/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_12-ptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:10:39,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:10:39,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:10:39,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:10:39,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:10:39,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:10:39,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:10:39,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:10:39,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:10:39,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:10:39,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:10:39,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:10:39,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:10:39,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:10:39,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:10:39,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:10:39,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:10:39,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:10:39,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:10:39,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:10:39,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:10:39,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:10:39,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:10:39,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:10:39,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:10:39,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:10:39,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:10:39,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:10:39,158 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 19:10:39,179 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:10:39,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:10:39,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:10:39,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:10:39,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:10:39,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:10:39,181 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:10:39,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:10:39,182 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:10:39,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:10:39,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:10:39,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:10:39,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:10:39,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:10:39,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:10:39,183 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:10:39,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:10:39,183 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:10:39,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:10:39,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:10:39,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:10:39,183 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:10:39,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:10:39,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:10:39,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:10:39,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:10:39,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:10:39,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:10:39,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:10:39,184 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:10:39,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:10:39,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:10:39,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:10:39,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:10:39,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:10:39,335 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:10:39,335 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:10:39,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-01-27 19:10:40,258 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:10:40,499 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:10:40,499 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-01-27 19:10:40,511 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e2c45cb1/6eeab8db092f46bcaa2d9cd3a4dfcb9b/FLAG564bdd1ea [2023-01-27 19:10:40,520 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e2c45cb1/6eeab8db092f46bcaa2d9cd3a4dfcb9b [2023-01-27 19:10:40,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:10:40,522 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:10:40,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:10:40,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:10:40,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:10:40,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:10:40" (1/1) ... [2023-01-27 19:10:40,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@575aed18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:10:40, skipping insertion in model container [2023-01-27 19:10:40,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:10:40" (1/1) ... [2023-01-27 19:10:40,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:10:40,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:10:40,735 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_12-ptr_racefree.i[30176,30189] [2023-01-27 19:10:40,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:10:40,769 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:10:40,803 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_12-ptr_racefree.i[30176,30189] [2023-01-27 19:10:40,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:10:40,850 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:10:40,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:10:40 WrapperNode [2023-01-27 19:10:40,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:10:40,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:10:40,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:10:40,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:10:40,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:10:40" (1/1) ... [2023-01-27 19:10:40,873 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:10:40" (1/1) ... [2023-01-27 19:10:40,894 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-01-27 19:10:40,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:10:40,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:10:40,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:10:40,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:10:40,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:10:40" (1/1) ... [2023-01-27 19:10:40,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:10:40" (1/1) ... [2023-01-27 19:10:40,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:10:40" (1/1) ... [2023-01-27 19:10:40,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:10:40" (1/1) ... [2023-01-27 19:10:40,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:10:40" (1/1) ... [2023-01-27 19:10:40,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:10:40" (1/1) ... [2023-01-27 19:10:40,915 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:10:40" (1/1) ... [2023-01-27 19:10:40,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:10:40" (1/1) ... [2023-01-27 19:10:40,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:10:40,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:10:40,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:10:40,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:10:40,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:10:40" (1/1) ... [2023-01-27 19:10:40,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:10:40,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:10:40,951 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 19:10:40,960 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 19:10:40,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:10:40,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:10:40,977 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:10:40,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:10:40,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:10:40,977 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:10:40,977 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:10:40,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:10:40,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:10:40,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:10:40,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:10:40,978 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 19:10:41,117 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:10:41,118 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:10:41,317 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:10:41,322 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:10:41,322 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-01-27 19:10:41,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:10:41 BoogieIcfgContainer [2023-01-27 19:10:41,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:10:41,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:10:41,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:10:41,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:10:41,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:10:40" (1/3) ... [2023-01-27 19:10:41,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169357d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:10:41, skipping insertion in model container [2023-01-27 19:10:41,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:10:40" (2/3) ... [2023-01-27 19:10:41,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169357d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:10:41, skipping insertion in model container [2023-01-27 19:10:41,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:10:41" (3/3) ... [2023-01-27 19:10:41,331 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2023-01-27 19:10:41,344 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:10:41,344 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:10:41,345 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:10:41,386 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:10:41,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 117 transitions, 242 flow [2023-01-27 19:10:41,457 INFO L130 PetriNetUnfolder]: 17/152 cut-off events. [2023-01-27 19:10:41,457 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:10:41,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 152 events. 17/152 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 349 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-01-27 19:10:41,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 117 transitions, 242 flow [2023-01-27 19:10:41,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 112 transitions, 229 flow [2023-01-27 19:10:41,468 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:10:41,474 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 112 transitions, 229 flow [2023-01-27 19:10:41,475 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 112 transitions, 229 flow [2023-01-27 19:10:41,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 112 transitions, 229 flow [2023-01-27 19:10:41,500 INFO L130 PetriNetUnfolder]: 16/147 cut-off events. [2023-01-27 19:10:41,501 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:10:41,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 147 events. 16/147 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 333 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-01-27 19:10:41,503 INFO L119 LiptonReduction]: Number of co-enabled transitions 2706 [2023-01-27 19:10:43,831 INFO L134 LiptonReduction]: Checked pairs total: 4811 [2023-01-27 19:10:43,831 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-01-27 19:10:43,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:10:43,846 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;@28cc9ba3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:10:43,846 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:10:43,849 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:10:43,849 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:10:43,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:10:43,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:10:43,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:10:43,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:10:43,854 INFO L85 PathProgramCache]: Analyzing trace with hash 13710433, now seen corresponding path program 1 times [2023-01-27 19:10:43,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:10:43,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962604895] [2023-01-27 19:10:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:10:43,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:10:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:10:44,003 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 19:10:44,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:10:44,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962604895] [2023-01-27 19:10:44,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962604895] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:10:44,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:10:44,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:10:44,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442142195] [2023-01-27 19:10:44,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:10:44,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:10:44,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:10:44,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:10:44,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:10:44,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 212 [2023-01-27 19:10:44,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 19:10:44,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:10:44,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 212 [2023-01-27 19:10:44,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:10:44,084 INFO L130 PetriNetUnfolder]: 80/188 cut-off events. [2023-01-27 19:10:44,084 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:10:44,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 188 events. 80/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 634 event pairs, 63 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 361. Up to 169 conditions per place. [2023-01-27 19:10:44,086 INFO L137 encePairwiseOnDemand]: 200/212 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2023-01-27 19:10:44,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 135 flow [2023-01-27 19:10:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:10:44,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:10:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-01-27 19:10:44,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267295597484277 [2023-01-27 19:10:44,096 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-01-27 19:10:44,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-01-27 19:10:44,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:10:44,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-01-27 19:10:44,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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 19:10:44,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 19:10:44,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 19:10:44,106 INFO L175 Difference]: Start difference. First operand has 27 places, 32 transitions, 69 flow. Second operand 3 states and 335 transitions. [2023-01-27 19:10:44,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 135 flow [2023-01-27 19:10:44,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:10:44,109 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 51 flow [2023-01-27 19:10:44,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, 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 19:10:44,113 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-01-27 19:10:44,113 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 51 flow [2023-01-27 19:10:44,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 19:10:44,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:10:44,113 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:10:44,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:10:44,114 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:10:44,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:10:44,114 INFO L85 PathProgramCache]: Analyzing trace with hash 279667799, now seen corresponding path program 1 times [2023-01-27 19:10:44,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:10:44,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900881847] [2023-01-27 19:10:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:10:44,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:10:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:10:44,134 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:10:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:10:44,157 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:10:44,157 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:10:44,158 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:10:44,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:10:44,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:10:44,160 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:10:44,162 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:10:44,162 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:10:44,175 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:10:44,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 152 transitions, 322 flow [2023-01-27 19:10:44,196 INFO L130 PetriNetUnfolder]: 31/246 cut-off events. [2023-01-27 19:10:44,197 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:10:44,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 717 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-01-27 19:10:44,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 152 transitions, 322 flow [2023-01-27 19:10:44,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 152 transitions, 322 flow [2023-01-27 19:10:44,200 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:10:44,200 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 152 transitions, 322 flow [2023-01-27 19:10:44,200 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 152 transitions, 322 flow [2023-01-27 19:10:44,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 152 transitions, 322 flow [2023-01-27 19:10:44,215 INFO L130 PetriNetUnfolder]: 31/246 cut-off events. [2023-01-27 19:10:44,215 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:10:44,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 717 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-01-27 19:10:44,220 INFO L119 LiptonReduction]: Number of co-enabled transitions 8316 [2023-01-27 19:10:46,509 INFO L134 LiptonReduction]: Checked pairs total: 18331 [2023-01-27 19:10:46,510 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-01-27 19:10:46,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:10:46,512 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;@28cc9ba3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:10:46,512 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:10:46,513 INFO L130 PetriNetUnfolder]: 0/9 cut-off events. [2023-01-27 19:10:46,513 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:10:46,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:10:46,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:10:46,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:10:46,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:10:46,514 INFO L85 PathProgramCache]: Analyzing trace with hash 23037586, now seen corresponding path program 1 times [2023-01-27 19:10:46,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:10:46,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571407396] [2023-01-27 19:10:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:10:46,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:10:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:10:46,564 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 19:10:46,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:10:46,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571407396] [2023-01-27 19:10:46,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571407396] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:10:46,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:10:46,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:10:46,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420424365] [2023-01-27 19:10:46,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:10:46,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:10:46,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:10:46,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:10:46,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:10:46,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 268 [2023-01-27 19:10:46,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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 19:10:46,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:10:46,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 268 [2023-01-27 19:10:46,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:10:46,762 INFO L130 PetriNetUnfolder]: 1642/2949 cut-off events. [2023-01-27 19:10:46,762 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:10:46,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5703 conditions, 2949 events. 1642/2949 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 17538 event pairs, 752 based on Foata normal form. 428/3078 useless extension candidates. Maximal degree in co-relation 589. Up to 2673 conditions per place. [2023-01-27 19:10:46,770 INFO L137 encePairwiseOnDemand]: 251/268 looper letters, 32 selfloop transitions, 2 changer transitions 9/51 dead transitions. [2023-01-27 19:10:46,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2023-01-27 19:10:46,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:10:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:10:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-01-27 19:10:46,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373134328358209 [2023-01-27 19:10:46,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-01-27 19:10:46,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-01-27 19:10:46,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:10:46,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-01-27 19:10:46,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:10:46,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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 19:10:46,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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 19:10:46,775 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 432 transitions. [2023-01-27 19:10:46,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2023-01-27 19:10:46,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:10:46,777 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 88 flow [2023-01-27 19:10:46,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-01-27 19:10:46,778 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-01-27 19:10:46,778 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 88 flow [2023-01-27 19:10:46,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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 19:10:46,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:10:46,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:10:46,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:10:46,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:10:46,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:10:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash -786023163, now seen corresponding path program 1 times [2023-01-27 19:10:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:10:46,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657073008] [2023-01-27 19:10:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:10:46,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:10:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:10:46,815 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 19:10:46,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:10:46,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657073008] [2023-01-27 19:10:46,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657073008] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:10:46,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987705686] [2023-01-27 19:10:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:10:46,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:10:46,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:10:46,838 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 19:10:46,843 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 19:10:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:10:46,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:10:46,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:10:46,935 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 19:10:46,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:10:46,947 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 19:10:46,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987705686] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:10:46,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:10:46,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:10:46,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424671313] [2023-01-27 19:10:46,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:10:46,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:10:46,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:10:46,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:10:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:10:46,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 268 [2023-01-27 19:10:46,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 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 19:10:46,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:10:46,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 268 [2023-01-27 19:10:46,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:10:47,035 INFO L130 PetriNetUnfolder]: 376/769 cut-off events. [2023-01-27 19:10:47,036 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2023-01-27 19:10:47,037 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 39. Compared 3940 event pairs, 0 based on Foata normal form. 90/858 useless extension candidates. Maximal degree in co-relation 190. Up to 450 conditions per place. [2023-01-27 19:10:47,039 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-01-27 19:10:47,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 228 flow [2023-01-27 19:10:47,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:10:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:10:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 665 transitions. [2023-01-27 19:10:47,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962686567164179 [2023-01-27 19:10:47,041 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 665 transitions. [2023-01-27 19:10:47,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 665 transitions. [2023-01-27 19:10:47,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:10:47,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 665 transitions. [2023-01-27 19:10:47,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 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 19:10:47,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 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 19:10:47,045 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 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 19:10:47,045 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 88 flow. Second operand 5 states and 665 transitions. [2023-01-27 19:10:47,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 228 flow [2023-01-27 19:10:47,046 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 19:10:47,047 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-01-27 19:10:47,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, 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 19:10:47,048 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-01-27 19:10:47,048 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-01-27 19:10:47,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 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 19:10:47,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:10:47,049 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:10:47,056 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 19:10:47,253 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 19:10:47,253 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:10:47,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:10:47,253 INFO L85 PathProgramCache]: Analyzing trace with hash -643666801, now seen corresponding path program 1 times [2023-01-27 19:10:47,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:10:47,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233036653] [2023-01-27 19:10:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:10:47,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:10:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:10:47,264 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:10:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:10:47,287 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:10:47,287 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:10:47,287 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:10:47,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:10:47,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:10:47,288 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:10:47,288 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:10:47,288 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:10:47,327 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:10:47,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 187 transitions, 404 flow [2023-01-27 19:10:47,351 INFO L130 PetriNetUnfolder]: 50/371 cut-off events. [2023-01-27 19:10:47,351 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:10:47,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 371 events. 50/371 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1228 event pairs, 1 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2023-01-27 19:10:47,352 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 187 transitions, 404 flow [2023-01-27 19:10:47,354 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 187 transitions, 404 flow [2023-01-27 19:10:47,354 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:10:47,354 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 187 transitions, 404 flow [2023-01-27 19:10:47,354 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 187 transitions, 404 flow [2023-01-27 19:10:47,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 187 transitions, 404 flow [2023-01-27 19:10:47,375 INFO L130 PetriNetUnfolder]: 50/371 cut-off events. [2023-01-27 19:10:47,375 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:10:47,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 371 events. 50/371 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1228 event pairs, 1 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2023-01-27 19:10:47,385 INFO L119 LiptonReduction]: Number of co-enabled transitions 16038 [2023-01-27 19:10:49,880 INFO L134 LiptonReduction]: Checked pairs total: 34965 [2023-01-27 19:10:49,880 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-01-27 19:10:49,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:10:49,882 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;@28cc9ba3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:10:49,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:10:49,883 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:10:49,883 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:10:49,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:10:49,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:10:49,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:10:49,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:10:49,883 INFO L85 PathProgramCache]: Analyzing trace with hash 34118303, now seen corresponding path program 1 times [2023-01-27 19:10:49,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:10:49,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377142653] [2023-01-27 19:10:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:10:49,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:10:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:10:49,903 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 19:10:49,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:10:49,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377142653] [2023-01-27 19:10:49,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377142653] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:10:49,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:10:49,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:10:49,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212253997] [2023-01-27 19:10:49,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:10:49,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:10:49,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:10:49,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:10:49,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:10:49,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 325 [2023-01-27 19:10:49,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 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 19:10:49,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:10:49,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 325 [2023-01-27 19:10:49,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:10:52,414 INFO L130 PetriNetUnfolder]: 32280/46608 cut-off events. [2023-01-27 19:10:52,415 INFO L131 PetriNetUnfolder]: For 1321/1321 co-relation queries the response was YES. [2023-01-27 19:10:52,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92837 conditions, 46608 events. 32280/46608 cut-off events. For 1321/1321 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 303426 event pairs, 21006 based on Foata normal form. 5103/47987 useless extension candidates. Maximal degree in co-relation 7949. Up to 45346 conditions per place. [2023-01-27 19:10:52,552 INFO L137 encePairwiseOnDemand]: 302/325 looper letters, 44 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2023-01-27 19:10:52,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 268 flow [2023-01-27 19:10:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:10:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:10:52,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 532 transitions. [2023-01-27 19:10:52,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456410256410257 [2023-01-27 19:10:52,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 532 transitions. [2023-01-27 19:10:52,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 532 transitions. [2023-01-27 19:10:52,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:10:52,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 532 transitions. [2023-01-27 19:10:52,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:10:52,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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 19:10:52,558 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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 19:10:52,558 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 532 transitions. [2023-01-27 19:10:52,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 268 flow [2023-01-27 19:10:52,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:10:52,563 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 121 flow [2023-01-27 19:10:52,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-01-27 19:10:52,566 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-01-27 19:10:52,566 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 121 flow [2023-01-27 19:10:52,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 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 19:10:52,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:10:52,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:10:52,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:10:52,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:10:52,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:10:52,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1524411247, now seen corresponding path program 1 times [2023-01-27 19:10:52,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:10:52,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312000055] [2023-01-27 19:10:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:10:52,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:10:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:10:52,623 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 19:10:52,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:10:52,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312000055] [2023-01-27 19:10:52,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312000055] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:10:52,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172929161] [2023-01-27 19:10:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:10:52,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:10:52,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:10:52,625 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 19:10:52,656 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 19:10:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:10:52,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:10:52,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:10:52,708 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 19:10:52,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:10:52,720 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 19:10:52,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172929161] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:10:52,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:10:52,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:10:52,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841186487] [2023-01-27 19:10:52,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:10:52,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:10:52,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:10:52,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:10:52,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:10:52,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 325 [2023-01-27 19:10:52,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 152.28571428571428) internal successors, (1066), 7 states have internal predecessors, (1066), 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 19:10:52,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:10:52,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 325 [2023-01-27 19:10:52,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:10:53,485 INFO L130 PetriNetUnfolder]: 7582/12187 cut-off events. [2023-01-27 19:10:53,486 INFO L131 PetriNetUnfolder]: For 4374/4374 co-relation queries the response was YES. [2023-01-27 19:10:53,502 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 81288 event pairs, 0 based on Foata normal form. 1098/13284 useless extension candidates. Maximal degree in co-relation 3138. Up to 7322 conditions per place. [2023-01-27 19:10:53,543 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 87 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2023-01-27 19:10:53,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 99 transitions, 411 flow [2023-01-27 19:10:53,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:10:53,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:10:53,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 994 transitions. [2023-01-27 19:10:53,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097435897435898 [2023-01-27 19:10:53,545 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 994 transitions. [2023-01-27 19:10:53,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 994 transitions. [2023-01-27 19:10:53,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:10:53,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 994 transitions. [2023-01-27 19:10:53,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 165.66666666666666) internal successors, (994), 6 states have internal predecessors, (994), 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 19:10:53,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 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 19:10:53,550 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 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 19:10:53,550 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 121 flow. Second operand 6 states and 994 transitions. [2023-01-27 19:10:53,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 99 transitions, 411 flow [2023-01-27 19:10:53,555 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 19:10:53,556 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-01-27 19:10:53,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, 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 19:10:53,557 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-01-27 19:10:53,557 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-01-27 19:10:53,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.28571428571428) internal successors, (1066), 7 states have internal predecessors, (1066), 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 19:10:53,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:10:53,558 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:10:53,566 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 19:10:53,764 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 19:10:53,764 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:10:53,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:10:53,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1949228637, now seen corresponding path program 1 times [2023-01-27 19:10:53,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:10:53,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417325355] [2023-01-27 19:10:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:10:53,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:10:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:10:53,779 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:10:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:10:53,804 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:10:53,804 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:10:53,805 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:10:53,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:10:53,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 19:10:53,805 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:10:53,806 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:10:53,806 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:10:53,830 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:10:53,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 222 transitions, 488 flow [2023-01-27 19:10:53,875 INFO L130 PetriNetUnfolder]: 81/560 cut-off events. [2023-01-27 19:10:53,875 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:10:53,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 560 events. 81/560 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2118 event pairs, 6 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 391. Up to 32 conditions per place. [2023-01-27 19:10:53,879 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 222 transitions, 488 flow [2023-01-27 19:10:53,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 222 transitions, 488 flow [2023-01-27 19:10:53,881 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:10:53,881 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 222 transitions, 488 flow [2023-01-27 19:10:53,881 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 222 transitions, 488 flow [2023-01-27 19:10:53,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 222 transitions, 488 flow [2023-01-27 19:10:53,924 INFO L130 PetriNetUnfolder]: 81/560 cut-off events. [2023-01-27 19:10:53,924 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:10:53,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 560 events. 81/560 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2118 event pairs, 6 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 391. Up to 32 conditions per place. [2023-01-27 19:10:53,941 INFO L119 LiptonReduction]: Number of co-enabled transitions 26136 [2023-01-27 19:10:56,571 INFO L134 LiptonReduction]: Checked pairs total: 59650 [2023-01-27 19:10:56,571 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-01-27 19:10:56,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:10:56,573 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;@28cc9ba3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:10:56,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:10:56,574 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:10:56,574 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:10:56,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:10:56,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:10:56,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:10:56,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:10:56,574 INFO L85 PathProgramCache]: Analyzing trace with hash 46802028, now seen corresponding path program 1 times [2023-01-27 19:10:56,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:10:56,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825263030] [2023-01-27 19:10:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:10:56,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:10:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:10:56,623 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 19:10:56,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:10:56,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825263030] [2023-01-27 19:10:56,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825263030] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:10:56,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:10:56,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:10:56,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798785934] [2023-01-27 19:10:56,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:10:56,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:10:56,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:10:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:10:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:10:56,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 377 [2023-01-27 19:10:56,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 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 19:10:56,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:10:56,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 377 [2023-01-27 19:10:56,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:11:28,956 INFO L130 PetriNetUnfolder]: 411276/560855 cut-off events. [2023-01-27 19:11:28,956 INFO L131 PetriNetUnfolder]: For 20805/20805 co-relation queries the response was YES. [2023-01-27 19:11:29,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1107559 conditions, 560855 events. 411276/560855 cut-off events. For 20805/20805 co-relation queries the response was YES. Maximal size of possible extension queue 10500. Compared 4246779 event pairs, 397881 based on Foata normal form. 85320/609167 useless extension candidates. Maximal degree in co-relation 94004. Up to 535317 conditions per place. [2023-01-27 19:11:30,801 INFO L137 encePairwiseOnDemand]: 348/377 looper letters, 54 selfloop transitions, 2 changer transitions 11/78 dead transitions. [2023-01-27 19:11:30,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 332 flow [2023-01-27 19:11:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:11:30,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:11:30,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2023-01-27 19:11:30,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570291777188329 [2023-01-27 19:11:30,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2023-01-27 19:11:30,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2023-01-27 19:11:30,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:11:30,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2023-01-27 19:11:30,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 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 19:11:30,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 19:11:30,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 19:11:30,806 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 630 transitions. [2023-01-27 19:11:30,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 332 flow [2023-01-27 19:11:30,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:11:30,812 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 156 flow [2023-01-27 19:11:30,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2023-01-27 19:11:30,813 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-01-27 19:11:30,813 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 156 flow [2023-01-27 19:11:30,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 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 19:11:30,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:30,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:11:30,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 19:11:30,814 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:11:30,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1134248662, now seen corresponding path program 1 times [2023-01-27 19:11:30,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:30,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568766014] [2023-01-27 19:11:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:30,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:30,846 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 19:11:30,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:11:30,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568766014] [2023-01-27 19:11:30,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568766014] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:11:30,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192727512] [2023-01-27 19:11:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:30,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:11:30,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:11:30,849 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 19:11:30,851 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 19:11:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:30,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:11:30,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:11:30,926 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 19:11:30,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:11:30,939 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 19:11:30,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192727512] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:11:30,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:11:30,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:11:30,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830495431] [2023-01-27 19:11:30,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:11:30,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:11:30,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:11:30,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:11:30,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:11:30,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 377 [2023-01-27 19:11:30,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 179.28571428571428) internal successors, (1255), 7 states have internal predecessors, (1255), 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 19:11:30,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:11:30,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 377 [2023-01-27 19:11:30,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:11:44,042 INFO L130 PetriNetUnfolder]: 191482/256657 cut-off events. [2023-01-27 19:11:44,043 INFO L131 PetriNetUnfolder]: For 22240/22240 co-relation queries the response was YES. [2023-01-27 19:11:44,634 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 1795745 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 19:11:45,426 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 136 selfloop transitions, 6 changer transitions 0/153 dead transitions. [2023-01-27 19:11:45,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 153 transitions, 636 flow [2023-01-27 19:11:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:11:45,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:11:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1207 transitions. [2023-01-27 19:11:45,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335985853227233 [2023-01-27 19:11:45,429 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1207 transitions. [2023-01-27 19:11:45,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1207 transitions. [2023-01-27 19:11:45,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:11:45,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1207 transitions. [2023-01-27 19:11:45,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.16666666666666) internal successors, (1207), 6 states have internal predecessors, (1207), 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 19:11:45,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 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 19:11:45,434 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 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 19:11:45,434 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 156 flow. Second operand 6 states and 1207 transitions. [2023-01-27 19:11:45,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 153 transitions, 636 flow [2023-01-27 19:11:45,450 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 19:11:45,451 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-01-27 19:11:45,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, 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 19:11:45,452 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-01-27 19:11:45,452 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-01-27 19:11:45,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.28571428571428) internal successors, (1255), 7 states have internal predecessors, (1255), 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 19:11:45,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:45,453 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 19:11:45,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 19:11:45,659 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 19:11:45,659 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:11:45,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:45,660 INFO L85 PathProgramCache]: Analyzing trace with hash 158876387, now seen corresponding path program 1 times [2023-01-27 19:11:45,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:45,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668625460] [2023-01-27 19:11:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:45,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:45,673 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:11:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:45,693 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:11:45,693 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:11:45,693 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:11:45,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:11:45,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:11:45,694 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:11:45,694 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:11:45,694 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 19:11:45,718 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-27 19:11:45,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 257 transitions, 574 flow [2023-01-27 19:11:45,791 INFO L130 PetriNetUnfolder]: 140/881 cut-off events. [2023-01-27 19:11:45,791 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:11:45,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 881 events. 140/881 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3972 event pairs, 23 based on Foata normal form. 0/751 useless extension candidates. Maximal degree in co-relation 605. Up to 80 conditions per place. [2023-01-27 19:11:45,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 257 transitions, 574 flow [2023-01-27 19:11:45,802 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 257 transitions, 574 flow [2023-01-27 19:11:45,802 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:11:45,802 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 257 transitions, 574 flow [2023-01-27 19:11:45,802 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 257 transitions, 574 flow [2023-01-27 19:11:45,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 257 transitions, 574 flow [2023-01-27 19:11:45,873 INFO L130 PetriNetUnfolder]: 140/881 cut-off events. [2023-01-27 19:11:45,873 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:11:45,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 881 events. 140/881 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3972 event pairs, 23 based on Foata normal form. 0/751 useless extension candidates. Maximal degree in co-relation 605. Up to 80 conditions per place. [2023-01-27 19:11:45,901 INFO L119 LiptonReduction]: Number of co-enabled transitions 38610 [2023-01-27 19:11:48,417 INFO L134 LiptonReduction]: Checked pairs total: 101878 [2023-01-27 19:11:48,417 INFO L136 LiptonReduction]: Total number of compositions: 179 [2023-01-27 19:11:48,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:11:48,418 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;@28cc9ba3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:11:48,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:11:48,419 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:11:48,419 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:11:48,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:48,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:11:48,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:11:48,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:48,420 INFO L85 PathProgramCache]: Analyzing trace with hash 61297659, now seen corresponding path program 1 times [2023-01-27 19:11:48,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:48,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614260542] [2023-01-27 19:11:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:48,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:48,446 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 19:11:48,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:11:48,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614260542] [2023-01-27 19:11:48,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614260542] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:11:48,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:11:48,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:11:48,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435062732] [2023-01-27 19:11:48,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:11:48,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:11:48,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:11:48,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:11:48,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:11:48,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 436 [2023-01-27 19:11:48,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 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 19:11:48,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:11:48,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 436 [2023-01-27 19:11:48,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand