/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/goblint-regression/28-race_reach_61-invariant_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:18:45,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:18:45,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:18:45,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:18:45,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:18:45,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:18:45,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:18:45,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:18:45,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:18:45,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:18:45,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:18:45,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:18:45,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:18:45,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:18:45,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:18:45,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:18:45,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:18:45,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:18:45,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:18:45,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:18:45,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:18:45,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:18:45,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:18:45,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:18:45,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:18:45,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:18:45,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:18:45,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:18:45,155 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 19:18:45,182 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:18:45,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:18:45,183 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:18:45,183 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:18:45,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:18:45,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:18:45,184 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:18:45,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:18:45,184 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:18:45,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:18:45,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:18:45,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:18:45,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:18:45,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:18:45,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:18:45,185 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:18:45,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:18:45,186 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:18:45,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:18:45,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:18:45,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:18:45,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:18:45,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:18:45,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:18:45,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:18:45,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:18:45,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:18:45,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:18:45,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:18:45,187 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:18:45,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:18:45,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:18:45,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:18:45,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:18:45,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:18:45,412 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:18:45,412 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:18:45,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-01-27 19:18:46,497 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:18:46,681 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:18:46,682 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-01-27 19:18:46,704 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b211f8b1e/2c0056c8a8164e0780628e7f6d1c59db/FLAG62e7e9179 [2023-01-27 19:18:46,713 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b211f8b1e/2c0056c8a8164e0780628e7f6d1c59db [2023-01-27 19:18:46,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:18:46,715 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:18:46,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:18:46,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:18:46,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:18:46,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:18:46" (1/1) ... [2023-01-27 19:18:46,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1808a868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:46, skipping insertion in model container [2023-01-27 19:18:46,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:18:46" (1/1) ... [2023-01-27 19:18:46,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:18:46,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:18:46,936 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2023-01-27 19:18:46,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:18:46,971 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:18:47,013 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2023-01-27 19:18:47,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:18:47,048 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:18:47,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:47 WrapperNode [2023-01-27 19:18:47,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:18:47,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:18:47,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:18:47,050 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:18:47,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:47" (1/1) ... [2023-01-27 19:18:47,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:47" (1/1) ... [2023-01-27 19:18:47,098 INFO L138 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2023-01-27 19:18:47,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:18:47,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:18:47,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:18:47,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:18:47,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:47" (1/1) ... [2023-01-27 19:18:47,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:47" (1/1) ... [2023-01-27 19:18:47,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:47" (1/1) ... [2023-01-27 19:18:47,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:47" (1/1) ... [2023-01-27 19:18:47,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:47" (1/1) ... [2023-01-27 19:18:47,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:47" (1/1) ... [2023-01-27 19:18:47,127 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:47" (1/1) ... [2023-01-27 19:18:47,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:47" (1/1) ... [2023-01-27 19:18:47,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:18:47,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:18:47,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:18:47,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:18:47,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:47" (1/1) ... [2023-01-27 19:18:47,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:18:47,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:18:47,170 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 19:18:47,185 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 19:18:47,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:18:47,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:18:47,197 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:18:47,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:18:47,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:18:47,197 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:18:47,197 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:18:47,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:18:47,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:18:47,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:18:47,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:18:47,199 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 19:18:47,329 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:18:47,330 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:18:47,492 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:18:47,503 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:18:47,503 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-01-27 19:18:47,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:18:47 BoogieIcfgContainer [2023-01-27 19:18:47,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:18:47,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:18:47,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:18:47,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:18:47,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:18:46" (1/3) ... [2023-01-27 19:18:47,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c789a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:18:47, skipping insertion in model container [2023-01-27 19:18:47,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:47" (2/3) ... [2023-01-27 19:18:47,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c789a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:18:47, skipping insertion in model container [2023-01-27 19:18:47,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:18:47" (3/3) ... [2023-01-27 19:18:47,512 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2023-01-27 19:18:47,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:18:47,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:18:47,524 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:18:47,563 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:18:47,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 124 transitions, 256 flow [2023-01-27 19:18:47,646 INFO L130 PetriNetUnfolder]: 30/179 cut-off events. [2023-01-27 19:18:47,646 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:18:47,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 179 events. 30/179 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 522 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-01-27 19:18:47,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 124 transitions, 256 flow [2023-01-27 19:18:47,654 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 119 transitions, 243 flow [2023-01-27 19:18:47,656 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:18:47,662 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 119 transitions, 243 flow [2023-01-27 19:18:47,664 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 119 transitions, 243 flow [2023-01-27 19:18:47,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 119 transitions, 243 flow [2023-01-27 19:18:47,689 INFO L130 PetriNetUnfolder]: 29/174 cut-off events. [2023-01-27 19:18:47,689 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:18:47,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 174 events. 29/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 512 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-01-27 19:18:47,692 INFO L119 LiptonReduction]: Number of co-enabled transitions 3782 [2023-01-27 19:18:49,352 INFO L134 LiptonReduction]: Checked pairs total: 9323 [2023-01-27 19:18:49,353 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-01-27 19:18:49,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:18:49,372 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;@1846fd65, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:18:49,373 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:18:49,380 INFO L130 PetriNetUnfolder]: 3/25 cut-off events. [2023-01-27 19:18:49,380 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:18:49,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:49,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:18:49,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:18:49,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:49,387 INFO L85 PathProgramCache]: Analyzing trace with hash 449238078, now seen corresponding path program 1 times [2023-01-27 19:18:49,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:49,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717612632] [2023-01-27 19:18:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:49,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:18:49,533 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 19:18:49,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:18:49,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717612632] [2023-01-27 19:18:49,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717612632] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:18:49,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:18:49,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:18:49,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107712052] [2023-01-27 19:18:49,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:18:49,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:18:49,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:18:49,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:18:49,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:18:49,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 210 [2023-01-27 19:18:49,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 52 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 19:18:49,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:18:49,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 210 [2023-01-27 19:18:49,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:18:49,648 INFO L130 PetriNetUnfolder]: 141/350 cut-off events. [2023-01-27 19:18:49,648 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:18:49,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 350 events. 141/350 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1471 event pairs, 65 based on Foata normal form. 53/364 useless extension candidates. Maximal degree in co-relation 631. Up to 281 conditions per place. [2023-01-27 19:18:49,651 INFO L137 encePairwiseOnDemand]: 192/210 looper letters, 31 selfloop transitions, 2 changer transitions 4/48 dead transitions. [2023-01-27 19:18:49,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 175 flow [2023-01-27 19:18:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:18:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:18:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2023-01-27 19:18:49,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-01-27 19:18:49,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2023-01-27 19:18:49,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2023-01-27 19:18:49,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:18:49,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2023-01-27 19:18:49,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:18:49,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 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 19:18:49,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 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 19:18:49,671 INFO L175 Difference]: Start difference. First operand has 40 places, 52 transitions, 109 flow. Second operand 3 states and 350 transitions. [2023-01-27 19:18:49,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 175 flow [2023-01-27 19:18:49,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 175 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:18:49,675 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 79 flow [2023-01-27 19:18:49,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-01-27 19:18:49,678 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-01-27 19:18:49,678 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 79 flow [2023-01-27 19:18:49,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 19:18:49,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:49,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:18:49,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:18:49,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:18:49,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:49,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1053724504, now seen corresponding path program 1 times [2023-01-27 19:18:49,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:49,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461090629] [2023-01-27 19:18:49,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:49,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:18:49,698 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:18:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:18:49,721 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:18:49,721 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:18:49,722 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:18:49,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:18:49,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:18:49,724 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:18:49,725 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:18:49,726 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:18:49,740 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:18:49,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 157 transitions, 332 flow [2023-01-27 19:18:49,764 INFO L130 PetriNetUnfolder]: 51/291 cut-off events. [2023-01-27 19:18:49,764 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:18:49,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 291 events. 51/291 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 965 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 181. Up to 9 conditions per place. [2023-01-27 19:18:49,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 157 transitions, 332 flow [2023-01-27 19:18:49,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 157 transitions, 332 flow [2023-01-27 19:18:49,768 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:18:49,768 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 157 transitions, 332 flow [2023-01-27 19:18:49,768 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 157 transitions, 332 flow [2023-01-27 19:18:49,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 157 transitions, 332 flow [2023-01-27 19:18:49,783 INFO L130 PetriNetUnfolder]: 51/291 cut-off events. [2023-01-27 19:18:49,784 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:18:49,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 291 events. 51/291 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 965 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 181. Up to 9 conditions per place. [2023-01-27 19:18:49,790 INFO L119 LiptonReduction]: Number of co-enabled transitions 10168 [2023-01-27 19:18:51,571 INFO L134 LiptonReduction]: Checked pairs total: 31064 [2023-01-27 19:18:51,572 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-01-27 19:18:51,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:18:51,579 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;@1846fd65, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:18:51,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:18:51,581 INFO L130 PetriNetUnfolder]: 3/23 cut-off events. [2023-01-27 19:18:51,581 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:18:51,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:51,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:18:51,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:18:51,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:51,582 INFO L85 PathProgramCache]: Analyzing trace with hash 728669521, now seen corresponding path program 1 times [2023-01-27 19:18:51,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:51,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134980322] [2023-01-27 19:18:51,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:51,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:18:51,651 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 19:18:51,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:18:51,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134980322] [2023-01-27 19:18:51,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134980322] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:18:51,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:18:51,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:18:51,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348537902] [2023-01-27 19:18:51,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:18:51,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:18:51,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:18:51,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:18:51,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:18:51,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 260 [2023-01-27 19:18:51,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 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 19:18:51,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:18:51,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 260 [2023-01-27 19:18:51,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:18:51,967 INFO L130 PetriNetUnfolder]: 2666/4603 cut-off events. [2023-01-27 19:18:51,967 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2023-01-27 19:18:51,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8797 conditions, 4603 events. 2666/4603 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 29685 event pairs, 1116 based on Foata normal form. 1005/5140 useless extension candidates. Maximal degree in co-relation 1325. Up to 4118 conditions per place. [2023-01-27 19:18:51,979 INFO L137 encePairwiseOnDemand]: 237/260 looper letters, 39 selfloop transitions, 2 changer transitions 9/69 dead transitions. [2023-01-27 19:18:51,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 254 flow [2023-01-27 19:18:51,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:18:51,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:18:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-01-27 19:18:51,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2023-01-27 19:18:51,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-01-27 19:18:51,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-01-27 19:18:51,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:18:51,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-01-27 19:18:51,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 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 19:18:51,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 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 19:18:51,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 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 19:18:51,986 INFO L175 Difference]: Start difference. First operand has 60 places, 79 transitions, 176 flow. Second operand 3 states and 442 transitions. [2023-01-27 19:18:51,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 254 flow [2023-01-27 19:18:51,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:18:51,988 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 124 flow [2023-01-27 19:18:51,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2023-01-27 19:18:51,988 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-01-27 19:18:51,988 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 124 flow [2023-01-27 19:18:51,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 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 19:18:51,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:51,989 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:18:51,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:18:51,989 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:18:51,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:51,989 INFO L85 PathProgramCache]: Analyzing trace with hash 964070072, now seen corresponding path program 1 times [2023-01-27 19:18:51,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:51,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558573012] [2023-01-27 19:18:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:51,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:18:52,002 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:18:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:18:52,014 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:18:52,014 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:18:52,014 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:18:52,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:18:52,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 19:18:52,014 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:18:52,015 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:18:52,015 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:18:52,026 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:18:52,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 410 flow [2023-01-27 19:18:52,053 INFO L130 PetriNetUnfolder]: 77/434 cut-off events. [2023-01-27 19:18:52,053 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:18:52,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 434 events. 77/434 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1576 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 299. Up to 16 conditions per place. [2023-01-27 19:18:52,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 190 transitions, 410 flow [2023-01-27 19:18:52,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 190 transitions, 410 flow [2023-01-27 19:18:52,057 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:18:52,057 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 190 transitions, 410 flow [2023-01-27 19:18:52,057 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 190 transitions, 410 flow [2023-01-27 19:18:52,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 410 flow [2023-01-27 19:18:52,082 INFO L130 PetriNetUnfolder]: 77/434 cut-off events. [2023-01-27 19:18:52,082 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:18:52,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 434 events. 77/434 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1576 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 299. Up to 16 conditions per place. [2023-01-27 19:18:52,094 INFO L119 LiptonReduction]: Number of co-enabled transitions 18414 [2023-01-27 19:18:53,868 INFO L134 LiptonReduction]: Checked pairs total: 61724 [2023-01-27 19:18:53,868 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-01-27 19:18:53,869 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:18:53,870 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;@1846fd65, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:18:53,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:18:53,872 INFO L130 PetriNetUnfolder]: 3/22 cut-off events. [2023-01-27 19:18:53,872 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:18:53,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:53,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:18:53,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:18:53,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1053927877, now seen corresponding path program 1 times [2023-01-27 19:18:53,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:53,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360440921] [2023-01-27 19:18:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:53,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:18:53,912 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 19:18:53,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:18:53,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360440921] [2023-01-27 19:18:53,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360440921] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:18:53,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:18:53,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:18:53,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927952161] [2023-01-27 19:18:53,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:18:53,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:18:53,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:18:53,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:18:53,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:18:53,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 308 [2023-01-27 19:18:53,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 102 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 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 19:18:53,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:18:53,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 308 [2023-01-27 19:18:53,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:18:56,526 INFO L130 PetriNetUnfolder]: 30704/45027 cut-off events. [2023-01-27 19:18:56,526 INFO L131 PetriNetUnfolder]: For 793/793 co-relation queries the response was YES. [2023-01-27 19:18:56,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87459 conditions, 45027 events. 30704/45027 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 1268. Compared 327696 event pairs, 24168 based on Foata normal form. 8045/50037 useless extension candidates. Maximal degree in co-relation 13996. Up to 41784 conditions per place. [2023-01-27 19:18:56,795 INFO L137 encePairwiseOnDemand]: 279/308 looper letters, 47 selfloop transitions, 2 changer transitions 10/86 dead transitions. [2023-01-27 19:18:56,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 86 transitions, 318 flow [2023-01-27 19:18:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:18:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:18:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 532 transitions. [2023-01-27 19:18:56,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2023-01-27 19:18:56,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 532 transitions. [2023-01-27 19:18:56,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 532 transitions. [2023-01-27 19:18:56,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:18:56,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 532 transitions. [2023-01-27 19:18:56,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 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 19:18:56,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 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 19:18:56,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 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 19:18:56,801 INFO L175 Difference]: Start difference. First operand has 77 places, 102 transitions, 234 flow. Second operand 3 states and 532 transitions. [2023-01-27 19:18:56,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 86 transitions, 318 flow [2023-01-27 19:18:56,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 86 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:18:56,806 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 165 flow [2023-01-27 19:18:56,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2023-01-27 19:18:56,808 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2023-01-27 19:18:56,810 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 165 flow [2023-01-27 19:18:56,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 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 19:18:56,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:56,810 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:18:56,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:18:56,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:18:56,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:56,811 INFO L85 PathProgramCache]: Analyzing trace with hash 378172606, now seen corresponding path program 1 times [2023-01-27 19:18:56,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:56,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464578750] [2023-01-27 19:18:56,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:56,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:18:56,841 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:18:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:18:56,860 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:18:56,861 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:18:56,861 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:18:56,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:18:56,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:18:56,861 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:18:56,862 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:18:56,862 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:18:56,892 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:18:56,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 223 transitions, 490 flow [2023-01-27 19:18:56,944 INFO L130 PetriNetUnfolder]: 115/641 cut-off events. [2023-01-27 19:18:56,944 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:18:56,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 641 events. 115/641 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2577 event pairs, 6 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 454. Up to 32 conditions per place. [2023-01-27 19:18:56,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 223 transitions, 490 flow [2023-01-27 19:18:56,951 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 223 transitions, 490 flow [2023-01-27 19:18:56,951 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:18:56,952 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 223 transitions, 490 flow [2023-01-27 19:18:56,952 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 223 transitions, 490 flow [2023-01-27 19:18:56,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 223 transitions, 490 flow [2023-01-27 19:18:56,996 INFO L130 PetriNetUnfolder]: 115/641 cut-off events. [2023-01-27 19:18:56,996 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:18:57,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 641 events. 115/641 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2577 event pairs, 6 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 454. Up to 32 conditions per place. [2023-01-27 19:18:57,013 INFO L119 LiptonReduction]: Number of co-enabled transitions 28768 [2023-01-27 19:18:59,316 INFO L134 LiptonReduction]: Checked pairs total: 101367 [2023-01-27 19:18:59,316 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-01-27 19:18:59,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:18:59,321 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;@1846fd65, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:18:59,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:18:59,322 INFO L130 PetriNetUnfolder]: 3/22 cut-off events. [2023-01-27 19:18:59,322 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:18:59,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:59,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:18:59,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:18:59,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:59,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1427958582, now seen corresponding path program 1 times [2023-01-27 19:18:59,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:59,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366311566] [2023-01-27 19:18:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:59,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:18:59,376 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 19:18:59,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:18:59,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366311566] [2023-01-27 19:18:59,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366311566] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:18:59,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:18:59,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:18:59,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917907510] [2023-01-27 19:18:59,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:18:59,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:18:59,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:18:59,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:18:59,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:18:59,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 359 [2023-01-27 19:18:59,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 125 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 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 19:18:59,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:18:59,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 359 [2023-01-27 19:18:59,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:19:48,468 INFO L130 PetriNetUnfolder]: 582315/789247 cut-off events. [2023-01-27 19:19:48,468 INFO L131 PetriNetUnfolder]: For 17980/17980 co-relation queries the response was YES. [2023-01-27 19:19:49,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537518 conditions, 789247 events. 582315/789247 cut-off events. For 17980/17980 co-relation queries the response was YES. Maximal size of possible extension queue 16956. Compared 6366201 event pairs, 387025 based on Foata normal form. 113330/831239 useless extension candidates. Maximal degree in co-relation 149326. Up to 737555 conditions per place. [2023-01-27 19:19:52,087 INFO L137 encePairwiseOnDemand]: 324/359 looper letters, 61 selfloop transitions, 2 changer transitions 11/103 dead transitions. [2023-01-27 19:19:52,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 103 transitions, 396 flow [2023-01-27 19:19:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:19:52,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:19:52,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-01-27 19:19:52,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5831012070566388 [2023-01-27 19:19:52,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-01-27 19:19:52,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-01-27 19:19:52,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:19:52,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-01-27 19:19:52,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 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 19:19:52,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 19:19:52,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 19:19:52,093 INFO L175 Difference]: Start difference. First operand has 94 places, 125 transitions, 294 flow. Second operand 3 states and 628 transitions. [2023-01-27 19:19:52,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 103 transitions, 396 flow [2023-01-27 19:19:52,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 103 transitions, 396 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:19:52,097 INFO L231 Difference]: Finished difference. Result has 97 places, 83 transitions, 208 flow [2023-01-27 19:19:52,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=97, PETRI_TRANSITIONS=83} [2023-01-27 19:19:52,098 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 3 predicate places. [2023-01-27 19:19:52,098 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 83 transitions, 208 flow [2023-01-27 19:19:52,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 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 19:19:52,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:19:52,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:19:52,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 19:19:52,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:19:52,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:19:52,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1693405664, now seen corresponding path program 1 times [2023-01-27 19:19:52,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:19:52,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033875762] [2023-01-27 19:19:52,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:52,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:19:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:19:52,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:19:52,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033875762] [2023-01-27 19:19:52,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033875762] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:19:52,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864966] [2023-01-27 19:19:52,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:52,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:19:52,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:19:52,136 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:19:52,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 19:19:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:52,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:19:52,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:19:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:19:52,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:19:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:19:52,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864966] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:19:52,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:19:52,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:19:52,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731005511] [2023-01-27 19:19:52,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:19:52,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:19:52,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:19:52,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:19:52,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:19:52,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 359 [2023-01-27 19:19:52,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 83 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 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 19:19:52,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:19:52,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 359 [2023-01-27 19:19:52,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:20:23,339 INFO L130 PetriNetUnfolder]: 349033/489472 cut-off events. [2023-01-27 19:20:23,339 INFO L131 PetriNetUnfolder]: For 19475/19475 co-relation queries the response was YES. [2023-01-27 19:20:24,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 952278 conditions, 489472 events. 349033/489472 cut-off events. For 19475/19475 co-relation queries the response was YES. Maximal size of possible extension queue 11890. Compared 4103218 event pairs, 15460 based on Foata normal form. 976/470987 useless extension candidates. Maximal degree in co-relation 736669. Up to 356401 conditions per place. [2023-01-27 19:20:26,629 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 148 selfloop transitions, 6 changer transitions 0/183 dead transitions. [2023-01-27 19:20:26,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 183 transitions, 720 flow [2023-01-27 19:20:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:20:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:20:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1189 transitions. [2023-01-27 19:20:26,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5519962859795728 [2023-01-27 19:20:26,632 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1189 transitions. [2023-01-27 19:20:26,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1189 transitions. [2023-01-27 19:20:26,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:20:26,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1189 transitions. [2023-01-27 19:20:26,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.16666666666666) internal successors, (1189), 6 states have internal predecessors, (1189), 0 states have call successors, (0), 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 19:20:26,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 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 19:20:26,638 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 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 19:20:26,638 INFO L175 Difference]: Start difference. First operand has 97 places, 83 transitions, 208 flow. Second operand 6 states and 1189 transitions. [2023-01-27 19:20:26,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 183 transitions, 720 flow [2023-01-27 19:20:26,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 183 transitions, 706 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:20:26,649 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 234 flow [2023-01-27 19:20:26,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2023-01-27 19:20:26,651 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 4 predicate places. [2023-01-27 19:20:26,653 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 234 flow [2023-01-27 19:20:26,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 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 19:20:26,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:20:26,654 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 19:20:26,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 19:20:26,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:20:26,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:20:26,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:20:26,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1033447836, now seen corresponding path program 1 times [2023-01-27 19:20:26,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:20:26,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660028568] [2023-01-27 19:20:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:26,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:20:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:20:26,893 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:20:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:20:26,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:20:26,903 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:20:26,903 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:20:26,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:20:26,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 19:20:26,904 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:20:26,904 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:20:26,904 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 19:20:26,920 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-27 19:20:26,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 256 transitions, 572 flow [2023-01-27 19:20:26,994 INFO L130 PetriNetUnfolder]: 181/980 cut-off events. [2023-01-27 19:20:26,994 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:20:27,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 980 events. 181/980 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4483 event pairs, 23 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 686. Up to 80 conditions per place. [2023-01-27 19:20:27,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 256 transitions, 572 flow [2023-01-27 19:20:27,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 216 places, 256 transitions, 572 flow [2023-01-27 19:20:27,007 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:20:27,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 216 places, 256 transitions, 572 flow [2023-01-27 19:20:27,007 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 216 places, 256 transitions, 572 flow [2023-01-27 19:20:27,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 256 transitions, 572 flow [2023-01-27 19:20:27,392 INFO L130 PetriNetUnfolder]: 181/980 cut-off events. [2023-01-27 19:20:27,392 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:20:27,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 980 events. 181/980 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4483 event pairs, 23 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 686. Up to 80 conditions per place. [2023-01-27 19:20:27,418 INFO L119 LiptonReduction]: Number of co-enabled transitions 41230 [2023-01-27 19:20:29,530 INFO L134 LiptonReduction]: Checked pairs total: 148905 [2023-01-27 19:20:29,531 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-01-27 19:20:29,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:20:29,533 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;@1846fd65, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:20:29,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:20:29,534 INFO L130 PetriNetUnfolder]: 3/23 cut-off events. [2023-01-27 19:20:29,534 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:20:29,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:20:29,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:20:29,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:20:29,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:20:29,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1848696538, now seen corresponding path program 1 times [2023-01-27 19:20:29,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:20:29,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22566370] [2023-01-27 19:20:29,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:29,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:20:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:29,571 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 19:20:29,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:20:29,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22566370] [2023-01-27 19:20:29,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22566370] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:20:29,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:20:29,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:20:29,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174379251] [2023-01-27 19:20:29,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:20:29,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:20:29,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:20:29,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:20:29,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:20:29,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 408 [2023-01-27 19:20:29,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 148 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 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 19:20:29,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:20:29,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 408 [2023-01-27 19:20:29,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand