [2023-01-27 17:49:52,151 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:49:52,169 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 39 places, 38 transitions, 81 flow [2023-01-27 17:49:52,172 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 38 transitions, 81 flow [2023-01-27 17:49:52,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 81 flow [2023-01-27 17:49:52,185 INFO L130 PetriNetUnfolder]: 3/48 cut-off events. [2023-01-27 17:49:52,186 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:49:52,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 48 events. 3/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 63 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 24. Up to 4 conditions per place. [2023-01-27 17:49:52,187 INFO L119 LiptonReduction]: Number of co-enabled transitions 312 [2023-01-27 17:49:53,211 INFO L134 LiptonReduction]: Checked pairs total: 276 [2023-01-27 17:49:53,211 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-01-27 17:49:53,223 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:49:53,228 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;@7a97467d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:49:53,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 17:49:53,231 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-01-27 17:49:53,231 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:49:53,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:49:53,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 17:49:53,232 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 17:49:53,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:49:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash 6420180, now seen corresponding path program 1 times [2023-01-27 17:49:53,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:49:53,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820769741] [2023-01-27 17:49:53,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:49:53,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:49:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:49:53,407 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 17:49:53,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:49:53,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820769741] [2023-01-27 17:49:53,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820769741] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:49:53,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:49:53,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:49:53,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350348116] [2023-01-27 17:49:53,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:49:53,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:49:53,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:49:53,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:49:53,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:49:53,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 76 [2023-01-27 17:49:53,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 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 17:49:53,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:49:53,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 76 [2023-01-27 17:49:53,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:49:53,475 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-01-27 17:49:53,475 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:49:53,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-01-27 17:49:53,476 INFO L137 encePairwiseOnDemand]: 74/76 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-01-27 17:49:53,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-01-27 17:49:53,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:49:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:49:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 69 transitions. [2023-01-27 17:49:53,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45394736842105265 [2023-01-27 17:49:53,487 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 69 transitions. [2023-01-27 17:49:53,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 69 transitions. [2023-01-27 17:49:53,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:49:53,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 69 transitions. [2023-01-27 17:49:53,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 0 states have call successors, (0), 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 17:49:53,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 17:49:53,495 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 17:49:53,496 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 69 transitions. [2023-01-27 17:49:53,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-01-27 17:49:53,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:49:53,499 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-01-27 17:49:53,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-01-27 17:49:53,504 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-01-27 17:49:53,504 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-01-27 17:49:53,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 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 17:49:53,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:49:53,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 17:49:53,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 17:49:53,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 17:49:53,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:49:53,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1874808867, now seen corresponding path program 1 times [2023-01-27 17:49:53,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:49:53,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095167240] [2023-01-27 17:49:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:49:53,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:49:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:49:53,544 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:49:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:49:53,581 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:49:53,582 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:49:53,583 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-01-27 17:49:53,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-27 17:49:53,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-27 17:49:53,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 17:49:53,585 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:49:53,587 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:49:53,587 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 17:49:53,600 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:49:53,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions, 114 flow [2023-01-27 17:49:53,625 INFO L130 PetriNetUnfolder]: 5/73 cut-off events. [2023-01-27 17:49:53,628 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:49:53,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 73 events. 5/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-01-27 17:49:53,629 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 51 transitions, 114 flow [2023-01-27 17:49:53,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 51 transitions, 114 flow [2023-01-27 17:49:53,630 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:49:53,630 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions, 114 flow [2023-01-27 17:49:53,631 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 53 places, 51 transitions, 114 flow [2023-01-27 17:49:53,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions, 114 flow [2023-01-27 17:49:53,641 INFO L130 PetriNetUnfolder]: 5/73 cut-off events. [2023-01-27 17:49:53,641 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:49:53,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 73 events. 5/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-01-27 17:49:53,643 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-01-27 17:49:54,401 INFO L134 LiptonReduction]: Checked pairs total: 2481 [2023-01-27 17:49:54,401 INFO L136 LiptonReduction]: Total number of compositions: 35 [2023-01-27 17:49:54,403 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:49:54,404 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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;@7a97467d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:49:54,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 17:49:54,407 INFO L130 PetriNetUnfolder]: 0/11 cut-off events. [2023-01-27 17:49:54,407 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:49:54,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:49:54,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:49:54,407 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 17:49:54,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:49:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1296823008, now seen corresponding path program 1 times [2023-01-27 17:49:54,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:49:54,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767459870] [2023-01-27 17:49:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:49:54,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:49:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:49:54,490 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 17:49:54,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:49:54,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767459870] [2023-01-27 17:49:54,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767459870] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:49:54,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:49:54,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:49:54,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196956399] [2023-01-27 17:49:54,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:49:54,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:49:54,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:49:54,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:49:54,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:49:54,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 86 [2023-01-27 17:49:54,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 17:49:54,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:49:54,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 86 [2023-01-27 17:49:54,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:49:54,554 INFO L130 PetriNetUnfolder]: 117/242 cut-off events. [2023-01-27 17:49:54,554 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 17:49:54,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 242 events. 117/242 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1132 event pairs, 76 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 190. Up to 174 conditions per place. [2023-01-27 17:49:54,557 INFO L137 encePairwiseOnDemand]: 77/86 looper letters, 23 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-01-27 17:49:54,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 31 transitions, 135 flow [2023-01-27 17:49:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:49:54,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:49:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2023-01-27 17:49:54,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2023-01-27 17:49:54,559 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 124 transitions. [2023-01-27 17:49:54,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 124 transitions. [2023-01-27 17:49:54,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:49:54,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 124 transitions. [2023-01-27 17:49:54,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 17:49:54,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 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 17:49:54,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 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 17:49:54,562 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 56 flow. Second operand 3 states and 124 transitions. [2023-01-27 17:49:54,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 31 transitions, 135 flow [2023-01-27 17:49:54,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 31 transitions, 133 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-27 17:49:54,564 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 88 flow [2023-01-27 17:49:54,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-01-27 17:49:54,565 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2023-01-27 17:49:54,565 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 88 flow [2023-01-27 17:49:54,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 17:49:54,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:49:54,565 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 17:49:54,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 17:49:54,566 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 17:49:54,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:49:54,566 INFO L85 PathProgramCache]: Analyzing trace with hash -359606286, now seen corresponding path program 1 times [2023-01-27 17:49:54,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:49:54,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697119616] [2023-01-27 17:49:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:49:54,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:49:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:49:54,582 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:49:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:49:54,592 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:49:54,593 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:49:54,594 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 17:49:54,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 17:49:54,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 17:49:54,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 17:49:54,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 17:49:54,595 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:49:54,595 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:49:54,595 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 17:49:54,614 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:49:54,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 149 flow [2023-01-27 17:49:54,625 INFO L130 PetriNetUnfolder]: 7/98 cut-off events. [2023-01-27 17:49:54,625 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:49:54,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 7/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 178 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 77. Up to 8 conditions per place. [2023-01-27 17:49:54,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 64 transitions, 149 flow [2023-01-27 17:49:54,626 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 64 transitions, 149 flow [2023-01-27 17:49:54,626 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:49:54,626 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 64 transitions, 149 flow [2023-01-27 17:49:54,627 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 64 transitions, 149 flow [2023-01-27 17:49:54,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 149 flow [2023-01-27 17:49:54,634 INFO L130 PetriNetUnfolder]: 7/98 cut-off events. [2023-01-27 17:49:54,634 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:49:54,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 7/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 178 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 77. Up to 8 conditions per place. [2023-01-27 17:49:54,636 INFO L119 LiptonReduction]: Number of co-enabled transitions 1872 [2023-01-27 17:49:55,484 INFO L134 LiptonReduction]: Checked pairs total: 6517 [2023-01-27 17:49:55,484 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-01-27 17:49:55,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:49:55,487 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;@7a97467d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:49:55,487 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 17:49:55,489 INFO L130 PetriNetUnfolder]: 1/14 cut-off events. [2023-01-27 17:49:55,489 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:49:55,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:49:55,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:49:55,490 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 17:49:55,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:49:55,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2064616778, now seen corresponding path program 1 times [2023-01-27 17:49:55,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:49:55,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974340947] [2023-01-27 17:49:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:49:55,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:49:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:49:55,520 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 17:49:55,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:49:55,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974340947] [2023-01-27 17:49:55,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974340947] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:49:55,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:49:55,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:49:55,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417869391] [2023-01-27 17:49:55,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:49:55,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:49:55,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:49:55,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:49:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:49:55,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 108 [2023-01-27 17:49:55,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 17:49:55,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:49:55,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 108 [2023-01-27 17:49:55,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:49:55,777 INFO L130 PetriNetUnfolder]: 1667/2686 cut-off events. [2023-01-27 17:49:55,778 INFO L131 PetriNetUnfolder]: For 376/376 co-relation queries the response was YES. [2023-01-27 17:49:55,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5589 conditions, 2686 events. 1667/2686 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 16222 event pairs, 996 based on Foata normal form. 0/2568 useless extension candidates. Maximal degree in co-relation 774. Up to 1800 conditions per place. [2023-01-27 17:49:55,796 INFO L137 encePairwiseOnDemand]: 94/108 looper letters, 34 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-01-27 17:49:55,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 203 flow [2023-01-27 17:49:55,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:49:55,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:49:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2023-01-27 17:49:55,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2023-01-27 17:49:55,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2023-01-27 17:49:55,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2023-01-27 17:49:55,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:49:55,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2023-01-27 17:49:55,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 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 17:49:55,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 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 17:49:55,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 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 17:49:55,808 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 87 flow. Second operand 3 states and 154 transitions. [2023-01-27 17:49:55,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 203 flow [2023-01-27 17:49:55,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 195 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-01-27 17:49:55,812 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 125 flow [2023-01-27 17:49:55,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-01-27 17:49:55,814 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-01-27 17:49:55,814 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 125 flow [2023-01-27 17:49:55,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 17:49:55,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:49:55,815 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:49:55,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 17:49:55,817 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 17:49:55,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:49:55,817 INFO L85 PathProgramCache]: Analyzing trace with hash -61043069, now seen corresponding path program 1 times [2023-01-27 17:49:55,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:49:55,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954310420] [2023-01-27 17:49:55,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:49:55,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:49:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:49:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:49:55,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:49:55,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954310420] [2023-01-27 17:49:55,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954310420] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:49:55,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:49:55,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:49:55,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960329918] [2023-01-27 17:49:55,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:49:55,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:49:55,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:49:55,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:49:55,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:49:55,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 108 [2023-01-27 17:49:55,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 17:49:55,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:49:55,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 108 [2023-01-27 17:49:55,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:49:55,966 INFO L130 PetriNetUnfolder]: 49/233 cut-off events. [2023-01-27 17:49:55,966 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2023-01-27 17:49:55,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 233 events. 49/233 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1138 event pairs, 27 based on Foata normal form. 28/256 useless extension candidates. Maximal degree in co-relation 311. Up to 58 conditions per place. [2023-01-27 17:49:55,968 INFO L137 encePairwiseOnDemand]: 102/108 looper letters, 8 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2023-01-27 17:49:55,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 26 transitions, 133 flow [2023-01-27 17:49:55,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:49:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:49:55,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-01-27 17:49:55,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783950617283951 [2023-01-27 17:49:55,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-01-27 17:49:55,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-01-27 17:49:55,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:49:55,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-01-27 17:49:55,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 17:49:55,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 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 17:49:55,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 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 17:49:55,973 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 125 flow. Second operand 3 states and 155 transitions. [2023-01-27 17:49:55,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 26 transitions, 133 flow [2023-01-27 17:49:55,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 17:49:55,976 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 73 flow [2023-01-27 17:49:55,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-01-27 17:49:55,979 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-01-27 17:49:55,979 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 73 flow [2023-01-27 17:49:55,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 17:49:55,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:49:55,980 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 17:49:55,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 17:49:55,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 17:49:55,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:49:55,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1070778839, now seen corresponding path program 1 times [2023-01-27 17:49:55,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:49:55,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677369751] [2023-01-27 17:49:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:49:55,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:49:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:49:55,994 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:49:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:49:56,008 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:49:56,008 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:49:56,008 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 17:49:56,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 17:49:56,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 17:49:56,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 17:49:56,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 17:49:56,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 17:49:56,009 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 17:49:56,010 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:49:56,010 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 17:49:56,033 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:49:56,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 77 transitions, 186 flow [2023-01-27 17:49:56,049 INFO L130 PetriNetUnfolder]: 9/123 cut-off events. [2023-01-27 17:49:56,049 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:49:56,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 123 events. 9/123 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 224 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-01-27 17:49:56,050 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 77 transitions, 186 flow [2023-01-27 17:49:56,051 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 77 transitions, 186 flow [2023-01-27 17:49:56,051 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:49:56,051 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 77 transitions, 186 flow [2023-01-27 17:49:56,051 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 77 transitions, 186 flow [2023-01-27 17:49:56,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 77 transitions, 186 flow [2023-01-27 17:49:56,061 INFO L130 PetriNetUnfolder]: 9/123 cut-off events. [2023-01-27 17:49:56,061 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:49:56,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 123 events. 9/123 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 224 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-01-27 17:49:56,067 INFO L119 LiptonReduction]: Number of co-enabled transitions 3120 [2023-01-27 17:49:56,978 INFO L134 LiptonReduction]: Checked pairs total: 11569 [2023-01-27 17:49:56,978 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-01-27 17:49:56,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:49:56,981 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;@7a97467d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:49:56,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 17:49:56,982 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2023-01-27 17:49:56,983 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:49:56,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:49:56,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:49:56,983 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 17:49:56,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:49:56,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1726470574, now seen corresponding path program 1 times [2023-01-27 17:49:56,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:49:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013507493] [2023-01-27 17:49:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:49:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:49:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:49:57,008 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 17:49:57,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:49:57,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013507493] [2023-01-27 17:49:57,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013507493] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:49:57,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:49:57,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:49:57,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3367313] [2023-01-27 17:49:57,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:49:57,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:49:57,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:49:57,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:49:57,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:49:57,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 128 [2023-01-27 17:49:57,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 17:49:57,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:49:57,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 128 [2023-01-27 17:49:57,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:49:59,390 INFO L130 PetriNetUnfolder]: 20839/29905 cut-off events. [2023-01-27 17:49:59,390 INFO L131 PetriNetUnfolder]: For 6083/6083 co-relation queries the response was YES. [2023-01-27 17:49:59,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62504 conditions, 29905 events. 20839/29905 cut-off events. For 6083/6083 co-relation queries the response was YES. Maximal size of possible extension queue 1733. Compared 208081 event pairs, 12105 based on Foata normal form. 912/29041 useless extension candidates. Maximal degree in co-relation 5966. Up to 18751 conditions per place. [2023-01-27 17:49:59,645 INFO L137 encePairwiseOnDemand]: 109/128 looper letters, 46 selfloop transitions, 9 changer transitions 0/58 dead transitions. [2023-01-27 17:49:59,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 279 flow [2023-01-27 17:49:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:49:59,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:49:59,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-01-27 17:49:59,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-01-27 17:49:59,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-01-27 17:49:59,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-01-27 17:49:59,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:49:59,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-01-27 17:49:59,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 17:49:59,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 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 17:49:59,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 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 17:49:59,650 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 116 flow. Second operand 3 states and 184 transitions. [2023-01-27 17:49:59,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 279 flow [2023-01-27 17:49:59,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 261 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-01-27 17:49:59,658 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 166 flow [2023-01-27 17:49:59,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-01-27 17:49:59,659 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-01-27 17:49:59,659 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 166 flow [2023-01-27 17:49:59,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 17:49:59,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:49:59,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:49:59,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 17:49:59,660 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 17:49:59,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:49:59,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1862175219, now seen corresponding path program 1 times [2023-01-27 17:49:59,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:49:59,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525092281] [2023-01-27 17:49:59,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:49:59,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:49:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:49:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:49:59,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:49:59,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525092281] [2023-01-27 17:49:59,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525092281] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:49:59,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:49:59,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:49:59,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040020606] [2023-01-27 17:49:59,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:49:59,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:49:59,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:49:59,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:49:59,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:49:59,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 128 [2023-01-27 17:49:59,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 17:49:59,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:49:59,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 128 [2023-01-27 17:49:59,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:49:59,792 INFO L130 PetriNetUnfolder]: 149/641 cut-off events. [2023-01-27 17:49:59,792 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2023-01-27 17:49:59,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 641 events. 149/641 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4263 event pairs, 83 based on Foata normal form. 124/748 useless extension candidates. Maximal degree in co-relation 879. Up to 164 conditions per place. [2023-01-27 17:49:59,795 INFO L137 encePairwiseOnDemand]: 120/128 looper letters, 10 selfloop transitions, 8 changer transitions 0/33 dead transitions. [2023-01-27 17:49:59,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 173 flow [2023-01-27 17:49:59,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:49:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:49:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-01-27 17:49:59,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-01-27 17:49:59,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-01-27 17:49:59,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-01-27 17:49:59,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:49:59,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-01-27 17:49:59,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 17:49:59,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 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 17:49:59,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 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 17:49:59,798 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 166 flow. Second operand 3 states and 184 transitions. [2023-01-27 17:49:59,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 173 flow [2023-01-27 17:49:59,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 17:49:59,802 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 94 flow [2023-01-27 17:49:59,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-01-27 17:49:59,804 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -7 predicate places. [2023-01-27 17:49:59,804 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 94 flow [2023-01-27 17:49:59,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 17:49:59,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:49:59,804 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 17:49:59,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 17:49:59,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:49:59,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:49:59,805 INFO L85 PathProgramCache]: Analyzing trace with hash -256467015, now seen corresponding path program 1 times [2023-01-27 17:49:59,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:49:59,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107746686] [2023-01-27 17:49:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:49:59,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:49:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:49:59,824 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:49:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:49:59,842 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:49:59,843 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:49:59,845 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 17:49:59,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 17:49:59,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-27 17:49:59,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 17:49:59,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 17:49:59,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 17:49:59,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 17:49:59,847 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 17:49:59,848 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:49:59,848 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 17:49:59,867 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:49:59,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 90 transitions, 225 flow [2023-01-27 17:49:59,883 INFO L130 PetriNetUnfolder]: 11/148 cut-off events. [2023-01-27 17:49:59,884 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 17:49:59,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 148 events. 11/148 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 281 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 136. Up to 12 conditions per place. [2023-01-27 17:49:59,884 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 90 transitions, 225 flow [2023-01-27 17:49:59,885 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 90 transitions, 225 flow [2023-01-27 17:49:59,885 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:49:59,885 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 90 transitions, 225 flow [2023-01-27 17:49:59,885 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 90 transitions, 225 flow [2023-01-27 17:49:59,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 90 transitions, 225 flow [2023-01-27 17:49:59,894 INFO L130 PetriNetUnfolder]: 11/148 cut-off events. [2023-01-27 17:49:59,894 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 17:49:59,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 148 events. 11/148 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 281 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 136. Up to 12 conditions per place. [2023-01-27 17:49:59,898 INFO L119 LiptonReduction]: Number of co-enabled transitions 4680 [2023-01-27 17:50:00,926 INFO L134 LiptonReduction]: Checked pairs total: 18397 [2023-01-27 17:50:00,926 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-01-27 17:50:00,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:50:00,928 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;@7a97467d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:50:00,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 17:50:00,930 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2023-01-27 17:50:00,930 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:50:00,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:50:00,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:50:00,930 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 17:50:00,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:50:00,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1920413755, now seen corresponding path program 1 times [2023-01-27 17:50:00,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:50:00,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049128928] [2023-01-27 17:50:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:50:00,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:50:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:50:00,947 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 17:50:00,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:50:00,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049128928] [2023-01-27 17:50:00,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049128928] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:50:00,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:50:00,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:50:00,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353960446] [2023-01-27 17:50:00,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:50:00,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:50:00,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:50:00,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:50:00,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:50:00,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 150 [2023-01-27 17:50:00,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 17:50:00,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:50:00,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 150 [2023-01-27 17:50:00,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:50:16,691 INFO L130 PetriNetUnfolder]: 189321/251344 cut-off events. [2023-01-27 17:50:16,692 INFO L131 PetriNetUnfolder]: For 67150/67150 co-relation queries the response was YES. [2023-01-27 17:50:17,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527099 conditions, 251344 events. 189321/251344 cut-off events. For 67150/67150 co-relation queries the response was YES. Maximal size of possible extension queue 10541. Compared 1802561 event pairs, 106256 based on Foata normal form. 0/236979 useless extension candidates. Maximal degree in co-relation 57177. Up to 150074 conditions per place. [2023-01-27 17:50:18,611 INFO L137 encePairwiseOnDemand]: 128/150 looper letters, 56 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2023-01-27 17:50:18,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 351 flow [2023-01-27 17:50:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:50:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:50:18,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2023-01-27 17:50:18,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-01-27 17:50:18,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2023-01-27 17:50:18,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2023-01-27 17:50:18,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:50:18,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2023-01-27 17:50:18,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 17:50:18,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 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 17:50:18,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 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 17:50:18,619 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 147 flow. Second operand 3 states and 210 transitions. [2023-01-27 17:50:18,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 351 flow [2023-01-27 17:50:18,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 319 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-01-27 17:50:18,769 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 199 flow [2023-01-27 17:50:18,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-01-27 17:50:18,769 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-01-27 17:50:18,770 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 199 flow [2023-01-27 17:50:18,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 17:50:18,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:50:18,770 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:50:18,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 17:50:18,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 17:50:18,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:50:18,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1573246126, now seen corresponding path program 1 times [2023-01-27 17:50:18,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:50:18,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534282995] [2023-01-27 17:50:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:50:18,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:50:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:50:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:50:18,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:50:18,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534282995] [2023-01-27 17:50:18,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534282995] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:50:18,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:50:18,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:50:18,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472769828] [2023-01-27 17:50:18,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:50:18,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:50:18,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:50:18,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:50:18,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:50:18,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 150 [2023-01-27 17:50:18,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 17:50:18,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:50:18,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 150 [2023-01-27 17:50:18,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:50:18,970 INFO L130 PetriNetUnfolder]: 405/1641 cut-off events. [2023-01-27 17:50:18,971 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2023-01-27 17:50:18,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3728 conditions, 1641 events. 405/1641 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13505 event pairs, 227 based on Foata normal form. 444/2036 useless extension candidates. Maximal degree in co-relation 2227. Up to 436 conditions per place. [2023-01-27 17:50:18,977 INFO L137 encePairwiseOnDemand]: 140/150 looper letters, 12 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-01-27 17:50:18,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 213 flow [2023-01-27 17:50:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:50:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:50:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-01-27 17:50:18,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2023-01-27 17:50:18,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-01-27 17:50:18,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-01-27 17:50:18,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:50:18,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-01-27 17:50:18,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 17:50:18,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 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 17:50:18,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 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 17:50:18,985 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 199 flow. Second operand 3 states and 213 transitions. [2023-01-27 17:50:18,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 213 flow [2023-01-27 17:50:18,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 40 transitions, 169 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 17:50:18,990 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 115 flow [2023-01-27 17:50:18,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-01-27 17:50:18,992 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-01-27 17:50:18,992 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 115 flow [2023-01-27 17:50:18,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 17:50:18,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:50:18,992 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:50:18,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-27 17:50:18,992 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 17:50:18,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:50:18,993 INFO L85 PathProgramCache]: Analyzing trace with hash 42929866, now seen corresponding path program 1 times [2023-01-27 17:50:18,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:50:18,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751967962] [2023-01-27 17:50:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:50:18,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:50:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:50:19,006 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:50:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:50:19,015 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:50:19,015 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:50:19,015 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-01-27 17:50:19,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-01-27 17:50:19,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-01-27 17:50:19,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-01-27 17:50:19,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-01-27 17:50:19,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-01-27 17:50:19,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-01-27 17:50:19,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-27 17:50:19,016 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 17:50:19,017 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:50:19,017 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-01-27 17:50:19,038 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:50:19,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 103 transitions, 266 flow [2023-01-27 17:50:19,051 INFO L130 PetriNetUnfolder]: 13/173 cut-off events. [2023-01-27 17:50:19,051 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-27 17:50:19,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 173 events. 13/173 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 335 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 169. Up to 14 conditions per place. [2023-01-27 17:50:19,052 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 103 transitions, 266 flow [2023-01-27 17:50:19,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 103 transitions, 266 flow [2023-01-27 17:50:19,053 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:50:19,053 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 103 transitions, 266 flow [2023-01-27 17:50:19,053 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 103 transitions, 266 flow [2023-01-27 17:50:19,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 103 transitions, 266 flow [2023-01-27 17:50:19,064 INFO L130 PetriNetUnfolder]: 13/173 cut-off events. [2023-01-27 17:50:19,064 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-27 17:50:19,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 173 events. 13/173 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 335 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 169. Up to 14 conditions per place. [2023-01-27 17:50:19,068 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-01-27 17:50:20,191 INFO L134 LiptonReduction]: Checked pairs total: 25062 [2023-01-27 17:50:20,191 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-01-27 17:50:20,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:50:20,193 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;@7a97467d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:50:20,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-01-27 17:50:20,194 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2023-01-27 17:50:20,194 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:50:20,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:50:20,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:50:20,195 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 17:50:20,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:50:20,195 INFO L85 PathProgramCache]: Analyzing trace with hash 203021318, now seen corresponding path program 1 times [2023-01-27 17:50:20,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:50:20,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61375074] [2023-01-27 17:50:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:50:20,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:50:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:50:20,212 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 17:50:20,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:50:20,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61375074] [2023-01-27 17:50:20,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61375074] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:50:20,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:50:20,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:50:20,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519568535] [2023-01-27 17:50:20,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:50:20,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:50:20,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:50:20,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:50:20,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:50:20,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 168 [2023-01-27 17:50:20,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 17:50:20,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:50:20,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 168 [2023-01-27 17:50:20,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand