/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 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 07:53:21,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 07:53:21,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 07:53:21,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 07:53:21,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 07:53:21,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 07:53:21,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 07:53:21,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 07:53:21,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 07:53:21,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 07:53:21,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 07:53:21,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 07:53:21,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 07:53:21,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 07:53:21,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 07:53:21,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 07:53:21,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 07:53:21,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 07:53:21,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 07:53:21,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 07:53:21,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 07:53:21,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 07:53:21,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 07:53:21,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 07:53:21,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 07:53:21,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 07:53:21,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 07:53:21,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 07:53:21,339 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 [2023-01-28 07:53:21,358 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 07:53:21,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 07:53:21,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 07:53:21,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 07:53:21,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 07:53:21,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 07:53:21,360 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 07:53:21,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 07:53:21,360 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 07:53:21,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 07:53:21,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 07:53:21,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 07:53:21,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 07:53:21,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 07:53:21,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 07:53:21,361 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 07:53:21,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 07:53:21,361 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 07:53:21,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 07:53:21,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 07:53:21,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 07:53:21,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 07:53:21,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 07:53:21,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:53:21,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 07:53:21,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 07:53:21,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 07:53:21,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 07:53:21,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 07:53:21,362 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 07:53:21,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 07:53:21,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 07:53:21,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 07:53:21,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 07:53:21,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 07:53:21,551 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 07:53:21,552 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 07:53:21,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-01-28 07:53:22,613 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 07:53:22,838 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 07:53:22,839 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-01-28 07:53:22,850 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8505de095/9b7cf903552a4e469b53fb9f95634eaf/FLAG2ae9015b3 [2023-01-28 07:53:22,863 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8505de095/9b7cf903552a4e469b53fb9f95634eaf [2023-01-28 07:53:22,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 07:53:22,866 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 07:53:22,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 07:53:22,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 07:53:22,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 07:53:22,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:53:22" (1/1) ... [2023-01-28 07:53:22,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@165b0ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:22, skipping insertion in model container [2023-01-28 07:53:22,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:53:22" (1/1) ... [2023-01-28 07:53:22,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 07:53:22,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 07:53:23,161 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_27-funptr_racing.i[41323,41336] [2023-01-28 07:53:23,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:53:23,186 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 07:53:23,207 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_27-funptr_racing.i[41323,41336] [2023-01-28 07:53:23,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:53:23,271 WARN L667 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 07:53:23,276 INFO L208 MainTranslator]: Completed translation [2023-01-28 07:53:23,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:23 WrapperNode [2023-01-28 07:53:23,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 07:53:23,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 07:53:23,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 07:53:23,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 07:53:23,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:23" (1/1) ... [2023-01-28 07:53:23,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:23" (1/1) ... [2023-01-28 07:53:23,322 INFO L138 Inliner]: procedures = 273, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 148 [2023-01-28 07:53:23,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 07:53:23,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 07:53:23,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 07:53:23,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 07:53:23,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:23" (1/1) ... [2023-01-28 07:53:23,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:23" (1/1) ... [2023-01-28 07:53:23,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:23" (1/1) ... [2023-01-28 07:53:23,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:23" (1/1) ... [2023-01-28 07:53:23,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:23" (1/1) ... [2023-01-28 07:53:23,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:23" (1/1) ... [2023-01-28 07:53:23,339 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:23" (1/1) ... [2023-01-28 07:53:23,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:23" (1/1) ... [2023-01-28 07:53:23,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 07:53:23,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 07:53:23,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 07:53:23,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 07:53:23,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:23" (1/1) ... [2023-01-28 07:53:23,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:53:23,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:53:23,378 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) [2023-01-28 07:53:23,397 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 [2023-01-28 07:53:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 07:53:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 07:53:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 07:53:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 07:53:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 07:53:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 07:53:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 07:53:23,432 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 07:53:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 07:53:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 07:53:23,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 07:53:23,433 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 07:53:23,566 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 07:53:23,567 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 07:53:23,764 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 07:53:23,770 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 07:53:23,770 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-01-28 07:53:23,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:53:23 BoogieIcfgContainer [2023-01-28 07:53:23,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 07:53:23,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 07:53:23,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 07:53:23,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 07:53:23,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 07:53:22" (1/3) ... [2023-01-28 07:53:23,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef7d3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:53:23, skipping insertion in model container [2023-01-28 07:53:23,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:23" (2/3) ... [2023-01-28 07:53:23,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef7d3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:53:23, skipping insertion in model container [2023-01-28 07:53:23,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:53:23" (3/3) ... [2023-01-28 07:53:23,783 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2023-01-28 07:53:23,795 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 07:53:23,796 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 07:53:23,796 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 07:53:23,844 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 07:53:23,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 145 transitions, 298 flow [2023-01-28 07:53:23,954 INFO L130 PetriNetUnfolder]: 24/182 cut-off events. [2023-01-28 07:53:23,954 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:53:23,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 182 events. 24/182 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 486 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 104. Up to 4 conditions per place. [2023-01-28 07:53:23,960 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 145 transitions, 298 flow [2023-01-28 07:53:23,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 140 transitions, 285 flow [2023-01-28 07:53:23,969 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:23,986 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 140 transitions, 285 flow [2023-01-28 07:53:23,987 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 140 transitions, 285 flow [2023-01-28 07:53:23,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 140 transitions, 285 flow [2023-01-28 07:53:24,028 INFO L130 PetriNetUnfolder]: 23/177 cut-off events. [2023-01-28 07:53:24,028 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:24,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 177 events. 23/177 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 478 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 104. Up to 4 conditions per place. [2023-01-28 07:53:24,033 INFO L119 LiptonReduction]: Number of co-enabled transitions 5332 [2023-01-28 07:53:26,749 INFO L134 LiptonReduction]: Checked pairs total: 11408 [2023-01-28 07:53:26,749 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-01-28 07:53:26,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:53:26,770 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;@709122b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:26,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:26,776 INFO L130 PetriNetUnfolder]: 2/25 cut-off events. [2023-01-28 07:53:26,776 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:26,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:26,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:53:26,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:26,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:26,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1779853269, now seen corresponding path program 1 times [2023-01-28 07:53:26,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:26,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598470245] [2023-01-28 07:53:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:26,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:26,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:26,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598470245] [2023-01-28 07:53:26,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598470245] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:53:26,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:53:26,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:53:26,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736517781] [2023-01-28 07:53:26,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:53:27,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:53:27,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:27,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:53:27,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:53:27,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 253 [2023-01-28 07:53:27,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 51 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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) [2023-01-28 07:53:27,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:27,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 253 [2023-01-28 07:53:27,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:27,131 INFO L130 PetriNetUnfolder]: 188/417 cut-off events. [2023-01-28 07:53:27,131 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:27,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 417 events. 188/417 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1858 event pairs, 150 based on Foata normal form. 24/393 useless extension candidates. Maximal degree in co-relation 803. Up to 375 conditions per place. [2023-01-28 07:53:27,138 INFO L137 encePairwiseOnDemand]: 235/253 looper letters, 41 selfloop transitions, 2 changer transitions 6/54 dead transitions. [2023-01-28 07:53:27,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 209 flow [2023-01-28 07:53:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:53:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:53:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 430 transitions. [2023-01-28 07:53:27,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5665349143610013 [2023-01-28 07:53:27,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 430 transitions. [2023-01-28 07:53:27,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 430 transitions. [2023-01-28 07:53:27,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:27,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 430 transitions. [2023-01-28 07:53:27,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 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) [2023-01-28 07:53:27,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 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) [2023-01-28 07:53:27,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 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) [2023-01-28 07:53:27,159 INFO L175 Difference]: Start difference. First operand has 39 places, 51 transitions, 107 flow. Second operand 3 states and 430 transitions. [2023-01-28 07:53:27,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 209 flow [2023-01-28 07:53:27,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:53:27,162 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 73 flow [2023-01-28 07:53:27,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-01-28 07:53:27,166 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-01-28 07:53:27,166 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 73 flow [2023-01-28 07:53:27,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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) [2023-01-28 07:53:27,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:27,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:53:27,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 07:53:27,167 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:27,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:27,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1258404404, now seen corresponding path program 1 times [2023-01-28 07:53:27,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:27,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270367039] [2023-01-28 07:53:27,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:27,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:27,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:27,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270367039] [2023-01-28 07:53:27,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270367039] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:53:27,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562345051] [2023-01-28 07:53:27,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:27,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:53:27,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:53:27,230 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) [2023-01-28 07:53:27,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 07:53:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:27,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:53:27,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:53:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:27,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:53:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:27,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562345051] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:53:27,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:53:27,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:53:27,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868163185] [2023-01-28 07:53:27,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:53:27,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:53:27,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:27,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:53:27,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:53:27,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 253 [2023-01-28 07:53:27,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 120.57142857142857) internal successors, (844), 7 states have internal predecessors, (844), 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) [2023-01-28 07:53:27,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:27,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 253 [2023-01-28 07:53:27,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:27,398 INFO L130 PetriNetUnfolder]: 35/92 cut-off events. [2023-01-28 07:53:27,398 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 07:53:27,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 92 events. 35/92 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 300 event pairs, 0 based on Foata normal form. 17/106 useless extension candidates. Maximal degree in co-relation 208. Up to 68 conditions per place. [2023-01-28 07:53:27,399 INFO L137 encePairwiseOnDemand]: 250/253 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-01-28 07:53:27,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 43 transitions, 173 flow [2023-01-28 07:53:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:53:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:53:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 512 transitions. [2023-01-28 07:53:27,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059288537549407 [2023-01-28 07:53:27,401 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 512 transitions. [2023-01-28 07:53:27,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 512 transitions. [2023-01-28 07:53:27,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:27,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 512 transitions. [2023-01-28 07:53:27,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:27,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 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) [2023-01-28 07:53:27,405 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 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) [2023-01-28 07:53:27,405 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 73 flow. Second operand 4 states and 512 transitions. [2023-01-28 07:53:27,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 43 transitions, 173 flow [2023-01-28 07:53:27,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 167 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 07:53:27,406 INFO L231 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2023-01-28 07:53:27,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2023-01-28 07:53:27,406 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2023-01-28 07:53:27,406 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2023-01-28 07:53:27,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.57142857142857) internal successors, (844), 7 states have internal predecessors, (844), 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) [2023-01-28 07:53:27,409 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:53:27,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 07:53:27,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:53:27,613 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:53:27,615 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:53:27,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 145 transitions, 298 flow [2023-01-28 07:53:27,629 INFO L130 PetriNetUnfolder]: 24/182 cut-off events. [2023-01-28 07:53:27,629 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:53:27,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 182 events. 24/182 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 486 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 104. Up to 4 conditions per place. [2023-01-28 07:53:27,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 145 transitions, 298 flow [2023-01-28 07:53:27,634 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 140 transitions, 285 flow [2023-01-28 07:53:27,634 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:27,634 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 140 transitions, 285 flow [2023-01-28 07:53:27,634 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 140 transitions, 285 flow [2023-01-28 07:53:27,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 140 transitions, 285 flow [2023-01-28 07:53:27,645 INFO L130 PetriNetUnfolder]: 23/177 cut-off events. [2023-01-28 07:53:27,645 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:27,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 177 events. 23/177 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 478 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 104. Up to 4 conditions per place. [2023-01-28 07:53:27,647 INFO L119 LiptonReduction]: Number of co-enabled transitions 5332 [2023-01-28 07:53:29,987 INFO L134 LiptonReduction]: Checked pairs total: 10302 [2023-01-28 07:53:29,987 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-01-28 07:53:29,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:53:29,989 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;@709122b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:29,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:29,991 INFO L130 PetriNetUnfolder]: 0/12 cut-off events. [2023-01-28 07:53:29,991 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:29,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:29,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 07:53:29,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:53:29,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:29,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1419088883, now seen corresponding path program 1 times [2023-01-28 07:53:29,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:29,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870469670] [2023-01-28 07:53:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:29,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:53:30,026 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:53:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:53:30,063 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:53:30,064 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:53:30,064 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:53:30,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 07:53:30,064 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:53:30,065 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:53:30,065 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:53:30,065 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 07:53:30,080 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 07:53:30,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 209 transitions, 436 flow [2023-01-28 07:53:30,110 INFO L130 PetriNetUnfolder]: 45/307 cut-off events. [2023-01-28 07:53:30,110 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:53:30,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 307 events. 45/307 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1043 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-01-28 07:53:30,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 209 transitions, 436 flow [2023-01-28 07:53:30,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 209 transitions, 436 flow [2023-01-28 07:53:30,114 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:30,114 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 209 transitions, 436 flow [2023-01-28 07:53:30,114 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 209 transitions, 436 flow [2023-01-28 07:53:30,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 209 transitions, 436 flow [2023-01-28 07:53:30,134 INFO L130 PetriNetUnfolder]: 45/307 cut-off events. [2023-01-28 07:53:30,134 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:53:30,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 307 events. 45/307 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1043 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-01-28 07:53:30,143 INFO L119 LiptonReduction]: Number of co-enabled transitions 19716 [2023-01-28 07:53:32,810 INFO L134 LiptonReduction]: Checked pairs total: 60343 [2023-01-28 07:53:32,810 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-01-28 07:53:32,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:53:32,812 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;@709122b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:32,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:32,814 INFO L130 PetriNetUnfolder]: 4/29 cut-off events. [2023-01-28 07:53:32,815 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:53:32,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:32,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:53:32,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:32,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:32,815 INFO L85 PathProgramCache]: Analyzing trace with hash -935971945, now seen corresponding path program 1 times [2023-01-28 07:53:32,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:32,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407211953] [2023-01-28 07:53:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:32,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:32,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:32,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407211953] [2023-01-28 07:53:32,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407211953] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:53:32,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:53:32,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:53:32,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347903067] [2023-01-28 07:53:32,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:53:32,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:53:32,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:32,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:53:32,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:53:32,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 349 [2023-01-28 07:53:32,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 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) [2023-01-28 07:53:32,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:32,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 349 [2023-01-28 07:53:32,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:33,785 INFO L130 PetriNetUnfolder]: 8909/15017 cut-off events. [2023-01-28 07:53:33,785 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2023-01-28 07:53:33,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28856 conditions, 15017 events. 8909/15017 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 110390 event pairs, 3944 based on Foata normal form. 1745/15009 useless extension candidates. Maximal degree in co-relation 1911. Up to 13678 conditions per place. [2023-01-28 07:53:33,846 INFO L137 encePairwiseOnDemand]: 319/349 looper letters, 66 selfloop transitions, 2 changer transitions 10/93 dead transitions. [2023-01-28 07:53:33,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 356 flow [2023-01-28 07:53:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:53:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:53:33,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-01-28 07:53:33,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5921680993314231 [2023-01-28 07:53:33,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-01-28 07:53:33,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-01-28 07:53:33,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:33,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-01-28 07:53:33,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 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) [2023-01-28 07:53:33,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 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) [2023-01-28 07:53:33,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 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) [2023-01-28 07:53:33,912 INFO L175 Difference]: Start difference. First operand has 74 places, 100 transitions, 218 flow. Second operand 3 states and 620 transitions. [2023-01-28 07:53:33,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 356 flow [2023-01-28 07:53:33,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 356 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:53:33,915 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 144 flow [2023-01-28 07:53:33,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2023-01-28 07:53:33,916 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2023-01-28 07:53:33,916 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 144 flow [2023-01-28 07:53:33,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 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) [2023-01-28 07:53:33,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:33,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:53:33,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 07:53:33,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:33,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:33,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1821804029, now seen corresponding path program 1 times [2023-01-28 07:53:33,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:33,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826885585] [2023-01-28 07:53:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:33,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:33,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:33,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826885585] [2023-01-28 07:53:33,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826885585] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:53:33,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579961132] [2023-01-28 07:53:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:33,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:53:33,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:53:33,958 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) [2023-01-28 07:53:33,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 07:53:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:34,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:53:34,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:53:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:34,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:53:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:34,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579961132] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:53:34,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:53:34,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:53:34,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746409159] [2023-01-28 07:53:34,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:53:34,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:53:34,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:34,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:53:34,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:53:34,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 349 [2023-01-28 07:53:34,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 144 flow. Second operand has 7 states, 7 states have (on average 170.57142857142858) internal successors, (1194), 7 states have internal predecessors, (1194), 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) [2023-01-28 07:53:34,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:34,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 349 [2023-01-28 07:53:34,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:34,312 INFO L130 PetriNetUnfolder]: 1768/3012 cut-off events. [2023-01-28 07:53:34,312 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-01-28 07:53:34,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6311 conditions, 3012 events. 1768/3012 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 17909 event pairs, 0 based on Foata normal form. 361/3259 useless extension candidates. Maximal degree in co-relation 437. Up to 2052 conditions per place. [2023-01-28 07:53:34,317 INFO L137 encePairwiseOnDemand]: 346/349 looper letters, 0 selfloop transitions, 0 changer transitions 115/115 dead transitions. [2023-01-28 07:53:34,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 115 transitions, 448 flow [2023-01-28 07:53:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 07:53:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 07:53:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 943 transitions. [2023-01-28 07:53:34,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404011461318051 [2023-01-28 07:53:34,319 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 943 transitions. [2023-01-28 07:53:34,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 943 transitions. [2023-01-28 07:53:34,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:34,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 943 transitions. [2023-01-28 07:53:34,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 188.6) internal successors, (943), 5 states have internal predecessors, (943), 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) [2023-01-28 07:53:34,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 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) [2023-01-28 07:53:34,324 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 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) [2023-01-28 07:53:34,324 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 144 flow. Second operand 5 states and 943 transitions. [2023-01-28 07:53:34,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 115 transitions, 448 flow [2023-01-28 07:53:34,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 115 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:53:34,327 INFO L231 Difference]: Finished difference. Result has 65 places, 0 transitions, 0 flow [2023-01-28 07:53:34,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=65, PETRI_TRANSITIONS=0} [2023-01-28 07:53:34,330 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -9 predicate places. [2023-01-28 07:53:34,331 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 0 transitions, 0 flow [2023-01-28 07:53:34,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 170.57142857142858) internal successors, (1194), 7 states have internal predecessors, (1194), 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) [2023-01-28 07:53:34,332 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:53:34,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 07:53:34,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:53:34,537 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:53:34,537 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:53:34,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 209 transitions, 436 flow [2023-01-28 07:53:34,556 INFO L130 PetriNetUnfolder]: 45/307 cut-off events. [2023-01-28 07:53:34,556 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:53:34,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 307 events. 45/307 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1043 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-01-28 07:53:34,558 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 209 transitions, 436 flow [2023-01-28 07:53:34,559 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 209 transitions, 436 flow [2023-01-28 07:53:34,559 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:34,560 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 209 transitions, 436 flow [2023-01-28 07:53:34,560 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 209 transitions, 436 flow [2023-01-28 07:53:34,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 209 transitions, 436 flow [2023-01-28 07:53:34,576 INFO L130 PetriNetUnfolder]: 45/307 cut-off events. [2023-01-28 07:53:34,577 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:53:34,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 307 events. 45/307 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1043 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-01-28 07:53:34,585 INFO L119 LiptonReduction]: Number of co-enabled transitions 19716 [2023-01-28 07:53:37,197 INFO L134 LiptonReduction]: Checked pairs total: 54066 [2023-01-28 07:53:37,197 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-01-28 07:53:37,199 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:53:37,202 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;@709122b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:37,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:37,207 INFO L130 PetriNetUnfolder]: 12/69 cut-off events. [2023-01-28 07:53:37,207 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 07:53:37,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:37,207 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 07:53:37,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:53:37,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:37,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1364117961, now seen corresponding path program 1 times [2023-01-28 07:53:37,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:37,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317797653] [2023-01-28 07:53:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:37,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:53:37,226 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:53:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:53:37,244 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:53:37,245 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:53:37,245 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:53:37,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 07:53:37,245 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:53:37,246 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:53:37,246 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:53:37,246 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 07:53:37,274 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 07:53:37,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 273 transitions, 576 flow [2023-01-28 07:53:37,324 INFO L130 PetriNetUnfolder]: 71/463 cut-off events. [2023-01-28 07:53:37,325 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:53:37,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 463 events. 71/463 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1761 event pairs, 1 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-01-28 07:53:37,331 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 273 transitions, 576 flow [2023-01-28 07:53:37,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 273 transitions, 576 flow [2023-01-28 07:53:37,335 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:37,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 273 transitions, 576 flow [2023-01-28 07:53:37,336 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 273 transitions, 576 flow [2023-01-28 07:53:37,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 273 transitions, 576 flow [2023-01-28 07:53:37,384 INFO L130 PetriNetUnfolder]: 71/463 cut-off events. [2023-01-28 07:53:37,384 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:53:37,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 463 events. 71/463 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1761 event pairs, 1 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-01-28 07:53:37,401 INFO L119 LiptonReduction]: Number of co-enabled transitions 41664 [2023-01-28 07:53:40,102 INFO L134 LiptonReduction]: Checked pairs total: 122725 [2023-01-28 07:53:40,102 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-01-28 07:53:40,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:53:40,104 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;@709122b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:40,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:40,106 INFO L130 PetriNetUnfolder]: 2/25 cut-off events. [2023-01-28 07:53:40,106 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:53:40,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:40,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:53:40,106 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:40,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:40,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1386682415, now seen corresponding path program 1 times [2023-01-28 07:53:40,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:40,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191968577] [2023-01-28 07:53:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:40,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:40,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:40,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191968577] [2023-01-28 07:53:40,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191968577] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:53:40,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:53:40,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:53:40,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921957952] [2023-01-28 07:53:40,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:53:40,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:53:40,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:40,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:53:40,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:53:40,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 450 [2023-01-28 07:53:40,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 137 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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) [2023-01-28 07:53:40,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:40,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 450 [2023-01-28 07:53:40,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:56,375 INFO L130 PetriNetUnfolder]: 199858/297590 cut-off events. [2023-01-28 07:53:56,375 INFO L131 PetriNetUnfolder]: For 3619/3619 co-relation queries the response was YES. [2023-01-28 07:53:56,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570590 conditions, 297590 events. 199858/297590 cut-off events. For 3619/3619 co-relation queries the response was YES. Maximal size of possible extension queue 7618. Compared 2640012 event pairs, 121992 based on Foata normal form. 36172/301896 useless extension candidates. Maximal degree in co-relation 26003. Up to 270400 conditions per place. [2023-01-28 07:53:57,461 INFO L137 encePairwiseOnDemand]: 409/450 looper letters, 80 selfloop transitions, 2 changer transitions 11/119 dead transitions. [2023-01-28 07:53:57,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 119 transitions, 450 flow [2023-01-28 07:53:57,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:53:57,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:53:57,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2023-01-28 07:53:57,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5896296296296296 [2023-01-28 07:53:57,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2023-01-28 07:53:57,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2023-01-28 07:53:57,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:57,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2023-01-28 07:53:57,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 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) [2023-01-28 07:53:57,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 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) [2023-01-28 07:53:57,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 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) [2023-01-28 07:53:57,468 INFO L175 Difference]: Start difference. First operand has 100 places, 137 transitions, 304 flow. Second operand 3 states and 796 transitions. [2023-01-28 07:53:57,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 119 transitions, 450 flow [2023-01-28 07:53:57,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 119 transitions, 450 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:53:57,472 INFO L231 Difference]: Finished difference. Result has 103 places, 89 transitions, 203 flow [2023-01-28 07:53:57,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=103, PETRI_TRANSITIONS=89} [2023-01-28 07:53:57,473 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, 3 predicate places. [2023-01-28 07:53:57,473 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 89 transitions, 203 flow [2023-01-28 07:53:57,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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) [2023-01-28 07:53:57,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:57,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:53:57,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 07:53:57,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:57,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:57,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1035794882, now seen corresponding path program 1 times [2023-01-28 07:53:57,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:57,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170160944] [2023-01-28 07:53:57,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:57,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:57,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:57,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170160944] [2023-01-28 07:53:57,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170160944] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:53:57,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965249127] [2023-01-28 07:53:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:57,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:53:57,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:53:57,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:53:57,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 07:53:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:57,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:53:57,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:53:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:57,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:53:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:57,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965249127] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:53:57,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:53:57,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:53:57,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729758343] [2023-01-28 07:53:57,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:53:57,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:53:57,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:57,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:53:57,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:53:57,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 450 [2023-01-28 07:53:57,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 89 transitions, 203 flow. Second operand has 7 states, 7 states have (on average 220.57142857142858) internal successors, (1544), 7 states have internal predecessors, (1544), 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) [2023-01-28 07:53:57,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:57,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 450 [2023-01-28 07:53:57,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:54:00,774 INFO L130 PetriNetUnfolder]: 41059/59519 cut-off events. [2023-01-28 07:54:00,774 INFO L131 PetriNetUnfolder]: For 6462/6462 co-relation queries the response was YES. [2023-01-28 07:54:00,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122766 conditions, 59519 events. 41059/59519 cut-off events. For 6462/6462 co-relation queries the response was YES. Maximal size of possible extension queue 1766. Compared 436637 event pairs, 1530 based on Foata normal form. 5220/61942 useless extension candidates. Maximal degree in co-relation 8551. Up to 39168 conditions per place. [2023-01-28 07:54:00,913 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 0 selfloop transitions, 0 changer transitions 191/191 dead transitions. [2023-01-28 07:54:00,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 191 transitions, 739 flow [2023-01-28 07:54:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:54:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:54:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1477 transitions. [2023-01-28 07:54:00,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547037037037037 [2023-01-28 07:54:00,919 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1477 transitions. [2023-01-28 07:54:00,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1477 transitions. [2023-01-28 07:54:00,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:54:00,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1477 transitions. [2023-01-28 07:54:00,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 246.16666666666666) internal successors, (1477), 6 states have internal predecessors, (1477), 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) [2023-01-28 07:54:00,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 450.0) internal successors, (3150), 7 states have internal predecessors, (3150), 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) [2023-01-28 07:54:00,926 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 450.0) internal successors, (3150), 7 states have internal predecessors, (3150), 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) [2023-01-28 07:54:00,927 INFO L175 Difference]: Start difference. First operand has 103 places, 89 transitions, 203 flow. Second operand 6 states and 1477 transitions. [2023-01-28 07:54:00,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 191 transitions, 739 flow [2023-01-28 07:54:00,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 191 transitions, 735 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 07:54:00,929 INFO L231 Difference]: Finished difference. Result has 93 places, 0 transitions, 0 flow [2023-01-28 07:54:00,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=93, PETRI_TRANSITIONS=0} [2023-01-28 07:54:00,931 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -7 predicate places. [2023-01-28 07:54:00,931 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 0 transitions, 0 flow [2023-01-28 07:54:00,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 220.57142857142858) internal successors, (1544), 7 states have internal predecessors, (1544), 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) [2023-01-28 07:54:00,932 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:54:00,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 07:54:01,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:54:01,139 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:54:01,139 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:54:01,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 273 transitions, 576 flow [2023-01-28 07:54:01,183 INFO L130 PetriNetUnfolder]: 71/463 cut-off events. [2023-01-28 07:54:01,183 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:54:01,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 463 events. 71/463 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1761 event pairs, 1 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-01-28 07:54:01,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 273 transitions, 576 flow [2023-01-28 07:54:01,191 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 273 transitions, 576 flow [2023-01-28 07:54:01,191 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:54:01,191 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 273 transitions, 576 flow [2023-01-28 07:54:01,191 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 273 transitions, 576 flow [2023-01-28 07:54:01,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 273 transitions, 576 flow [2023-01-28 07:54:01,232 INFO L130 PetriNetUnfolder]: 71/463 cut-off events. [2023-01-28 07:54:01,232 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:54:01,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 463 events. 71/463 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1761 event pairs, 1 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-01-28 07:54:01,248 INFO L119 LiptonReduction]: Number of co-enabled transitions 41664 [2023-01-28 07:54:03,986 INFO L134 LiptonReduction]: Checked pairs total: 122439 [2023-01-28 07:54:03,986 INFO L136 LiptonReduction]: Total number of compositions: 176 [2023-01-28 07:54:03,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:54:03,988 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;@709122b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:54:03,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:54:03,993 INFO L130 PetriNetUnfolder]: 26/120 cut-off events. [2023-01-28 07:54:03,993 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-01-28 07:54:03,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:54:03,993 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 07:54:03,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:54:03,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:54:03,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1219979132, now seen corresponding path program 1 times [2023-01-28 07:54:03,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:54:03,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788780920] [2023-01-28 07:54:03,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:03,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:54:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:54:04,015 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:54:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:54:04,024 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:54:04,024 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:54:04,024 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:54:04,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 07:54:04,025 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:54:04,025 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:54:04,025 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:54:04,025 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 07:54:04,040 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 07:54:04,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 337 transitions, 718 flow [2023-01-28 07:54:04,115 INFO L130 PetriNetUnfolder]: 109/683 cut-off events. [2023-01-28 07:54:04,115 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:54:04,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 683 events. 109/683 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2924 event pairs, 6 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 483. Up to 32 conditions per place. [2023-01-28 07:54:04,125 INFO L82 GeneralOperation]: Start removeDead. Operand has 285 places, 337 transitions, 718 flow [2023-01-28 07:54:04,130 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 285 places, 337 transitions, 718 flow [2023-01-28 07:54:04,130 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:54:04,130 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 285 places, 337 transitions, 718 flow [2023-01-28 07:54:04,131 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 285 places, 337 transitions, 718 flow [2023-01-28 07:54:04,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 337 transitions, 718 flow [2023-01-28 07:54:04,195 INFO L130 PetriNetUnfolder]: 109/683 cut-off events. [2023-01-28 07:54:04,196 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:54:04,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 683 events. 109/683 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2924 event pairs, 6 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 483. Up to 32 conditions per place. [2023-01-28 07:54:04,225 INFO L119 LiptonReduction]: Number of co-enabled transitions 71672 [2023-01-28 07:54:07,021 INFO L134 LiptonReduction]: Checked pairs total: 215376 [2023-01-28 07:54:07,021 INFO L136 LiptonReduction]: Total number of compositions: 211 [2023-01-28 07:54:07,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:54:07,023 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;@709122b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:54:07,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:54:07,025 INFO L130 PetriNetUnfolder]: 4/30 cut-off events. [2023-01-28 07:54:07,025 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:54:07,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:54:07,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:54:07,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:54:07,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:54:07,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2097699956, now seen corresponding path program 1 times [2023-01-28 07:54:07,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:54:07,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138609894] [2023-01-28 07:54:07,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:07,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:54:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:54:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:54:07,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:54:07,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138609894] [2023-01-28 07:54:07,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138609894] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:54:07,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:54:07,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:54:07,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737441427] [2023-01-28 07:54:07,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:54:07,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:54:07,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:54:07,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:54:07,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:54:07,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 548 [2023-01-28 07:54:07,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 178 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 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) [2023-01-28 07:54:07,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:54:07,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 548 [2023-01-28 07:54:07,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand