/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_37-indirect_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:15:40,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:15:40,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:15:40,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:15:40,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:15:40,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:15:40,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:15:40,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:15:40,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:15:40,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:15:40,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:15:40,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:15:40,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:15:40,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:15:40,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:15:40,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:15:40,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:15:40,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:15:40,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:15:40,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:15:40,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:15:40,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:15:40,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:15:40,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:15:40,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:15:40,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:15:40,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:15:40,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:15:40,245 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 19:15:40,267 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:15:40,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:15:40,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:15:40,268 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:15:40,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:15:40,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:15:40,269 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:15:40,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:15:40,269 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:15:40,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:15:40,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:15:40,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:15:40,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:15:40,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:15:40,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:15:40,270 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:15:40,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:15:40,271 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:15:40,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:15:40,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:15:40,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:15:40,271 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:15:40,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:15:40,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:15:40,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:15:40,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:15:40,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:15:40,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:15:40,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:15:40,272 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:15:40,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:15:40,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:15:40,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:15:40,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:15:40,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:15:40,496 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:15:40,496 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:15:40,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-01-27 19:15:41,028 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:15:42,183 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:15:42,184 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-01-27 19:15:42,192 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f682065c/e1493e7bea004780983d61abf4e1ee0b/FLAGc7cc5bd90 [2023-01-27 19:15:42,206 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f682065c/e1493e7bea004780983d61abf4e1ee0b [2023-01-27 19:15:42,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:15:42,209 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:15:42,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:15:42,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:15:42,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:15:42,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:15:42" (1/1) ... [2023-01-27 19:15:42,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74f070f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:15:42, skipping insertion in model container [2023-01-27 19:15:42,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:15:42" (1/1) ... [2023-01-27 19:15:42,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:15:42,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:15:42,544 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_37-indirect_racing.i[30176,30189] [2023-01-27 19:15:42,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:15:42,574 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:15:42,604 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_37-indirect_racing.i[30176,30189] [2023-01-27 19:15:42,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:15:42,631 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:15:42,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:15:42 WrapperNode [2023-01-27 19:15:42,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:15:42,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:15:42,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:15:42,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:15:42,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:15:42" (1/1) ... [2023-01-27 19:15:42,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:15:42" (1/1) ... [2023-01-27 19:15:42,675 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2023-01-27 19:15:42,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:15:42,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:15:42,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:15:42,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:15:42,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:15:42" (1/1) ... [2023-01-27 19:15:42,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:15:42" (1/1) ... [2023-01-27 19:15:42,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:15:42" (1/1) ... [2023-01-27 19:15:42,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:15:42" (1/1) ... [2023-01-27 19:15:42,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:15:42" (1/1) ... [2023-01-27 19:15:42,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:15:42" (1/1) ... [2023-01-27 19:15:42,691 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:15:42" (1/1) ... [2023-01-27 19:15:42,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:15:42" (1/1) ... [2023-01-27 19:15:42,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:15:42,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:15:42,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:15:42,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:15:42,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:15:42" (1/1) ... [2023-01-27 19:15:42,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:15:42,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:15:42,731 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 19:15:42,734 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 19:15:42,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:15:42,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:15:42,766 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:15:42,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:15:42,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:15:42,767 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:15:42,767 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:15:42,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:15:42,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:15:42,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:15:42,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:15:42,768 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 19:15:42,867 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:15:42,868 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:15:43,042 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:15:43,047 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:15:43,047 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-01-27 19:15:43,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:15:43 BoogieIcfgContainer [2023-01-27 19:15:43,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:15:43,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:15:43,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:15:43,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:15:43,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:15:42" (1/3) ... [2023-01-27 19:15:43,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14497dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:15:43, skipping insertion in model container [2023-01-27 19:15:43,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:15:42" (2/3) ... [2023-01-27 19:15:43,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14497dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:15:43, skipping insertion in model container [2023-01-27 19:15:43,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:15:43" (3/3) ... [2023-01-27 19:15:43,054 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2023-01-27 19:15:43,066 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:15:43,066 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:15:43,066 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:15:43,126 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:15:43,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 108 transitions, 224 flow [2023-01-27 19:15:43,192 INFO L130 PetriNetUnfolder]: 17/140 cut-off events. [2023-01-27 19:15:43,192 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:15:43,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 140 events. 17/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 338 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 69. Up to 6 conditions per place. [2023-01-27 19:15:43,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 108 transitions, 224 flow [2023-01-27 19:15:43,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 103 transitions, 211 flow [2023-01-27 19:15:43,217 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:15:43,224 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 103 transitions, 211 flow [2023-01-27 19:15:43,226 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 103 transitions, 211 flow [2023-01-27 19:15:43,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 103 transitions, 211 flow [2023-01-27 19:15:43,249 INFO L130 PetriNetUnfolder]: 16/135 cut-off events. [2023-01-27 19:15:43,249 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:15:43,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 135 events. 16/135 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 317 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 69. Up to 6 conditions per place. [2023-01-27 19:15:43,251 INFO L119 LiptonReduction]: Number of co-enabled transitions 2432 [2023-01-27 19:15:45,517 INFO L134 LiptonReduction]: Checked pairs total: 4247 [2023-01-27 19:15:45,517 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-01-27 19:15:45,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:15:45,540 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;@da96fb7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:15:45,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:15:45,548 INFO L130 PetriNetUnfolder]: 0/9 cut-off events. [2023-01-27 19:15:45,548 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:15:45,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:15:45,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:15:45,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:15:45,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:15:45,556 INFO L85 PathProgramCache]: Analyzing trace with hash 12765249, now seen corresponding path program 1 times [2023-01-27 19:15:45,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:15:45,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32039074] [2023-01-27 19:15:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:15:45,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:15:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:15:45,762 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 19:15:45,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:15:45,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32039074] [2023-01-27 19:15:45,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32039074] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:15:45,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:15:45,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:15:45,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321919394] [2023-01-27 19:15:45,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:15:45,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:15:45,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:15:45,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:15:45,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:15:45,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 193 [2023-01-27 19:15:45,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 31 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 19:15:45,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:15:45,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 193 [2023-01-27 19:15:45,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:15:45,889 INFO L130 PetriNetUnfolder]: 90/214 cut-off events. [2023-01-27 19:15:45,889 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:15:45,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 214 events. 90/214 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 899 event pairs, 0 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 399. Up to 190 conditions per place. [2023-01-27 19:15:45,891 INFO L137 encePairwiseOnDemand]: 182/193 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2023-01-27 19:15:45,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 137 flow [2023-01-27 19:15:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:15:45,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:15:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2023-01-27 19:15:45,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.531951640759931 [2023-01-27 19:15:45,910 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2023-01-27 19:15:45,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2023-01-27 19:15:45,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:15:45,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2023-01-27 19:15:45,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 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 19:15:45,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 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 19:15:45,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 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 19:15:45,927 INFO L175 Difference]: Start difference. First operand has 26 places, 31 transitions, 67 flow. Second operand 3 states and 308 transitions. [2023-01-27 19:15:45,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 137 flow [2023-01-27 19:15:45,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:15:45,931 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 51 flow [2023-01-27 19:15:45,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-01-27 19:15:45,936 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-01-27 19:15:45,937 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 51 flow [2023-01-27 19:15:45,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 19:15:45,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:15:45,937 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:15:45,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:15:45,937 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:15:45,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:15:45,939 INFO L85 PathProgramCache]: Analyzing trace with hash -598310129, now seen corresponding path program 1 times [2023-01-27 19:15:45,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:15:45,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859970258] [2023-01-27 19:15:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:15:45,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:15:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:15:45,985 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:15:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:15:46,039 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:15:46,040 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:15:46,041 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:15:46,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:15:46,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:15:46,046 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:15:46,048 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:15:46,049 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:15:46,074 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:15:46,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 142 transitions, 302 flow [2023-01-27 19:15:46,103 INFO L130 PetriNetUnfolder]: 31/230 cut-off events. [2023-01-27 19:15:46,104 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:15:46,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 230 events. 31/230 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 677 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-01-27 19:15:46,108 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 142 transitions, 302 flow [2023-01-27 19:15:46,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 142 transitions, 302 flow [2023-01-27 19:15:46,110 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:15:46,110 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 142 transitions, 302 flow [2023-01-27 19:15:46,110 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 142 transitions, 302 flow [2023-01-27 19:15:46,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 142 transitions, 302 flow [2023-01-27 19:15:46,130 INFO L130 PetriNetUnfolder]: 31/230 cut-off events. [2023-01-27 19:15:46,130 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:15:46,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 230 events. 31/230 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 677 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-01-27 19:15:46,135 INFO L119 LiptonReduction]: Number of co-enabled transitions 7616 [2023-01-27 19:15:48,871 INFO L134 LiptonReduction]: Checked pairs total: 15436 [2023-01-27 19:15:48,871 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-01-27 19:15:48,873 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:15:48,874 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;@da96fb7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:15:48,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:15:48,876 INFO L130 PetriNetUnfolder]: 0/10 cut-off events. [2023-01-27 19:15:48,876 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:15:48,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:15:48,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:15:48,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:15:48,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:15:48,877 INFO L85 PathProgramCache]: Analyzing trace with hash 21408550, now seen corresponding path program 1 times [2023-01-27 19:15:48,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:15:48,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415160979] [2023-01-27 19:15:48,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:15:48,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:15:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:15:48,916 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 19:15:48,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:15:48,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415160979] [2023-01-27 19:15:48,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415160979] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:15:48,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:15:48,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:15:48,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784472441] [2023-01-27 19:15:48,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:15:48,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:15:48,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:15:48,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:15:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:15:48,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 247 [2023-01-27 19:15:48,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 54 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 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 19:15:48,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:15:48,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 247 [2023-01-27 19:15:48,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:15:49,150 INFO L130 PetriNetUnfolder]: 1490/2698 cut-off events. [2023-01-27 19:15:49,150 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:15:49,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5210 conditions, 2698 events. 1490/2698 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 15950 event pairs, 680 based on Foata normal form. 390/2790 useless extension candidates. Maximal degree in co-relation 536. Up to 2431 conditions per place. [2023-01-27 19:15:49,159 INFO L137 encePairwiseOnDemand]: 230/247 looper letters, 32 selfloop transitions, 2 changer transitions 8/50 dead transitions. [2023-01-27 19:15:49,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 200 flow [2023-01-27 19:15:49,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:15:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:15:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2023-01-27 19:15:49,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5411605937921727 [2023-01-27 19:15:49,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2023-01-27 19:15:49,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2023-01-27 19:15:49,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:15:49,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2023-01-27 19:15:49,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 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 19:15:49,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 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 19:15:49,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 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 19:15:49,166 INFO L175 Difference]: Start difference. First operand has 43 places, 54 transitions, 126 flow. Second operand 3 states and 401 transitions. [2023-01-27 19:15:49,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 200 flow [2023-01-27 19:15:49,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 200 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:15:49,169 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 88 flow [2023-01-27 19:15:49,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2023-01-27 19:15:49,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-01-27 19:15:49,170 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 88 flow [2023-01-27 19:15:49,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 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 19:15:49,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:15:49,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:15:49,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:15:49,171 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:15:49,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:15:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1932892046, now seen corresponding path program 1 times [2023-01-27 19:15:49,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:15:49,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234983910] [2023-01-27 19:15:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:15:49,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:15:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:15:49,249 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 19:15:49,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:15:49,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234983910] [2023-01-27 19:15:49,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234983910] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:15:49,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261448622] [2023-01-27 19:15:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:15:49,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:15:49,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:15:49,253 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 19:15:49,312 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 19:15:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:15:49,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:15:49,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:15:49,397 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 19:15:49,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:15:49,413 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 19:15:49,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261448622] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:15:49,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:15:49,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:15:49,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269685422] [2023-01-27 19:15:49,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:15:49,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:15:49,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:15:49,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:15:49,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:15:49,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 247 [2023-01-27 19:15:49,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 115.28571428571429) internal successors, (807), 7 states have internal predecessors, (807), 0 states have call successors, (0), 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 19:15:49,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:15:49,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 247 [2023-01-27 19:15:49,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:15:49,523 INFO L130 PetriNetUnfolder]: 376/769 cut-off events. [2023-01-27 19:15:49,523 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2023-01-27 19:15:49,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 769 events. 376/769 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3930 event pairs, 0 based on Foata normal form. 90/859 useless extension candidates. Maximal degree in co-relation 190. Up to 450 conditions per place. [2023-01-27 19:15:49,527 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-01-27 19:15:49,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 228 flow [2023-01-27 19:15:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:15:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:15:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 615 transitions. [2023-01-27 19:15:49,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4979757085020243 [2023-01-27 19:15:49,529 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 615 transitions. [2023-01-27 19:15:49,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 615 transitions. [2023-01-27 19:15:49,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:15:49,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 615 transitions. [2023-01-27 19:15:49,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:15:49,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 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 19:15:49,533 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 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 19:15:49,533 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 88 flow. Second operand 5 states and 615 transitions. [2023-01-27 19:15:49,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 228 flow [2023-01-27 19:15:49,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:15:49,535 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-01-27 19:15:49,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-01-27 19:15:49,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2023-01-27 19:15:49,536 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-01-27 19:15:49,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 115.28571428571429) internal successors, (807), 7 states have internal predecessors, (807), 0 states have call successors, (0), 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 19:15:49,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:15:49,537 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:15:49,545 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 19:15:49,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:15:49,742 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:15:49,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:15:49,743 INFO L85 PathProgramCache]: Analyzing trace with hash 560708747, now seen corresponding path program 1 times [2023-01-27 19:15:49,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:15:49,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691140772] [2023-01-27 19:15:49,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:15:49,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:15:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:15:49,763 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:15:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:15:49,787 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:15:49,787 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:15:49,787 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:15:49,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:15:49,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:15:49,788 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:15:49,788 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:15:49,788 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:15:49,810 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:15:49,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 176 transitions, 382 flow [2023-01-27 19:15:49,874 INFO L130 PetriNetUnfolder]: 50/351 cut-off events. [2023-01-27 19:15:49,874 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:15:49,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 351 events. 50/351 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1160 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 238. Up to 16 conditions per place. [2023-01-27 19:15:49,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 176 transitions, 382 flow [2023-01-27 19:15:49,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 176 transitions, 382 flow [2023-01-27 19:15:49,878 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:15:49,878 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 176 transitions, 382 flow [2023-01-27 19:15:49,878 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 176 transitions, 382 flow [2023-01-27 19:15:49,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 176 transitions, 382 flow [2023-01-27 19:15:49,905 INFO L130 PetriNetUnfolder]: 50/351 cut-off events. [2023-01-27 19:15:49,905 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:15:49,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 351 events. 50/351 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1160 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 238. Up to 16 conditions per place. [2023-01-27 19:15:49,915 INFO L119 LiptonReduction]: Number of co-enabled transitions 14784 [2023-01-27 19:15:52,356 INFO L134 LiptonReduction]: Checked pairs total: 33194 [2023-01-27 19:15:52,357 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-01-27 19:15:52,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:15:52,394 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;@da96fb7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:15:52,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:15:52,395 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:15:52,395 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:15:52,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:15:52,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:15:52,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:15:52,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:15:52,396 INFO L85 PathProgramCache]: Analyzing trace with hash 31743882, now seen corresponding path program 1 times [2023-01-27 19:15:52,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:15:52,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078634513] [2023-01-27 19:15:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:15:52,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:15:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:15:52,433 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 19:15:52,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:15:52,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078634513] [2023-01-27 19:15:52,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078634513] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:15:52,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:15:52,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:15:52,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093303409] [2023-01-27 19:15:52,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:15:52,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:15:52,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:15:52,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:15:52,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:15:52,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 302 [2023-01-27 19:15:52,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 73 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 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 19:15:52,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:15:52,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 302 [2023-01-27 19:15:52,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:15:54,926 INFO L130 PetriNetUnfolder]: 29423/42563 cut-off events. [2023-01-27 19:15:54,926 INFO L131 PetriNetUnfolder]: For 1321/1321 co-relation queries the response was YES. [2023-01-27 19:15:54,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84837 conditions, 42563 events. 29423/42563 cut-off events. For 1321/1321 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 275603 event pairs, 19125 based on Foata normal form. 4661/43510 useless extension candidates. Maximal degree in co-relation 7443. Up to 41391 conditions per place. [2023-01-27 19:15:55,055 INFO L137 encePairwiseOnDemand]: 279/302 looper letters, 44 selfloop transitions, 2 changer transitions 9/63 dead transitions. [2023-01-27 19:15:55,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 63 transitions, 264 flow [2023-01-27 19:15:55,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:15:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:15:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2023-01-27 19:15:55,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496688741721855 [2023-01-27 19:15:55,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2023-01-27 19:15:55,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2023-01-27 19:15:55,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:15:55,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2023-01-27 19:15:55,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:15:55,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 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 19:15:55,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 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 19:15:55,060 INFO L175 Difference]: Start difference. First operand has 57 places, 73 transitions, 176 flow. Second operand 3 states and 498 transitions. [2023-01-27 19:15:55,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 63 transitions, 264 flow [2023-01-27 19:15:55,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 63 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:15:55,063 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 121 flow [2023-01-27 19:15:55,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2023-01-27 19:15:55,063 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-01-27 19:15:55,063 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 121 flow [2023-01-27 19:15:55,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 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 19:15:55,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:15:55,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:15:55,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:15:55,064 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:15:55,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:15:55,064 INFO L85 PathProgramCache]: Analyzing trace with hash -177504635, now seen corresponding path program 1 times [2023-01-27 19:15:55,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:15:55,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522294955] [2023-01-27 19:15:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:15:55,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:15:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:15:55,100 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 19:15:55,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:15:55,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522294955] [2023-01-27 19:15:55,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522294955] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:15:55,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281447645] [2023-01-27 19:15:55,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:15:55,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:15:55,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:15:55,102 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:15:55,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 19:15:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:15:55,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:15:55,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:15:55,167 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 19:15:55,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:15:55,183 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 19:15:55,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281447645] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:15:55,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:15:55,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-27 19:15:55,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163843410] [2023-01-27 19:15:55,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:15:55,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:15:55,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:15:55,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:15:55,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-27 19:15:55,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 302 [2023-01-27 19:15:55,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 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 19:15:55,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:15:55,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 302 [2023-01-27 19:15:55,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:15:55,978 INFO L130 PetriNetUnfolder]: 7582/12187 cut-off events. [2023-01-27 19:15:55,979 INFO L131 PetriNetUnfolder]: For 4374/4374 co-relation queries the response was YES. [2023-01-27 19:15:55,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27575 conditions, 12187 events. 7582/12187 cut-off events. For 4374/4374 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 81057 event pairs, 0 based on Foata normal form. 1098/13285 useless extension candidates. Maximal degree in co-relation 3138. Up to 7322 conditions per place. [2023-01-27 19:15:56,038 INFO L137 encePairwiseOnDemand]: 299/302 looper letters, 87 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2023-01-27 19:15:56,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 99 transitions, 411 flow [2023-01-27 19:15:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:15:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:15:56,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 928 transitions. [2023-01-27 19:15:56,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121412803532008 [2023-01-27 19:15:56,113 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 928 transitions. [2023-01-27 19:15:56,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 928 transitions. [2023-01-27 19:15:56,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:15:56,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 928 transitions. [2023-01-27 19:15:56,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.66666666666666) internal successors, (928), 6 states have internal predecessors, (928), 0 states have call successors, (0), 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 19:15:56,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 302.0) internal successors, (2114), 7 states have internal predecessors, (2114), 0 states have call successors, (0), 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 19:15:56,118 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 302.0) internal successors, (2114), 7 states have internal predecessors, (2114), 0 states have call successors, (0), 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 19:15:56,118 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 121 flow. Second operand 6 states and 928 transitions. [2023-01-27 19:15:56,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 99 transitions, 411 flow [2023-01-27 19:15:56,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 403 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-27 19:15:56,123 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-01-27 19:15:56,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-01-27 19:15:56,124 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-01-27 19:15:56,124 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-01-27 19:15:56,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 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 19:15:56,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:15:56,124 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:15:56,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 19:15:56,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-01-27 19:15:56,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:15:56,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:15:56,326 INFO L85 PathProgramCache]: Analyzing trace with hash 187445566, now seen corresponding path program 1 times [2023-01-27 19:15:56,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:15:56,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402133608] [2023-01-27 19:15:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:15:56,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:15:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:15:56,336 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:15:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:15:56,356 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:15:56,356 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:15:56,356 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:15:56,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:15:56,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 19:15:56,357 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:15:56,358 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:15:56,358 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:15:56,379 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:15:56,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 210 transitions, 464 flow [2023-01-27 19:15:56,425 INFO L130 PetriNetUnfolder]: 81/536 cut-off events. [2023-01-27 19:15:56,426 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:15:56,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 536 events. 81/536 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2018 event pairs, 6 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 371. Up to 32 conditions per place. [2023-01-27 19:15:56,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 210 transitions, 464 flow [2023-01-27 19:15:56,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 210 transitions, 464 flow [2023-01-27 19:15:56,434 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:15:56,434 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 210 transitions, 464 flow [2023-01-27 19:15:56,434 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 210 transitions, 464 flow [2023-01-27 19:15:56,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 210 transitions, 464 flow [2023-01-27 19:15:56,472 INFO L130 PetriNetUnfolder]: 81/536 cut-off events. [2023-01-27 19:15:56,472 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:15:56,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 536 events. 81/536 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2018 event pairs, 6 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 371. Up to 32 conditions per place. [2023-01-27 19:15:56,488 INFO L119 LiptonReduction]: Number of co-enabled transitions 24192 [2023-01-27 19:15:59,345 INFO L134 LiptonReduction]: Checked pairs total: 57171 [2023-01-27 19:15:59,345 INFO L136 LiptonReduction]: Total number of compositions: 143 [2023-01-27 19:15:59,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:15:59,347 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;@da96fb7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:15:59,347 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:15:59,348 INFO L130 PetriNetUnfolder]: 0/10 cut-off events. [2023-01-27 19:15:59,348 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:15:59,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:15:59,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:15:59,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:15:59,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:15:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash 43655274, now seen corresponding path program 1 times [2023-01-27 19:15:59,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:15:59,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602309375] [2023-01-27 19:15:59,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:15:59,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:15:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:15:59,381 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 19:15:59,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:15:59,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602309375] [2023-01-27 19:15:59,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602309375] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:15:59,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:15:59,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:15:59,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215445786] [2023-01-27 19:15:59,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:15:59,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:15:59,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:15:59,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:15:59,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:15:59,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 353 [2023-01-27 19:15:59,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 92 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:15:59,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:15:59,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 353 [2023-01-27 19:15:59,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:16:31,405 INFO L130 PetriNetUnfolder]: 376438/514006 cut-off events. [2023-01-27 19:16:31,405 INFO L131 PetriNetUnfolder]: For 20819/20819 co-relation queries the response was YES. [2023-01-27 19:16:32,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015852 conditions, 514006 events. 376438/514006 cut-off events. For 20819/20819 co-relation queries the response was YES. Maximal size of possible extension queue 9766. Compared 3875096 event pairs, 364045 based on Foata normal form. 78226/555407 useless extension candidates. Maximal degree in co-relation 85871. Up to 490459 conditions per place. [2023-01-27 19:16:33,300 INFO L137 encePairwiseOnDemand]: 324/353 looper letters, 54 selfloop transitions, 2 changer transitions 10/77 dead transitions. [2023-01-27 19:16:33,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 77 transitions, 328 flow [2023-01-27 19:16:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:16:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:16:33,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2023-01-27 19:16:33,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5599622285174694 [2023-01-27 19:16:33,302 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2023-01-27 19:16:33,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2023-01-27 19:16:33,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:16:33,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2023-01-27 19:16:33,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 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 19:16:33,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 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 19:16:33,305 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 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 19:16:33,305 INFO L175 Difference]: Start difference. First operand has 71 places, 92 transitions, 228 flow. Second operand 3 states and 593 transitions. [2023-01-27 19:16:33,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 77 transitions, 328 flow [2023-01-27 19:16:33,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 77 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:16:33,310 INFO L231 Difference]: Finished difference. Result has 74 places, 57 transitions, 156 flow [2023-01-27 19:16:33,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=74, PETRI_TRANSITIONS=57} [2023-01-27 19:16:33,310 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-01-27 19:16:33,311 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 57 transitions, 156 flow [2023-01-27 19:16:33,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:33,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:33,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:16:33,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 19:16:33,311 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:16:33,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:33,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1292766622, now seen corresponding path program 1 times [2023-01-27 19:16:33,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:33,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044017323] [2023-01-27 19:16:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:33,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:33,335 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 19:16:33,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:16:33,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044017323] [2023-01-27 19:16:33,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044017323] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:16:33,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202288899] [2023-01-27 19:16:33,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:33,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:16:33,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:16:33,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:16:33,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 19:16:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:33,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:16:33,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:16:33,419 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 19:16:33,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:16:33,432 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 19:16:33,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202288899] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:16:33,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:16:33,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:16:33,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131219700] [2023-01-27 19:16:33,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:16:33,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:16:33,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:16:33,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:16:33,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:16:33,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 353 [2023-01-27 19:16:33,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 167.28571428571428) internal successors, (1171), 7 states have internal predecessors, (1171), 0 states have call successors, (0), 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 19:16:33,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:16:33,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 353 [2023-01-27 19:16:33,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:16:47,437 INFO L130 PetriNetUnfolder]: 191482/256657 cut-off events. [2023-01-27 19:16:47,437 INFO L131 PetriNetUnfolder]: For 22240/22240 co-relation queries the response was YES. [2023-01-27 19:16:48,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533262 conditions, 256657 events. 191482/256657 cut-off events. For 22240/22240 co-relation queries the response was YES. Maximal size of possible extension queue 5456. Compared 1792391 event pairs, 7920 based on Foata normal form. 1110/257766 useless extension candidates. Maximal degree in co-relation 54456. Up to 163477 conditions per place. [2023-01-27 19:16:49,208 INFO L137 encePairwiseOnDemand]: 349/353 looper letters, 136 selfloop transitions, 6 changer transitions 0/153 dead transitions. [2023-01-27 19:16:49,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 153 transitions, 636 flow [2023-01-27 19:16:49,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:16:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:16:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1135 transitions. [2023-01-27 19:16:49,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358829084041549 [2023-01-27 19:16:49,217 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1135 transitions. [2023-01-27 19:16:49,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1135 transitions. [2023-01-27 19:16:49,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:16:49,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1135 transitions. [2023-01-27 19:16:49,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 189.16666666666666) internal successors, (1135), 6 states have internal predecessors, (1135), 0 states have call successors, (0), 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 19:16:49,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 0 states have call successors, (0), 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 19:16:49,223 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 0 states have call successors, (0), 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 19:16:49,223 INFO L175 Difference]: Start difference. First operand has 74 places, 57 transitions, 156 flow. Second operand 6 states and 1135 transitions. [2023-01-27 19:16:49,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 153 transitions, 636 flow [2023-01-27 19:16:49,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 153 transitions, 622 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:16:49,258 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-01-27 19:16:49,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-01-27 19:16:49,259 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-01-27 19:16:49,259 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-01-27 19:16:49,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 167.28571428571428) internal successors, (1171), 7 states have internal predecessors, (1171), 0 states have call successors, (0), 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 19:16:49,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:49,260 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 19:16:49,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-27 19:16:49,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:16:49,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:16:49,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:49,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1189301793, now seen corresponding path program 1 times [2023-01-27 19:16:49,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:49,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001468479] [2023-01-27 19:16:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:49,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:16:49,479 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:16:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:16:49,498 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:16:49,498 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:16:49,498 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:16:49,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:16:49,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:16:49,499 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:16:49,500 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:16:49,500 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 19:16:49,521 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-27 19:16:49,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 244 transitions, 548 flow [2023-01-27 19:16:49,588 INFO L130 PetriNetUnfolder]: 140/853 cut-off events. [2023-01-27 19:16:49,588 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:16:49,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 964 conditions, 853 events. 140/853 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3708 event pairs, 23 based on Foata normal form. 0/723 useless extension candidates. Maximal degree in co-relation 581. Up to 80 conditions per place. [2023-01-27 19:16:49,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 244 transitions, 548 flow [2023-01-27 19:16:49,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 244 transitions, 548 flow [2023-01-27 19:16:49,611 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:16:49,611 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 215 places, 244 transitions, 548 flow [2023-01-27 19:16:49,611 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 215 places, 244 transitions, 548 flow [2023-01-27 19:16:49,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 244 transitions, 548 flow [2023-01-27 19:16:49,673 INFO L130 PetriNetUnfolder]: 140/853 cut-off events. [2023-01-27 19:16:49,673 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:16:49,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 964 conditions, 853 events. 140/853 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3708 event pairs, 23 based on Foata normal form. 0/723 useless extension candidates. Maximal degree in co-relation 581. Up to 80 conditions per place. [2023-01-27 19:16:49,698 INFO L119 LiptonReduction]: Number of co-enabled transitions 35840 [2023-01-27 19:16:52,492 INFO L134 LiptonReduction]: Checked pairs total: 89844 [2023-01-27 19:16:52,492 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-01-27 19:16:52,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:16:52,494 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=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;@da96fb7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:16:52,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:16:52,495 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:16:52,495 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:16:52,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:52,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:16:52,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:16:52,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:52,495 INFO L85 PathProgramCache]: Analyzing trace with hash 57273056, now seen corresponding path program 1 times [2023-01-27 19:16:52,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:52,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381947033] [2023-01-27 19:16:52,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:52,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:52,515 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 19:16:52,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:16:52,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381947033] [2023-01-27 19:16:52,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381947033] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:16:52,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:16:52,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:16:52,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689810071] [2023-01-27 19:16:52,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:16:52,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:16:52,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:16:52,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:16:52,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:16:52,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 409 [2023-01-27 19:16:52,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 111 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 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 19:16:52,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:16:52,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 409 [2023-01-27 19:16:52,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand