/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_36-indirect_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 07:54:40,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 07:54:40,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 07:54:40,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 07:54:40,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 07:54:40,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 07:54:40,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 07:54:40,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 07:54:40,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 07:54:40,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 07:54:40,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 07:54:40,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 07:54:40,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 07:54:40,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 07:54:40,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 07:54:40,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 07:54:40,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 07:54:40,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 07:54:40,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 07:54:40,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 07:54:40,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 07:54:40,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 07:54:40,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 07:54:40,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 07:54:40,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 07:54:40,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 07:54:40,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 07:54:40,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 07:54:40,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 07:54:40,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 07:54:40,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 07:54:40,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 07:54:40,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 07:54:40,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 07:54:40,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 07:54:40,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 07:54:40,712 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 07:54:40,737 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 07:54:40,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 07:54:40,738 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 07:54:40,738 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 07:54:40,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 07:54:40,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 07:54:40,739 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 07:54:40,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 07:54:40,739 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 07:54:40,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 07:54:40,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 07:54:40,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 07:54:40,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 07:54:40,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 07:54:40,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 07:54:40,741 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 07:54:40,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 07:54:40,741 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 07:54:40,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 07:54:40,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 07:54:40,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 07:54:40,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 07:54:40,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 07:54:40,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:54:40,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 07:54:40,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 07:54:40,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 07:54:40,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 07:54:40,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 07:54:40,743 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 07:54:40,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 07:54:40,743 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 07:54:40,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 07:54:40,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 07:54:40,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 07:54:40,952 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 07:54:40,952 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 07:54:40,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i [2023-01-28 07:54:42,074 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 07:54:42,305 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 07:54:42,305 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i [2023-01-28 07:54:42,322 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e518443f0/dd589d8879bb4aff8d1103db58e65757/FLAG8382b2afa [2023-01-28 07:54:42,338 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e518443f0/dd589d8879bb4aff8d1103db58e65757 [2023-01-28 07:54:42,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 07:54:42,341 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 07:54:42,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 07:54:42,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 07:54:42,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 07:54:42,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:54:42" (1/1) ... [2023-01-28 07:54:42,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14db6c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:42, skipping insertion in model container [2023-01-28 07:54:42,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:54:42" (1/1) ... [2023-01-28 07:54:42,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 07:54:42,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 07:54:42,694 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_36-indirect_racefree.i[30176,30189] [2023-01-28 07:54:42,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:54:42,730 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 07:54:42,770 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_36-indirect_racefree.i[30176,30189] [2023-01-28 07:54:42,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:54:42,818 INFO L208 MainTranslator]: Completed translation [2023-01-28 07:54:42,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:42 WrapperNode [2023-01-28 07:54:42,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 07:54:42,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 07:54:42,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 07:54:42,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 07:54:42,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:42" (1/1) ... [2023-01-28 07:54:42,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:42" (1/1) ... [2023-01-28 07:54:42,874 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2023-01-28 07:54:42,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 07:54:42,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 07:54:42,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 07:54:42,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 07:54:42,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:42" (1/1) ... [2023-01-28 07:54:42,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:42" (1/1) ... [2023-01-28 07:54:42,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:42" (1/1) ... [2023-01-28 07:54:42,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:42" (1/1) ... [2023-01-28 07:54:42,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:42" (1/1) ... [2023-01-28 07:54:42,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:42" (1/1) ... [2023-01-28 07:54:42,895 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:42" (1/1) ... [2023-01-28 07:54:42,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:42" (1/1) ... [2023-01-28 07:54:42,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 07:54:42,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 07:54:42,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 07:54:42,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 07:54:42,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:42" (1/1) ... [2023-01-28 07:54:42,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:54:42,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:54:42,926 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 07:54:42,938 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 07:54:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 07:54:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 07:54:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 07:54:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 07:54:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 07:54:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 07:54:42,966 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 07:54:42,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 07:54:42,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 07:54:42,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 07:54:42,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 07:54:42,967 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 07:54:43,080 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 07:54:43,082 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 07:54:43,259 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 07:54:43,266 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 07:54:43,266 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-01-28 07:54:43,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:54:43 BoogieIcfgContainer [2023-01-28 07:54:43,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 07:54:43,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 07:54:43,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 07:54:43,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 07:54:43,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 07:54:42" (1/3) ... [2023-01-28 07:54:43,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7b8ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:54:43, skipping insertion in model container [2023-01-28 07:54:43,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:42" (2/3) ... [2023-01-28 07:54:43,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7b8ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:54:43, skipping insertion in model container [2023-01-28 07:54:43,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:54:43" (3/3) ... [2023-01-28 07:54:43,275 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2023-01-28 07:54:43,291 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 07:54:43,291 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 07:54:43,291 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 07:54:43,376 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 07:54:43,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 230 flow [2023-01-28 07:54:43,492 INFO L130 PetriNetUnfolder]: 17/146 cut-off events. [2023-01-28 07:54:43,492 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:54:43,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 146 events. 17/146 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 345 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2023-01-28 07:54:43,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 111 transitions, 230 flow [2023-01-28 07:54:43,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 106 transitions, 217 flow [2023-01-28 07:54:43,505 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:54:43,513 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 106 transitions, 217 flow [2023-01-28 07:54:43,515 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 106 transitions, 217 flow [2023-01-28 07:54:43,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 106 transitions, 217 flow [2023-01-28 07:54:43,544 INFO L130 PetriNetUnfolder]: 16/141 cut-off events. [2023-01-28 07:54:43,544 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:54:43,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 141 events. 16/141 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 334 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2023-01-28 07:54:43,547 INFO L119 LiptonReduction]: Number of co-enabled transitions 2624 [2023-01-28 07:54:46,459 INFO L134 LiptonReduction]: Checked pairs total: 5236 [2023-01-28 07:54:46,459 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-01-28 07:54:46,473 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:54:46,478 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;@520ecedc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:54:46,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:54:46,483 INFO L130 PetriNetUnfolder]: 0/10 cut-off events. [2023-01-28 07:54:46,483 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:54:46,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:54:46,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:54:46,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:54:46,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:54:46,489 INFO L85 PathProgramCache]: Analyzing trace with hash 13124765, now seen corresponding path program 1 times [2023-01-28 07:54:46,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:54:46,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121052292] [2023-01-28 07:54:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:46,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:54:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:54:46,712 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 07:54:46,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:54:46,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121052292] [2023-01-28 07:54:46,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121052292] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:54:46,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:54:46,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:54:46,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111042619] [2023-01-28 07:54:46,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:54:46,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:54:46,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:54:46,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:54:46,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:54:46,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 200 [2023-01-28 07:54:46,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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 07:54:46,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:54:46,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 200 [2023-01-28 07:54:46,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:54:46,836 INFO L130 PetriNetUnfolder]: 80/204 cut-off events. [2023-01-28 07:54:46,837 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:54:46,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 204 events. 80/204 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 872 event pairs, 0 based on Foata normal form. 9/191 useless extension candidates. Maximal degree in co-relation 368. Up to 169 conditions per place. [2023-01-28 07:54:46,842 INFO L137 encePairwiseOnDemand]: 188/200 looper letters, 25 selfloop transitions, 2 changer transitions 6/34 dead transitions. [2023-01-28 07:54:46,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 135 flow [2023-01-28 07:54:46,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:54:46,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:54:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2023-01-28 07:54:46,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283333333333333 [2023-01-28 07:54:46,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2023-01-28 07:54:46,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2023-01-28 07:54:46,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:54:46,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2023-01-28 07:54:46,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 07:54:46,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 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 07:54:46,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 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 07:54:46,867 INFO L175 Difference]: Start difference. First operand has 27 places, 32 transitions, 69 flow. Second operand 3 states and 317 transitions. [2023-01-28 07:54:46,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 135 flow [2023-01-28 07:54:46,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:54:46,870 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 47 flow [2023-01-28 07:54:46,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-01-28 07:54:46,875 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-01-28 07:54:46,875 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 47 flow [2023-01-28 07:54:46,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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 07:54:46,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:54:46,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:54:46,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 07:54:46,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:54:46,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:54:46,877 INFO L85 PathProgramCache]: Analyzing trace with hash 12069750, now seen corresponding path program 1 times [2023-01-28 07:54:46,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:54:46,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713995355] [2023-01-28 07:54:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:46,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:54:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:54:46,957 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 07:54:46,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:54:46,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713995355] [2023-01-28 07:54:46,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713995355] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:54:46,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146506400] [2023-01-28 07:54:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:46,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:54:46,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:54:46,961 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 07:54:46,970 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 07:54:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:54:47,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:54:47,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:54:47,108 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 07:54:47,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:54:47,152 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 07:54:47,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146506400] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:54:47,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:54:47,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:54:47,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953614115] [2023-01-28 07:54:47,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:54:47,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:54:47,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:54:47,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:54:47,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:54:47,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 200 [2023-01-28 07:54:47,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 47 flow. Second operand has 7 states, 7 states have (on average 92.28571428571429) internal successors, (646), 7 states have internal predecessors, (646), 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 07:54:47,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:54:47,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 200 [2023-01-28 07:54:47,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:54:47,200 INFO L130 PetriNetUnfolder]: 20/56 cut-off events. [2023-01-28 07:54:47,200 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:54:47,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 56 events. 20/56 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 81 event pairs, 9 based on Foata normal form. 11/67 useless extension candidates. Maximal degree in co-relation 127. Up to 42 conditions per place. [2023-01-28 07:54:47,200 INFO L137 encePairwiseOnDemand]: 197/200 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-01-28 07:54:47,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 26 transitions, 111 flow [2023-01-28 07:54:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:54:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:54:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 386 transitions. [2023-01-28 07:54:47,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825 [2023-01-28 07:54:47,204 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 386 transitions. [2023-01-28 07:54:47,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 386 transitions. [2023-01-28 07:54:47,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:54:47,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 386 transitions. [2023-01-28 07:54:47,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 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 07:54:47,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 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 07:54:47,208 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 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 07:54:47,208 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 47 flow. Second operand 4 states and 386 transitions. [2023-01-28 07:54:47,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 26 transitions, 111 flow [2023-01-28 07:54:47,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 07:54:47,209 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-01-28 07:54:47,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-01-28 07:54:47,210 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-01-28 07:54:47,210 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-01-28 07:54:47,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 92.28571428571429) internal successors, (646), 7 states have internal predecessors, (646), 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 07:54:47,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:54:47,225 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 07:54:47,425 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 07:54:47,425 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:54:47,427 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:54:47,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 230 flow [2023-01-28 07:54:47,443 INFO L130 PetriNetUnfolder]: 17/146 cut-off events. [2023-01-28 07:54:47,443 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:54:47,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 146 events. 17/146 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 345 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2023-01-28 07:54:47,444 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 111 transitions, 230 flow [2023-01-28 07:54:47,445 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 106 transitions, 217 flow [2023-01-28 07:54:47,445 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:54:47,445 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 106 transitions, 217 flow [2023-01-28 07:54:47,446 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 106 transitions, 217 flow [2023-01-28 07:54:47,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 106 transitions, 217 flow [2023-01-28 07:54:47,456 INFO L130 PetriNetUnfolder]: 16/141 cut-off events. [2023-01-28 07:54:47,457 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:54:47,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 141 events. 16/141 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 334 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2023-01-28 07:54:47,459 INFO L119 LiptonReduction]: Number of co-enabled transitions 2624 [2023-01-28 07:54:50,074 INFO L134 LiptonReduction]: Checked pairs total: 5236 [2023-01-28 07:54:50,075 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-01-28 07:54:50,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:54:50,078 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;@520ecedc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:54:50,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:54:50,080 INFO L130 PetriNetUnfolder]: 2/19 cut-off events. [2023-01-28 07:54:50,080 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:54:50,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:54:50,080 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 07:54:50,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:54:50,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:54:50,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1943242832, now seen corresponding path program 1 times [2023-01-28 07:54:50,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:54:50,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085019794] [2023-01-28 07:54:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:50,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:54:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:54:50,105 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:54:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:54:50,149 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:54:50,149 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:54:50,149 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:54:50,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 07:54:50,150 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:54:50,150 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:54:50,151 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:54:50,151 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 07:54:50,170 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 07:54:50,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 145 transitions, 308 flow [2023-01-28 07:54:50,190 INFO L130 PetriNetUnfolder]: 31/239 cut-off events. [2023-01-28 07:54:50,191 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:54:50,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 239 events. 31/239 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 711 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 148. Up to 8 conditions per place. [2023-01-28 07:54:50,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 145 transitions, 308 flow [2023-01-28 07:54:50,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 145 transitions, 308 flow [2023-01-28 07:54:50,194 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:54:50,194 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 145 transitions, 308 flow [2023-01-28 07:54:50,194 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 145 transitions, 308 flow [2023-01-28 07:54:50,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 145 transitions, 308 flow [2023-01-28 07:54:50,211 INFO L130 PetriNetUnfolder]: 31/239 cut-off events. [2023-01-28 07:54:50,212 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:54:50,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 239 events. 31/239 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 711 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 148. Up to 8 conditions per place. [2023-01-28 07:54:50,217 INFO L119 LiptonReduction]: Number of co-enabled transitions 8000 [2023-01-28 07:54:52,640 INFO L134 LiptonReduction]: Checked pairs total: 15997 [2023-01-28 07:54:52,640 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-01-28 07:54:52,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:54:52,644 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;@520ecedc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:54:52,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:54:52,646 INFO L130 PetriNetUnfolder]: 0/9 cut-off events. [2023-01-28 07:54:52,646 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:54:52,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:54:52,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:54:52,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:54:52,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:54:52,647 INFO L85 PathProgramCache]: Analyzing trace with hash 24729059, now seen corresponding path program 1 times [2023-01-28 07:54:52,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:54:52,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548491331] [2023-01-28 07:54:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:52,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:54:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:54:52,703 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 07:54:52,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:54:52,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548491331] [2023-01-28 07:54:52,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548491331] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:54:52,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:54:52,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:54:52,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779063852] [2023-01-28 07:54:52,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:54:52,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:54:52,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:54:52,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:54:52,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:54:52,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 254 [2023-01-28 07:54:52,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 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 07:54:52,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:54:52,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 254 [2023-01-28 07:54:52,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:54:52,985 INFO L130 PetriNetUnfolder]: 1642/2913 cut-off events. [2023-01-28 07:54:52,985 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:54:52,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 2913 events. 1642/2913 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 17159 event pairs, 752 based on Foata normal form. 428/3025 useless extension candidates. Maximal degree in co-relation 585. Up to 2673 conditions per place. [2023-01-28 07:54:52,995 INFO L137 encePairwiseOnDemand]: 237/254 looper letters, 32 selfloop transitions, 2 changer transitions 10/51 dead transitions. [2023-01-28 07:54:52,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2023-01-28 07:54:52,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:54:52,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:54:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-01-28 07:54:52,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393700787401575 [2023-01-28 07:54:52,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-01-28 07:54:52,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-01-28 07:54:52,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:54:52,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-01-28 07:54:52,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 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 07:54:53,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 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 07:54:53,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 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 07:54:53,001 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 411 transitions. [2023-01-28 07:54:53,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2023-01-28 07:54:53,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:54:53,003 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 82 flow [2023-01-28 07:54:53,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2023-01-28 07:54:53,004 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-01-28 07:54:53,004 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 82 flow [2023-01-28 07:54:53,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 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 07:54:53,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:54:53,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:54:53,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 07:54:53,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:54:53,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:54:53,005 INFO L85 PathProgramCache]: Analyzing trace with hash 603105024, now seen corresponding path program 1 times [2023-01-28 07:54:53,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:54:53,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578218141] [2023-01-28 07:54:53,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:53,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:54:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:54:53,046 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 07:54:53,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:54:53,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578218141] [2023-01-28 07:54:53,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578218141] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:54:53,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078112607] [2023-01-28 07:54:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:53,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:54:53,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:54:53,049 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 07:54:53,075 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 07:54:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:54:53,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:54:53,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:54:53,138 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 07:54:53,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:54:53,157 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 07:54:53,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078112607] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:54:53,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:54:53,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:54:53,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168096995] [2023-01-28 07:54:53,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:54:53,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:54:53,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:54:53,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:54:53,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:54:53,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 254 [2023-01-28 07:54:53,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 118.28571428571429) internal successors, (828), 7 states have internal predecessors, (828), 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 07:54:53,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:54:53,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 254 [2023-01-28 07:54:53,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:54:53,263 INFO L130 PetriNetUnfolder]: 376/688 cut-off events. [2023-01-28 07:54:53,264 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-01-28 07:54:53,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1471 conditions, 688 events. 376/688 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3181 event pairs, 0 based on Foata normal form. 90/778 useless extension candidates. Maximal degree in co-relation 163. Up to 450 conditions per place. [2023-01-28 07:54:53,266 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-01-28 07:54:53,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 222 flow [2023-01-28 07:54:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 07:54:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 07:54:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 630 transitions. [2023-01-28 07:54:53,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49606299212598426 [2023-01-28 07:54:53,268 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 630 transitions. [2023-01-28 07:54:53,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 630 transitions. [2023-01-28 07:54:53,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:54:53,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 630 transitions. [2023-01-28 07:54:53,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.0) internal successors, (630), 5 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:53,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 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 07:54:53,273 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 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 07:54:53,273 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 82 flow. Second operand 5 states and 630 transitions. [2023-01-28 07:54:53,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 222 flow [2023-01-28 07:54:53,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:54:53,276 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-01-28 07:54:53,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-01-28 07:54:53,279 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2023-01-28 07:54:53,280 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-01-28 07:54:53,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 118.28571428571429) internal successors, (828), 7 states have internal predecessors, (828), 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 07:54:53,281 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:54:53,291 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 07:54:53,486 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 07:54:53,487 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:54:53,488 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:54:53,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 145 transitions, 308 flow [2023-01-28 07:54:53,508 INFO L130 PetriNetUnfolder]: 31/239 cut-off events. [2023-01-28 07:54:53,508 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:54:53,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 239 events. 31/239 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 711 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 148. Up to 8 conditions per place. [2023-01-28 07:54:53,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 145 transitions, 308 flow [2023-01-28 07:54:53,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 145 transitions, 308 flow [2023-01-28 07:54:53,511 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:54:53,511 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 145 transitions, 308 flow [2023-01-28 07:54:53,511 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 145 transitions, 308 flow [2023-01-28 07:54:53,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 145 transitions, 308 flow [2023-01-28 07:54:53,528 INFO L130 PetriNetUnfolder]: 31/239 cut-off events. [2023-01-28 07:54:53,528 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:54:53,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 239 events. 31/239 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 711 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 148. Up to 8 conditions per place. [2023-01-28 07:54:53,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 8000 [2023-01-28 07:54:56,107 INFO L134 LiptonReduction]: Checked pairs total: 16298 [2023-01-28 07:54:56,107 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-01-28 07:54:56,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:54:56,109 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;@520ecedc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:54:56,109 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:54:56,113 INFO L130 PetriNetUnfolder]: 12/58 cut-off events. [2023-01-28 07:54:56,114 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 07:54:56,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:54:56,114 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 07:54:56,114 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:54:56,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:54:56,114 INFO L85 PathProgramCache]: Analyzing trace with hash 424442762, now seen corresponding path program 1 times [2023-01-28 07:54:56,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:54:56,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749467397] [2023-01-28 07:54:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:56,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:54:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:54:56,139 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:54:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:54:56,164 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:54:56,165 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:54:56,165 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:54:56,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 07:54:56,165 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:54:56,166 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:54:56,166 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:54:56,166 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 07:54:56,198 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 07:54:56,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 179 transitions, 388 flow [2023-01-28 07:54:56,230 INFO L130 PetriNetUnfolder]: 50/363 cut-off events. [2023-01-28 07:54:56,231 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:54:56,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 363 events. 50/363 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1208 event pairs, 1 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 247. Up to 16 conditions per place. [2023-01-28 07:54:56,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 179 transitions, 388 flow [2023-01-28 07:54:56,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 179 transitions, 388 flow [2023-01-28 07:54:56,236 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:54:56,236 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 179 transitions, 388 flow [2023-01-28 07:54:56,237 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 179 transitions, 388 flow [2023-01-28 07:54:56,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 179 transitions, 388 flow [2023-01-28 07:54:56,266 INFO L130 PetriNetUnfolder]: 50/363 cut-off events. [2023-01-28 07:54:56,266 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:54:56,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 363 events. 50/363 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1208 event pairs, 1 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 247. Up to 16 conditions per place. [2023-01-28 07:54:56,279 INFO L119 LiptonReduction]: Number of co-enabled transitions 15360 [2023-01-28 07:54:58,901 INFO L134 LiptonReduction]: Checked pairs total: 34439 [2023-01-28 07:54:58,901 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-01-28 07:54:58,903 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:54:58,903 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;@520ecedc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:54:58,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:54:58,905 INFO L130 PetriNetUnfolder]: 0/9 cut-off events. [2023-01-28 07:54:58,905 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:54:58,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:54:58,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:54:58,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:54:58,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:54:58,905 INFO L85 PathProgramCache]: Analyzing trace with hash 38674866, now seen corresponding path program 1 times [2023-01-28 07:54:58,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:54:58,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942719649] [2023-01-28 07:54:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:58,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:54:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:54:58,959 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 07:54:58,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:54:58,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942719649] [2023-01-28 07:54:58,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942719649] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:54:58,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:54:58,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:54:58,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300837673] [2023-01-28 07:54:58,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:54:58,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:54:58,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:54:58,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:54:58,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:54:58,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 308 [2023-01-28 07:54:58,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 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 07:54:58,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:54:58,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 308 [2023-01-28 07:54:58,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:02,352 INFO L130 PetriNetUnfolder]: 32280/46590 cut-off events. [2023-01-28 07:55:02,352 INFO L131 PetriNetUnfolder]: For 1317/1317 co-relation queries the response was YES. [2023-01-28 07:55:02,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92819 conditions, 46590 events. 32280/46590 cut-off events. For 1317/1317 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 302760 event pairs, 21006 based on Foata normal form. 5103/47961 useless extension candidates. Maximal degree in co-relation 7949. Up to 45346 conditions per place. [2023-01-28 07:55:02,552 INFO L137 encePairwiseOnDemand]: 285/308 looper letters, 44 selfloop transitions, 2 changer transitions 11/64 dead transitions. [2023-01-28 07:55:02,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 268 flow [2023-01-28 07:55:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:55:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:55:02,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-01-28 07:55:02,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497835497835498 [2023-01-28 07:55:02,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-01-28 07:55:02,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-01-28 07:55:02,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:02,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-01-28 07:55:02,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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 07:55:02,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:02,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:02,559 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 508 transitions. [2023-01-28 07:55:02,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 268 flow [2023-01-28 07:55:02,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:55:02,567 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 113 flow [2023-01-28 07:55:02,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-01-28 07:55:02,568 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-01-28 07:55:02,568 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 113 flow [2023-01-28 07:55:02,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 07:55:02,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:02,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:55:02,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 07:55:02,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:02,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:02,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1141297874, now seen corresponding path program 1 times [2023-01-28 07:55:02,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:02,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133492978] [2023-01-28 07:55:02,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:02,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:02,624 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 07:55:02,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:02,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133492978] [2023-01-28 07:55:02,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133492978] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:55:02,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868139393] [2023-01-28 07:55:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:02,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:02,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:55:02,626 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 07:55:02,629 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 07:55:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:02,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:55:02,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:55:02,706 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 07:55:02,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:55:02,726 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 07:55:02,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868139393] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:55:02,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:55:02,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:55:02,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839740573] [2023-01-28 07:55:02,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:55:02,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:55:02,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:02,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:55:02,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:55:02,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 308 [2023-01-28 07:55:02,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 113 flow. Second operand has 7 states, 7 states have (on average 144.28571428571428) internal successors, (1010), 7 states have internal predecessors, (1010), 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 07:55:02,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:02,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 308 [2023-01-28 07:55:02,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:03,473 INFO L130 PetriNetUnfolder]: 7582/11197 cut-off events. [2023-01-28 07:55:03,473 INFO L131 PetriNetUnfolder]: For 1404/1404 co-relation queries the response was YES. [2023-01-28 07:55:03,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23615 conditions, 11197 events. 7582/11197 cut-off events. For 1404/1404 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 65213 event pairs, 0 based on Foata normal form. 1098/12295 useless extension candidates. Maximal degree in co-relation 2698. Up to 7322 conditions per place. [2023-01-28 07:55:03,496 INFO L137 encePairwiseOnDemand]: 305/308 looper letters, 0 selfloop transitions, 0 changer transitions 98/98 dead transitions. [2023-01-28 07:55:03,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 98 transitions, 403 flow [2023-01-28 07:55:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:55:03,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:55:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 946 transitions. [2023-01-28 07:55:03,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2023-01-28 07:55:03,499 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 946 transitions. [2023-01-28 07:55:03,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 946 transitions. [2023-01-28 07:55:03,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:03,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 946 transitions. [2023-01-28 07:55:03,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.66666666666666) internal successors, (946), 6 states have internal predecessors, (946), 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 07:55:03,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 308.0) internal successors, (2156), 7 states have internal predecessors, (2156), 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 07:55:03,504 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 308.0) internal successors, (2156), 7 states have internal predecessors, (2156), 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 07:55:03,505 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 113 flow. Second operand 6 states and 946 transitions. [2023-01-28 07:55:03,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 98 transitions, 403 flow [2023-01-28 07:55:03,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 98 transitions, 399 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 07:55:03,507 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-01-28 07:55:03,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-01-28 07:55:03,507 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-01-28 07:55:03,507 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-01-28 07:55:03,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.28571428571428) internal successors, (1010), 7 states have internal predecessors, (1010), 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 07:55:03,508 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:55:03,516 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 07:55:03,713 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 07:55:03,713 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:55:03,714 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:55:03,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 179 transitions, 388 flow [2023-01-28 07:55:03,746 INFO L130 PetriNetUnfolder]: 50/363 cut-off events. [2023-01-28 07:55:03,746 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:55:03,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 363 events. 50/363 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1208 event pairs, 1 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 247. Up to 16 conditions per place. [2023-01-28 07:55:03,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 179 transitions, 388 flow [2023-01-28 07:55:03,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 179 transitions, 388 flow [2023-01-28 07:55:03,751 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:03,751 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 179 transitions, 388 flow [2023-01-28 07:55:03,751 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 179 transitions, 388 flow [2023-01-28 07:55:03,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 179 transitions, 388 flow [2023-01-28 07:55:03,778 INFO L130 PetriNetUnfolder]: 50/363 cut-off events. [2023-01-28 07:55:03,778 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:55:03,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 363 events. 50/363 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1208 event pairs, 1 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 247. Up to 16 conditions per place. [2023-01-28 07:55:03,788 INFO L119 LiptonReduction]: Number of co-enabled transitions 15360 [2023-01-28 07:55:06,390 INFO L134 LiptonReduction]: Checked pairs total: 33902 [2023-01-28 07:55:06,390 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-01-28 07:55:06,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:55:06,393 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;@520ecedc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:06,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:06,399 INFO L130 PetriNetUnfolder]: 21/94 cut-off events. [2023-01-28 07:55:06,399 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 07:55:06,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:06,399 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 07:55:06,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:55:06,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:06,400 INFO L85 PathProgramCache]: Analyzing trace with hash 85919990, now seen corresponding path program 1 times [2023-01-28 07:55:06,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:06,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239445506] [2023-01-28 07:55:06,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:06,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:06,414 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:55:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:06,426 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:55:06,426 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:55:06,426 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:55:06,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 07:55:06,426 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:55:06,427 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:55:06,427 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:55:06,427 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 07:55:06,444 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 07:55:06,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 213 transitions, 470 flow [2023-01-28 07:55:06,501 INFO L130 PetriNetUnfolder]: 81/551 cut-off events. [2023-01-28 07:55:06,501 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:55:06,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 551 events. 81/551 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2139 event pairs, 6 based on Foata normal form. 0/465 useless extension candidates. Maximal degree in co-relation 383. Up to 32 conditions per place. [2023-01-28 07:55:06,507 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 213 transitions, 470 flow [2023-01-28 07:55:06,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 213 transitions, 470 flow [2023-01-28 07:55:06,510 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:06,510 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 213 transitions, 470 flow [2023-01-28 07:55:06,511 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 213 transitions, 470 flow [2023-01-28 07:55:06,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 213 transitions, 470 flow [2023-01-28 07:55:06,567 INFO L130 PetriNetUnfolder]: 81/551 cut-off events. [2023-01-28 07:55:06,568 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:55:06,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 551 events. 81/551 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2139 event pairs, 6 based on Foata normal form. 0/465 useless extension candidates. Maximal degree in co-relation 383. Up to 32 conditions per place. [2023-01-28 07:55:06,585 INFO L119 LiptonReduction]: Number of co-enabled transitions 24960 [2023-01-28 07:55:09,476 INFO L134 LiptonReduction]: Checked pairs total: 64732 [2023-01-28 07:55:09,476 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-01-28 07:55:09,478 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:55:09,478 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;@520ecedc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:09,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:09,480 INFO L130 PetriNetUnfolder]: 0/9 cut-off events. [2023-01-28 07:55:09,480 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:09,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:09,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:55:09,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:09,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:09,481 INFO L85 PathProgramCache]: Analyzing trace with hash 54867992, now seen corresponding path program 1 times [2023-01-28 07:55:09,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:09,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833681967] [2023-01-28 07:55:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:09,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:09,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:09,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833681967] [2023-01-28 07:55:09,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833681967] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:55:09,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:55:09,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:55:09,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122778812] [2023-01-28 07:55:09,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:55:09,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:55:09,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:09,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:55:09,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:55:09,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 363 [2023-01-28 07:55:09,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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 07:55:09,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:09,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 363 [2023-01-28 07:55:09,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:45,829 INFO L130 PetriNetUnfolder]: 411276/561314 cut-off events. [2023-01-28 07:55:45,830 INFO L131 PetriNetUnfolder]: For 20950/20950 co-relation queries the response was YES. [2023-01-28 07:55:46,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1108130 conditions, 561314 events. 411276/561314 cut-off events. For 20950/20950 co-relation queries the response was YES. Maximal size of possible extension queue 10645. Compared 4256228 event pairs, 302497 based on Foata normal form. 85320/609593 useless extension candidates. Maximal degree in co-relation 94407. Up to 535317 conditions per place. [2023-01-28 07:55:47,784 INFO L137 encePairwiseOnDemand]: 334/363 looper letters, 54 selfloop transitions, 2 changer transitions 12/78 dead transitions. [2023-01-28 07:55:47,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 332 flow [2023-01-28 07:55:47,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:55:47,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:55:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2023-01-28 07:55:47,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5537190082644629 [2023-01-28 07:55:47,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2023-01-28 07:55:47,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2023-01-28 07:55:47,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:47,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2023-01-28 07:55:47,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 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 07:55:47,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 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 07:55:47,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 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 07:55:47,789 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 603 transitions. [2023-01-28 07:55:47,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 332 flow [2023-01-28 07:55:47,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:55:47,795 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 146 flow [2023-01-28 07:55:47,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=56} [2023-01-28 07:55:47,795 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-01-28 07:55:47,795 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 146 flow [2023-01-28 07:55:47,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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 07:55:47,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:47,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:55:47,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 07:55:47,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:47,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:47,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1533718712, now seen corresponding path program 1 times [2023-01-28 07:55:47,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:47,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365637447] [2023-01-28 07:55:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:47,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:47,826 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 07:55:47,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:47,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365637447] [2023-01-28 07:55:47,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365637447] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:55:47,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020464274] [2023-01-28 07:55:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:47,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:47,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:55:47,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:55:47,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 07:55:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:47,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:55:47,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:55:47,915 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 07:55:47,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:55:47,932 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 07:55:47,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020464274] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:55:47,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:55:47,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:55:47,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178403264] [2023-01-28 07:55:47,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:55:47,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:55:47,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:47,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:55:47,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:55:47,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 363 [2023-01-28 07:55:47,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 146 flow. Second operand has 7 states, 7 states have (on average 170.28571428571428) internal successors, (1192), 7 states have internal predecessors, (1192), 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 07:55:47,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:47,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 363 [2023-01-28 07:55:47,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:56:02,027 INFO L130 PetriNetUnfolder]: 191482/255653 cut-off events. [2023-01-28 07:56:02,027 INFO L131 PetriNetUnfolder]: For 16322/16322 co-relation queries the response was YES. [2023-01-28 07:56:02,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528298 conditions, 255653 events. 191482/255653 cut-off events. For 16322/16322 co-relation queries the response was YES. Maximal size of possible extension queue 5431. Compared 1768084 event pairs, 8016 based on Foata normal form. 1110/256762 useless extension candidates. Maximal degree in co-relation 474263. Up to 163477 conditions per place. [2023-01-28 07:56:03,254 INFO L137 encePairwiseOnDemand]: 359/363 looper letters, 136 selfloop transitions, 5 changer transitions 1/152 dead transitions. [2023-01-28 07:56:03,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 152 transitions, 626 flow [2023-01-28 07:56:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:56:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:56:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1153 transitions. [2023-01-28 07:56:03,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529384756657484 [2023-01-28 07:56:03,260 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1153 transitions. [2023-01-28 07:56:03,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1153 transitions. [2023-01-28 07:56:03,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:56:03,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1153 transitions. [2023-01-28 07:56:03,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.16666666666666) internal successors, (1153), 6 states have internal predecessors, (1153), 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 07:56:03,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 363.0) internal successors, (2541), 7 states have internal predecessors, (2541), 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 07:56:03,266 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 363.0) internal successors, (2541), 7 states have internal predecessors, (2541), 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 07:56:03,266 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 146 flow. Second operand 6 states and 1153 transitions. [2023-01-28 07:56:03,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 152 transitions, 626 flow [2023-01-28 07:56:03,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 152 transitions, 618 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-28 07:56:03,274 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 172 flow [2023-01-28 07:56:03,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2023-01-28 07:56:03,275 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-01-28 07:56:03,275 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 172 flow [2023-01-28 07:56:03,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 170.28571428571428) internal successors, (1192), 7 states have internal predecessors, (1192), 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 07:56:03,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:56:03,276 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:56:03,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-28 07:56:03,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:56:03,481 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:56:03,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:56:03,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1945792594, now seen corresponding path program 1 times [2023-01-28 07:56:03,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:56:03,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963314477] [2023-01-28 07:56:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:56:03,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:56:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:56:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:56:03,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:56:03,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963314477] [2023-01-28 07:56:03,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963314477] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:56:03,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647555793] [2023-01-28 07:56:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:56:03,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:56:03,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:56:03,572 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:56:03,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 07:56:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:56:03,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 07:56:03,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:56:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:56:03,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:56:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:56:03,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647555793] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:56:03,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:56:03,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 07:56:03,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774524527] [2023-01-28 07:56:03,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:56:03,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 07:56:03,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:56:03,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 07:56:03,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 07:56:03,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 363 [2023-01-28 07:56:03,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 170.6153846153846) internal successors, (2218), 13 states have internal predecessors, (2218), 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 07:56:03,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:56:03,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 363 [2023-01-28 07:56:03,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:56:09,245 INFO L130 PetriNetUnfolder]: 63646/89221 cut-off events. [2023-01-28 07:56:09,245 INFO L131 PetriNetUnfolder]: For 70140/70140 co-relation queries the response was YES. [2023-01-28 07:56:09,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208526 conditions, 89221 events. 63646/89221 cut-off events. For 70140/70140 co-relation queries the response was YES. Maximal size of possible extension queue 2076. Compared 602351 event pairs, 0 based on Foata normal form. 8910/98130 useless extension candidates. Maximal degree in co-relation 27219. Up to 40869 conditions per place. [2023-01-28 07:56:09,502 INFO L137 encePairwiseOnDemand]: 360/363 looper letters, 0 selfloop transitions, 0 changer transitions 148/148 dead transitions. [2023-01-28 07:56:09,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 148 transitions, 626 flow [2023-01-28 07:56:09,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 07:56:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 07:56:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1315 transitions. [2023-01-28 07:56:09,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175127902400629 [2023-01-28 07:56:09,506 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1315 transitions. [2023-01-28 07:56:09,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1315 transitions. [2023-01-28 07:56:09,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:56:09,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1315 transitions. [2023-01-28 07:56:09,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.85714285714286) internal successors, (1315), 7 states have internal predecessors, (1315), 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 07:56:09,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 363.0) internal successors, (2904), 8 states have internal predecessors, (2904), 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 07:56:09,513 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 363.0) internal successors, (2904), 8 states have internal predecessors, (2904), 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 07:56:09,513 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 172 flow. Second operand 7 states and 1315 transitions. [2023-01-28 07:56:09,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 148 transitions, 626 flow [2023-01-28 07:56:09,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 148 transitions, 607 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-01-28 07:56:09,746 INFO L231 Difference]: Finished difference. Result has 71 places, 0 transitions, 0 flow [2023-01-28 07:56:09,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=71, PETRI_TRANSITIONS=0} [2023-01-28 07:56:09,747 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-01-28 07:56:09,747 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 0 transitions, 0 flow [2023-01-28 07:56:09,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.6153846153846) internal successors, (2218), 13 states have internal predecessors, (2218), 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 07:56:09,748 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:56:09,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 07:56:09,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-28 07:56:09,949 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-28 07:56:09,950 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:56:09,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 213 transitions, 470 flow [2023-01-28 07:56:09,985 INFO L130 PetriNetUnfolder]: 81/551 cut-off events. [2023-01-28 07:56:09,985 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:56:09,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 551 events. 81/551 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2139 event pairs, 6 based on Foata normal form. 0/465 useless extension candidates. Maximal degree in co-relation 383. Up to 32 conditions per place. [2023-01-28 07:56:09,989 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 213 transitions, 470 flow [2023-01-28 07:56:09,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 213 transitions, 470 flow [2023-01-28 07:56:09,991 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:56:09,991 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 213 transitions, 470 flow [2023-01-28 07:56:09,991 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 213 transitions, 470 flow [2023-01-28 07:56:09,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 213 transitions, 470 flow [2023-01-28 07:56:10,024 INFO L130 PetriNetUnfolder]: 81/551 cut-off events. [2023-01-28 07:56:10,024 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:56:10,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 551 events. 81/551 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2139 event pairs, 6 based on Foata normal form. 0/465 useless extension candidates. Maximal degree in co-relation 383. Up to 32 conditions per place. [2023-01-28 07:56:10,038 INFO L119 LiptonReduction]: Number of co-enabled transitions 24960 [2023-01-28 07:56:12,633 INFO L134 LiptonReduction]: Checked pairs total: 58382 [2023-01-28 07:56:12,633 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-01-28 07:56:12,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:56:12,635 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;@520ecedc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:56:12,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:56:12,643 INFO L130 PetriNetUnfolder]: 31/133 cut-off events. [2023-01-28 07:56:12,643 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-01-28 07:56:12,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:56:12,643 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-28 07:56:12,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:56:12,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:56:12,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1110862061, now seen corresponding path program 1 times [2023-01-28 07:56:12,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:56:12,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322260809] [2023-01-28 07:56:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:56:12,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:56:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:56:12,665 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:56:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:56:12,689 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:56:12,689 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:56:12,690 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:56:12,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 07:56:12,690 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:56:12,691 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:56:12,691 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:56:12,691 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-28 07:56:12,720 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-28 07:56:12,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 247 transitions, 554 flow [2023-01-28 07:56:12,812 INFO L130 PetriNetUnfolder]: 140/871 cut-off events. [2023-01-28 07:56:12,812 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 07:56:12,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 871 events. 140/871 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3823 event pairs, 23 based on Foata normal form. 0/741 useless extension candidates. Maximal degree in co-relation 596. Up to 80 conditions per place. [2023-01-28 07:56:12,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 247 transitions, 554 flow [2023-01-28 07:56:12,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 247 transitions, 554 flow [2023-01-28 07:56:12,829 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:56:12,829 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 247 transitions, 554 flow [2023-01-28 07:56:12,829 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 247 transitions, 554 flow [2023-01-28 07:56:12,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 247 transitions, 554 flow [2023-01-28 07:56:12,910 INFO L130 PetriNetUnfolder]: 140/871 cut-off events. [2023-01-28 07:56:12,911 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 07:56:12,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 871 events. 140/871 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3823 event pairs, 23 based on Foata normal form. 0/741 useless extension candidates. Maximal degree in co-relation 596. Up to 80 conditions per place. [2023-01-28 07:56:13,083 INFO L119 LiptonReduction]: Number of co-enabled transitions 36800 [2023-01-28 07:56:15,695 INFO L134 LiptonReduction]: Checked pairs total: 91298 [2023-01-28 07:56:15,695 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-01-28 07:56:15,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:56:15,696 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;@520ecedc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:56:15,696 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:56:15,698 INFO L130 PetriNetUnfolder]: 0/9 cut-off events. [2023-01-28 07:56:15,698 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:56:15,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:56:15,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:56:15,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:56:15,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:56:15,698 INFO L85 PathProgramCache]: Analyzing trace with hash 73304792, now seen corresponding path program 1 times [2023-01-28 07:56:15,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:56:15,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016047557] [2023-01-28 07:56:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:56:15,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:56:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:56:15,731 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 07:56:15,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:56:15,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016047557] [2023-01-28 07:56:15,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016047557] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:56:15,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:56:15,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:56:15,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598620679] [2023-01-28 07:56:15,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:56:15,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:56:15,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:56:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:56:15,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:56:15,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 416 [2023-01-28 07:56:15,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 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 07:56:15,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:56:15,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 416 [2023-01-28 07:56:15,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand