/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_79-equ_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:26:28,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:26:28,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:26:28,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:26:28,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:26:28,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:26:28,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:26:28,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:26:28,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:26:28,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:26:28,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:26:28,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:26:28,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:26:28,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:26:28,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:26:28,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:26:28,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:26:28,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:26:28,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:26:28,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:26:28,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:26:28,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:26:28,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:26:28,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:26:28,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:26:28,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:26:28,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:26:28,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:26:28,288 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 19:26:28,313 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:26:28,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:26:28,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:26:28,314 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:26:28,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:26:28,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:26:28,315 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:26:28,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:26:28,315 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:26:28,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:26:28,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:26:28,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:26:28,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:26:28,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:26:28,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:26:28,316 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:26:28,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:26:28,316 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:26:28,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:26:28,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:26:28,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:26:28,316 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:26:28,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:26:28,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:26:28,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:26:28,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:26:28,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:26:28,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:26:28,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:26:28,317 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:26:28,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:26:28,318 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:26:28,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:26:28,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:26:28,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:26:28,519 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:26:28,519 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:26:28,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i [2023-01-27 19:26:29,517 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:26:29,689 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:26:29,689 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i [2023-01-27 19:26:29,699 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be20580b6/12789ccf7d644d958515c7fc5497e968/FLAG9f18ae90d [2023-01-27 19:26:29,721 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be20580b6/12789ccf7d644d958515c7fc5497e968 [2023-01-27 19:26:29,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:26:29,724 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:26:29,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:26:29,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:26:29,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:26:29,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:26:29" (1/1) ... [2023-01-27 19:26:29,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c116167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:26:29, skipping insertion in model container [2023-01-27 19:26:29,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:26:29" (1/1) ... [2023-01-27 19:26:29,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:26:29,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:26:30,018 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_79-equ_racefree.i[47038,47051] [2023-01-27 19:26:30,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:26:30,059 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:26:30,095 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_79-equ_racefree.i[47038,47051] [2023-01-27 19:26:30,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:26:30,145 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:26:30,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:26:30 WrapperNode [2023-01-27 19:26:30,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:26:30,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:26:30,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:26:30,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:26:30,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:26:30" (1/1) ... [2023-01-27 19:26:30,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:26:30" (1/1) ... [2023-01-27 19:26:30,187 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 204 [2023-01-27 19:26:30,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:26:30,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:26:30,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:26:30,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:26:30,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:26:30" (1/1) ... [2023-01-27 19:26:30,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:26:30" (1/1) ... [2023-01-27 19:26:30,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:26:30" (1/1) ... [2023-01-27 19:26:30,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:26:30" (1/1) ... [2023-01-27 19:26:30,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:26:30" (1/1) ... [2023-01-27 19:26:30,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:26:30" (1/1) ... [2023-01-27 19:26:30,220 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:26:30" (1/1) ... [2023-01-27 19:26:30,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:26:30" (1/1) ... [2023-01-27 19:26:30,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:26:30,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:26:30,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:26:30,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:26:30,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:26:30" (1/1) ... [2023-01-27 19:26:30,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:26:30,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:26:30,253 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 19:26:30,272 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 19:26:30,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:26:30,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:26:30,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:26:30,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:26:30,290 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:26:30,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:26:30,290 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:26:30,290 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:26:30,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:26:30,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:26:30,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:26:30,292 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 19:26:30,414 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:26:30,415 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:26:30,693 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:26:30,700 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:26:30,700 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-01-27 19:26:30,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:26:30 BoogieIcfgContainer [2023-01-27 19:26:30,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:26:30,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:26:30,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:26:30,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:26:30,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:26:29" (1/3) ... [2023-01-27 19:26:30,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9938f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:26:30, skipping insertion in model container [2023-01-27 19:26:30,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:26:30" (2/3) ... [2023-01-27 19:26:30,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9938f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:26:30, skipping insertion in model container [2023-01-27 19:26:30,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:26:30" (3/3) ... [2023-01-27 19:26:30,710 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_79-equ_racefree.i [2023-01-27 19:26:30,724 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:26:30,724 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-27 19:26:30,725 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:26:30,773 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:26:30,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 201 transitions, 410 flow [2023-01-27 19:26:30,855 INFO L130 PetriNetUnfolder]: 43/271 cut-off events. [2023-01-27 19:26:30,856 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:26:30,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 271 events. 43/271 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 823 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-01-27 19:26:30,865 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 201 transitions, 410 flow [2023-01-27 19:26:30,869 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 194 transitions, 393 flow [2023-01-27 19:26:30,871 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:26:30,878 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 194 transitions, 393 flow [2023-01-27 19:26:30,879 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 194 transitions, 393 flow [2023-01-27 19:26:30,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 194 transitions, 393 flow [2023-01-27 19:26:30,932 INFO L130 PetriNetUnfolder]: 41/264 cut-off events. [2023-01-27 19:26:30,936 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:26:30,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 41/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 803 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-01-27 19:26:30,942 INFO L119 LiptonReduction]: Number of co-enabled transitions 8664 [2023-01-27 19:26:36,814 INFO L134 LiptonReduction]: Checked pairs total: 18412 [2023-01-27 19:26:36,815 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-01-27 19:26:36,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:26:36,830 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;@1c6d9436, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:26:36,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 19:26:36,836 INFO L130 PetriNetUnfolder]: 6/23 cut-off events. [2023-01-27 19:26:36,836 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:26:36,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:26:36,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:26:36,837 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:26:36,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:26:36,840 INFO L85 PathProgramCache]: Analyzing trace with hash 733617857, now seen corresponding path program 1 times [2023-01-27 19:26:36,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:26:36,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704088659] [2023-01-27 19:26:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:26:36,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:26:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:26:37,105 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 19:26:37,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:26:37,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704088659] [2023-01-27 19:26:37,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704088659] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:26:37,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:26:37,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:26:37,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843032844] [2023-01-27 19:26:37,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:26:37,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:26:37,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:26:37,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:26:37,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:26:37,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 367 [2023-01-27 19:26:37,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 64 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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 19:26:37,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:26:37,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 367 [2023-01-27 19:26:37,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:26:37,237 INFO L130 PetriNetUnfolder]: 274/651 cut-off events. [2023-01-27 19:26:37,238 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:26:37,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 651 events. 274/651 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3505 event pairs, 0 based on Foata normal form. 119/685 useless extension candidates. Maximal degree in co-relation 1175. Up to 529 conditions per place. [2023-01-27 19:26:37,243 INFO L137 encePairwiseOnDemand]: 342/367 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-01-27 19:26:37,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 225 flow [2023-01-27 19:26:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:26:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:26:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 582 transitions. [2023-01-27 19:26:37,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286103542234333 [2023-01-27 19:26:37,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 582 transitions. [2023-01-27 19:26:37,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 582 transitions. [2023-01-27 19:26:37,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:26:37,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 582 transitions. [2023-01-27 19:26:37,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 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 19:26:37,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 19:26:37,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 19:26:37,266 INFO L175 Difference]: Start difference. First operand has 44 places, 64 transitions, 133 flow. Second operand 3 states and 582 transitions. [2023-01-27 19:26:37,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 225 flow [2023-01-27 19:26:37,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:26:37,270 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 97 flow [2023-01-27 19:26:37,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-01-27 19:26:37,280 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-01-27 19:26:37,280 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 97 flow [2023-01-27 19:26:37,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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 19:26:37,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:26:37,281 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:26:37,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:26:37,281 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:26:37,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:26:37,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1260636167, now seen corresponding path program 1 times [2023-01-27 19:26:37,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:26:37,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809409659] [2023-01-27 19:26:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:26:37,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:26:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:26:37,326 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:26:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:26:37,363 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:26:37,363 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:26:37,364 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 19:26:37,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 19:26:37,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 19:26:37,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 19:26:37,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:26:37,366 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:26:37,371 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:26:37,371 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:26:37,388 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:26:37,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 260 transitions, 538 flow [2023-01-27 19:26:37,422 INFO L130 PetriNetUnfolder]: 72/424 cut-off events. [2023-01-27 19:26:37,423 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:26:37,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 72/424 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1596 event pairs, 0 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 273. Up to 12 conditions per place. [2023-01-27 19:26:37,425 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 260 transitions, 538 flow [2023-01-27 19:26:37,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 258 transitions, 534 flow [2023-01-27 19:26:37,428 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:26:37,428 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 258 transitions, 534 flow [2023-01-27 19:26:37,428 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 258 transitions, 534 flow [2023-01-27 19:26:37,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 258 transitions, 534 flow [2023-01-27 19:26:37,459 INFO L130 PetriNetUnfolder]: 71/422 cut-off events. [2023-01-27 19:26:37,459 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:26:37,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 422 events. 71/422 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1612 event pairs, 0 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2023-01-27 19:26:37,473 INFO L119 LiptonReduction]: Number of co-enabled transitions 25080 [2023-01-27 19:26:43,312 INFO L134 LiptonReduction]: Checked pairs total: 57220 [2023-01-27 19:26:43,312 INFO L136 LiptonReduction]: Total number of compositions: 206 [2023-01-27 19:26:43,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:26:43,314 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;@1c6d9436, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:26:43,314 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 19:26:43,316 INFO L130 PetriNetUnfolder]: 7/28 cut-off events. [2023-01-27 19:26:43,316 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:26:43,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:26:43,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:26:43,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:26:43,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:26:43,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1234424057, now seen corresponding path program 1 times [2023-01-27 19:26:43,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:26:43,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129034378] [2023-01-27 19:26:43,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:26:43,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:26:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:26:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:26:43,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:26:43,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129034378] [2023-01-27 19:26:43,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129034378] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:26:43,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:26:43,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:26:43,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265506978] [2023-01-27 19:26:43,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:26:43,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:26:43,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:26:43,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:26:43,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:26:43,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 466 [2023-01-27 19:26:43,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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 19:26:43,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:26:43,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 466 [2023-01-27 19:26:43,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:26:44,134 INFO L130 PetriNetUnfolder]: 8903/13936 cut-off events. [2023-01-27 19:26:44,135 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2023-01-27 19:26:44,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26898 conditions, 13936 events. 8903/13936 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 93141 event pairs, 6020 based on Foata normal form. 3325/15003 useless extension candidates. Maximal degree in co-relation 11579. Up to 12844 conditions per place. [2023-01-27 19:26:44,191 INFO L137 encePairwiseOnDemand]: 432/466 looper letters, 66 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-01-27 19:26:44,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 83 transitions, 320 flow [2023-01-27 19:26:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:26:44,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:26:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2023-01-27 19:26:44,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314735336194564 [2023-01-27 19:26:44,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2023-01-27 19:26:44,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2023-01-27 19:26:44,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:26:44,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2023-01-27 19:26:44,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 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 19:26:44,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 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 19:26:44,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 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 19:26:44,291 INFO L175 Difference]: Start difference. First operand has 67 places, 98 transitions, 214 flow. Second operand 3 states and 743 transitions. [2023-01-27 19:26:44,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 83 transitions, 320 flow [2023-01-27 19:26:44,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:26:44,293 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 164 flow [2023-01-27 19:26:44,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=67, 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=164, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-01-27 19:26:44,294 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-01-27 19:26:44,294 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 164 flow [2023-01-27 19:26:44,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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 19:26:44,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:26:44,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:26:44,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:26:44,295 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:26:44,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:26:44,295 INFO L85 PathProgramCache]: Analyzing trace with hash 705268624, now seen corresponding path program 1 times [2023-01-27 19:26:44,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:26:44,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637100403] [2023-01-27 19:26:44,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:26:44,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:26:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:26:44,517 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 19:26:44,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:26:44,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637100403] [2023-01-27 19:26:44,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637100403] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:26:44,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:26:44,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:26:44,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918087608] [2023-01-27 19:26:44,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:26:44,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 19:26:44,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:26:44,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 19:26:44,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-27 19:26:44,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 466 [2023-01-27 19:26:44,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 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 19:26:44,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:26:44,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 466 [2023-01-27 19:26:44,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:26:45,453 INFO L130 PetriNetUnfolder]: 10882/17631 cut-off events. [2023-01-27 19:26:45,453 INFO L131 PetriNetUnfolder]: For 749/749 co-relation queries the response was YES. [2023-01-27 19:26:45,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35061 conditions, 17631 events. 10882/17631 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 128419 event pairs, 3228 based on Foata normal form. 0/15427 useless extension candidates. Maximal degree in co-relation 34953. Up to 10910 conditions per place. [2023-01-27 19:26:45,510 INFO L137 encePairwiseOnDemand]: 453/466 looper letters, 114 selfloop transitions, 13 changer transitions 8/150 dead transitions. [2023-01-27 19:26:45,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 150 transitions, 626 flow [2023-01-27 19:26:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 19:26:45,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 19:26:45,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 805 transitions. [2023-01-27 19:26:45,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43186695278969955 [2023-01-27 19:26:45,512 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 805 transitions. [2023-01-27 19:26:45,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 805 transitions. [2023-01-27 19:26:45,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:26:45,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 805 transitions. [2023-01-27 19:26:45,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 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 19:26:45,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 466.0) internal successors, (2330), 5 states have internal predecessors, (2330), 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 19:26:45,518 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 466.0) internal successors, (2330), 5 states have internal predecessors, (2330), 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 19:26:45,518 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 164 flow. Second operand 4 states and 805 transitions. [2023-01-27 19:26:45,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 150 transitions, 626 flow [2023-01-27 19:26:45,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 150 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:26:45,524 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 268 flow [2023-01-27 19:26:45,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2023-01-27 19:26:45,526 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-01-27 19:26:45,526 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 268 flow [2023-01-27 19:26:45,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 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 19:26:45,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:26:45,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:26:45,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 19:26:45,533 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:26:45,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:26:45,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2087176397, now seen corresponding path program 1 times [2023-01-27 19:26:45,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:26:45,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437100878] [2023-01-27 19:26:45,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:26:45,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:26:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:26:45,600 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 19:26:45,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:26:45,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437100878] [2023-01-27 19:26:45,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437100878] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:26:45,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293658114] [2023-01-27 19:26:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:26:45,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:26:45,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:26:45,604 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 19:26:45,608 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 19:26:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:26:45,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:26:45,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:26:46,206 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 19:26:46,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:26:46,219 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 19:26:46,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293658114] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:26:46,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:26:46,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-27 19:26:46,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453873530] [2023-01-27 19:26:46,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:26:46,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:26:46,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:26:46,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:26:46,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-27 19:26:46,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 466 [2023-01-27 19:26:46,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 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 19:26:46,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:26:46,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 466 [2023-01-27 19:26:46,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:26:46,399 INFO L130 PetriNetUnfolder]: 1325/2516 cut-off events. [2023-01-27 19:26:46,399 INFO L131 PetriNetUnfolder]: For 1094/1094 co-relation queries the response was YES. [2023-01-27 19:26:46,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6395 conditions, 2516 events. 1325/2516 cut-off events. For 1094/1094 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16013 event pairs, 34 based on Foata normal form. 296/2716 useless extension candidates. Maximal degree in co-relation 2424. Up to 1598 conditions per place. [2023-01-27 19:26:46,410 INFO L137 encePairwiseOnDemand]: 463/466 looper letters, 89 selfloop transitions, 3 changer transitions 0/101 dead transitions. [2023-01-27 19:26:46,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 101 transitions, 514 flow [2023-01-27 19:26:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:26:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:26:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1136 transitions. [2023-01-27 19:26:46,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875536480686695 [2023-01-27 19:26:46,413 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1136 transitions. [2023-01-27 19:26:46,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1136 transitions. [2023-01-27 19:26:46,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:26:46,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1136 transitions. [2023-01-27 19:26:46,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 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 19:26:46,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 466.0) internal successors, (2796), 6 states have internal predecessors, (2796), 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 19:26:46,419 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 466.0) internal successors, (2796), 6 states have internal predecessors, (2796), 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 19:26:46,419 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 268 flow. Second operand 5 states and 1136 transitions. [2023-01-27 19:26:46,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 101 transitions, 514 flow [2023-01-27 19:26:46,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 101 transitions, 512 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-27 19:26:46,425 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 178 flow [2023-01-27 19:26:46,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-01-27 19:26:46,426 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-01-27 19:26:46,426 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 178 flow [2023-01-27 19:26:46,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 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 19:26:46,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:26:46,427 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:26:46,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 19:26:46,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:26:46,633 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:26:46,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:26:46,633 INFO L85 PathProgramCache]: Analyzing trace with hash -147922955, now seen corresponding path program 1 times [2023-01-27 19:26:46,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:26:46,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784021661] [2023-01-27 19:26:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:26:46,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:26:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:26:46,646 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:26:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:26:46,656 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:26:46,656 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:26:46,657 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 19:26:46,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 19:26:46,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 19:26:46,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 19:26:46,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 19:26:46,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:26:46,657 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-01-27 19:26:46,658 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:26:46,658 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:26:46,673 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:26:46,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 319 transitions, 668 flow [2023-01-27 19:26:46,742 INFO L130 PetriNetUnfolder]: 106/608 cut-off events. [2023-01-27 19:26:46,742 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:26:46,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 608 events. 106/608 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2559 event pairs, 1 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-01-27 19:26:46,747 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 319 transitions, 668 flow [2023-01-27 19:26:46,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 317 transitions, 664 flow [2023-01-27 19:26:46,751 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:26:46,751 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 270 places, 317 transitions, 664 flow [2023-01-27 19:26:46,751 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 270 places, 317 transitions, 664 flow [2023-01-27 19:26:46,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 317 transitions, 664 flow [2023-01-27 19:26:46,805 INFO L130 PetriNetUnfolder]: 105/606 cut-off events. [2023-01-27 19:26:46,805 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:26:46,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 606 events. 105/606 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2552 event pairs, 1 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 430. Up to 16 conditions per place. [2023-01-27 19:26:46,827 INFO L119 LiptonReduction]: Number of co-enabled transitions 47880 [2023-01-27 19:26:51,759 INFO L134 LiptonReduction]: Checked pairs total: 102219 [2023-01-27 19:26:51,759 INFO L136 LiptonReduction]: Total number of compositions: 243 [2023-01-27 19:26:51,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:26:51,769 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;@1c6d9436, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:26:51,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 19:26:51,770 INFO L130 PetriNetUnfolder]: 7/28 cut-off events. [2023-01-27 19:26:51,770 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:26:51,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:26:51,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:26:51,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:26:51,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:26:51,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1826810000, now seen corresponding path program 1 times [2023-01-27 19:26:51,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:26:51,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867213446] [2023-01-27 19:26:51,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:26:51,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:26:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:26:51,798 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 19:26:51,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:26:51,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867213446] [2023-01-27 19:26:51,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867213446] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:26:51,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:26:51,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:26:51,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040420221] [2023-01-27 19:26:51,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:26:51,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:26:51,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:26:51,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:26:51,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:26:51,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 562 [2023-01-27 19:26:51,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 128 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:26:51,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:26:51,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 562 [2023-01-27 19:26:51,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:27:05,160 INFO L130 PetriNetUnfolder]: 187412/264945 cut-off events. [2023-01-27 19:27:05,161 INFO L131 PetriNetUnfolder]: For 3117/3117 co-relation queries the response was YES. [2023-01-27 19:27:05,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511892 conditions, 264945 events. 187412/264945 cut-off events. For 3117/3117 co-relation queries the response was YES. Maximal size of possible extension queue 7417. Compared 2100407 event pairs, 115799 based on Foata normal form. 66267/288059 useless extension candidates. Maximal degree in co-relation 25647. Up to 244876 conditions per place. [2023-01-27 19:27:06,389 INFO L137 encePairwiseOnDemand]: 518/562 looper letters, 82 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-01-27 19:27:06,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 104 transitions, 406 flow [2023-01-27 19:27:06,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:27:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:27:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 904 transitions. [2023-01-27 19:27:06,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361803084223014 [2023-01-27 19:27:06,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 904 transitions. [2023-01-27 19:27:06,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 904 transitions. [2023-01-27 19:27:06,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:27:06,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 904 transitions. [2023-01-27 19:27:06,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 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 19:27:06,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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 19:27:06,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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 19:27:06,397 INFO L175 Difference]: Start difference. First operand has 87 places, 128 transitions, 286 flow. Second operand 3 states and 904 transitions. [2023-01-27 19:27:06,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 104 transitions, 406 flow [2023-01-27 19:27:06,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 104 transitions, 406 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:27:06,401 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 216 flow [2023-01-27 19:27:06,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2023-01-27 19:27:06,401 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-01-27 19:27:06,402 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 216 flow [2023-01-27 19:27:06,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:27:06,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:27:06,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:27:06,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 19:27:06,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:27:06,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:27:06,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1853768516, now seen corresponding path program 1 times [2023-01-27 19:27:06,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:27:06,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737638214] [2023-01-27 19:27:06,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:27:06,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:27:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:27:06,486 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 19:27:06,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:27:06,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737638214] [2023-01-27 19:27:06,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737638214] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:27:06,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:27:06,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:27:06,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457252211] [2023-01-27 19:27:06,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:27:06,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 19:27:06,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:27:06,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 19:27:06,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-27 19:27:06,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 562 [2023-01-27 19:27:06,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 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 19:27:06,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:27:06,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 562 [2023-01-27 19:27:06,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:27:25,496 INFO L130 PetriNetUnfolder]: 274890/389129 cut-off events. [2023-01-27 19:27:25,497 INFO L131 PetriNetUnfolder]: For 15087/15087 co-relation queries the response was YES. [2023-01-27 19:27:26,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773348 conditions, 389129 events. 274890/389129 cut-off events. For 15087/15087 co-relation queries the response was YES. Maximal size of possible extension queue 12022. Compared 3221217 event pairs, 65708 based on Foata normal form. 0/342659 useless extension candidates. Maximal degree in co-relation 773234. Up to 236492 conditions per place. [2023-01-27 19:27:27,019 INFO L137 encePairwiseOnDemand]: 545/562 looper letters, 160 selfloop transitions, 18 changer transitions 0/197 dead transitions. [2023-01-27 19:27:27,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 197 transitions, 838 flow [2023-01-27 19:27:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 19:27:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 19:27:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1002 transitions. [2023-01-27 19:27:27,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445729537366548 [2023-01-27 19:27:27,022 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1002 transitions. [2023-01-27 19:27:27,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1002 transitions. [2023-01-27 19:27:27,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:27:27,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1002 transitions. [2023-01-27 19:27:27,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 250.5) internal successors, (1002), 4 states have internal predecessors, (1002), 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 19:27:27,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 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 19:27:27,026 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 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 19:27:27,026 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 216 flow. Second operand 4 states and 1002 transitions. [2023-01-27 19:27:27,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 197 transitions, 838 flow [2023-01-27 19:27:27,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 197 transitions, 835 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:27:27,037 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 358 flow [2023-01-27 19:27:27,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=358, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2023-01-27 19:27:27,039 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 8 predicate places. [2023-01-27 19:27:27,039 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 358 flow [2023-01-27 19:27:27,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 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 19:27:27,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:27:27,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:27:27,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 19:27:27,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:27:27,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:27:27,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1382282695, now seen corresponding path program 1 times [2023-01-27 19:27:27,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:27:27,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541551369] [2023-01-27 19:27:27,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:27:27,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:27:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:27:27,087 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 19:27:27,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:27:27,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541551369] [2023-01-27 19:27:27,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541551369] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:27:27,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240773572] [2023-01-27 19:27:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:27:27,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:27:27,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:27:27,089 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 19:27:27,092 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 19:27:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:27:27,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:27:27,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:27:27,219 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 19:27:27,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:27:27,231 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 19:27:27,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240773572] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:27:27,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:27:27,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-27 19:27:27,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689136169] [2023-01-27 19:27:27,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:27:27,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:27:27,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:27:27,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:27:27,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-27 19:27:27,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 562 [2023-01-27 19:27:27,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 358 flow. Second operand has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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 19:27:27,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:27:27,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 562 [2023-01-27 19:27:27,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:27:30,213 INFO L130 PetriNetUnfolder]: 34569/53460 cut-off events. [2023-01-27 19:27:30,213 INFO L131 PetriNetUnfolder]: For 31009/31009 co-relation queries the response was YES. [2023-01-27 19:27:30,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137769 conditions, 53460 events. 34569/53460 cut-off events. For 31009/31009 co-relation queries the response was YES. Maximal size of possible extension queue 2171. Compared 422777 event pairs, 1098 based on Foata normal form. 4795/55809 useless extension candidates. Maximal degree in co-relation 38669. Up to 33981 conditions per place. [2023-01-27 19:27:30,459 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 165 selfloop transitions, 4 changer transitions 0/183 dead transitions. [2023-01-27 19:27:30,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 183 transitions, 961 flow [2023-01-27 19:27:30,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:27:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:27:30,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1676 transitions. [2023-01-27 19:27:30,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970344009489917 [2023-01-27 19:27:30,462 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1676 transitions. [2023-01-27 19:27:30,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1676 transitions. [2023-01-27 19:27:30,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:27:30,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1676 transitions. [2023-01-27 19:27:30,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 279.3333333333333) internal successors, (1676), 6 states have internal predecessors, (1676), 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 19:27:30,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 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 19:27:30,469 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 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 19:27:30,469 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 358 flow. Second operand 6 states and 1676 transitions. [2023-01-27 19:27:30,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 183 transitions, 961 flow [2023-01-27 19:27:30,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 183 transitions, 955 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-01-27 19:27:30,493 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 273 flow [2023-01-27 19:27:30,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2023-01-27 19:27:30,494 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -8 predicate places. [2023-01-27 19:27:30,494 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 273 flow [2023-01-27 19:27:30,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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 19:27:30,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:27:30,494 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:27:30,502 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 19:27:30,702 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,SelfDestructingSolverStorable8 [2023-01-27 19:27:30,703 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:27:30,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:27:30,703 INFO L85 PathProgramCache]: Analyzing trace with hash -943329716, now seen corresponding path program 1 times [2023-01-27 19:27:30,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:27:30,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122715417] [2023-01-27 19:27:30,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:27:30,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:27:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:27:30,719 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:27:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:27:30,736 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:27:30,736 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:27:30,737 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 19:27:30,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 19:27:30,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-27 19:27:30,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 19:27:30,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 19:27:30,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 19:27:30,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 19:27:30,737 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-01-27 19:27:30,738 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:27:30,738 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:27:30,760 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:27:30,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 378 transitions, 800 flow [2023-01-27 19:27:30,840 INFO L130 PetriNetUnfolder]: 152/856 cut-off events. [2023-01-27 19:27:30,840 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:27:30,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 856 events. 152/856 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3889 event pairs, 6 based on Foata normal form. 0/695 useless extension candidates. Maximal degree in co-relation 628. Up to 32 conditions per place. [2023-01-27 19:27:30,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 319 places, 378 transitions, 800 flow [2023-01-27 19:27:30,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 376 transitions, 796 flow [2023-01-27 19:27:30,854 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:27:30,854 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 318 places, 376 transitions, 796 flow [2023-01-27 19:27:30,854 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 318 places, 376 transitions, 796 flow [2023-01-27 19:27:30,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 376 transitions, 796 flow [2023-01-27 19:27:30,930 INFO L130 PetriNetUnfolder]: 151/854 cut-off events. [2023-01-27 19:27:30,930 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:27:30,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 854 events. 151/854 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3888 event pairs, 6 based on Foata normal form. 0/694 useless extension candidates. Maximal degree in co-relation 626. Up to 32 conditions per place. [2023-01-27 19:27:30,965 INFO L119 LiptonReduction]: Number of co-enabled transitions 77520 [2023-01-27 19:27:35,989 INFO L134 LiptonReduction]: Checked pairs total: 171843 [2023-01-27 19:27:35,989 INFO L136 LiptonReduction]: Total number of compositions: 293 [2023-01-27 19:27:35,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:27:35,990 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;@1c6d9436, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:27:35,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 19:27:35,992 INFO L130 PetriNetUnfolder]: 7/28 cut-off events. [2023-01-27 19:27:35,992 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:27:35,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:27:35,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:27:35,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 19:27:35,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:27:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1771787102, now seen corresponding path program 1 times [2023-01-27 19:27:35,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:27:35,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867591174] [2023-01-27 19:27:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:27:35,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:27:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:27:36,019 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 19:27:36,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:27:36,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867591174] [2023-01-27 19:27:36,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867591174] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:27:36,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:27:36,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:27:36,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409072520] [2023-01-27 19:27:36,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:27:36,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:27:36,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:27:36,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:27:36,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:27:36,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 671 [2023-01-27 19:27:36,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 162 transitions, 368 flow. Second operand has 3 states, 3 states have (on average 302.3333333333333) internal successors, (907), 3 states have internal predecessors, (907), 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 19:27:36,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:27:36,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 671 [2023-01-27 19:27:36,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand