/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/pthread-ext/29_conditionals_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 06:39:00,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 06:39:00,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 06:39:00,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 06:39:00,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 06:39:00,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 06:39:00,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 06:39:00,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 06:39:00,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 06:39:00,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 06:39:00,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 06:39:00,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 06:39:00,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 06:39:00,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 06:39:00,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 06:39:00,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 06:39:00,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 06:39:00,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 06:39:00,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 06:39:00,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 06:39:00,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 06:39:00,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 06:39:00,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 06:39:00,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 06:39:00,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 06:39:00,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 06:39:00,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 06:39:00,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 06:39:00,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 06:39:00,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 06:39:00,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 06:39:00,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 06:39:00,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 06:39:00,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 06:39:00,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 06:39:00,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 06:39:00,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 06:39:00,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 06:39:00,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 06:39:00,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 06:39:00,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 06:39:00,869 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 06:39:00,882 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 06:39:00,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 06:39:00,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 06:39:00,883 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 06:39:00,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 06:39:00,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 06:39:00,883 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 06:39:00,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 06:39:00,884 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 06:39:00,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 06:39:00,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 06:39:00,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 06:39:00,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 06:39:00,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 06:39:00,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 06:39:00,885 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 06:39:00,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 06:39:00,885 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 06:39:00,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 06:39:00,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 06:39:00,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 06:39:00,885 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 06:39:00,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 06:39:00,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:39:00,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 06:39:00,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 06:39:00,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 06:39:00,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 06:39:00,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 06:39:00,887 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 06:39:00,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 06:39:00,887 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 06:39:01,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 06:39:01,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 06:39:01,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 06:39:01,075 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 06:39:01,077 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 06:39:01,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i [2023-01-28 06:39:02,039 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 06:39:02,230 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 06:39:02,230 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i [2023-01-28 06:39:02,240 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3541e4136/c056c4de0fb34f528d5e8bbb1b0b20ce/FLAGee8ed1a81 [2023-01-28 06:39:02,251 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3541e4136/c056c4de0fb34f528d5e8bbb1b0b20ce [2023-01-28 06:39:02,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 06:39:02,256 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 06:39:02,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 06:39:02,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 06:39:02,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 06:39:02,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:39:02" (1/1) ... [2023-01-28 06:39:02,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dd14c14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:02, skipping insertion in model container [2023-01-28 06:39:02,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:39:02" (1/1) ... [2023-01-28 06:39:02,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 06:39:02,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 06:39:02,555 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i[30422,30435] [2023-01-28 06:39:02,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:39:02,570 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 06:39:02,604 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i[30422,30435] [2023-01-28 06:39:02,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:39:02,632 INFO L208 MainTranslator]: Completed translation [2023-01-28 06:39:02,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:02 WrapperNode [2023-01-28 06:39:02,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 06:39:02,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 06:39:02,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 06:39:02,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 06:39:02,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:02" (1/1) ... [2023-01-28 06:39:02,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:02" (1/1) ... [2023-01-28 06:39:02,678 INFO L138 Inliner]: procedures = 170, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 61 [2023-01-28 06:39:02,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 06:39:02,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 06:39:02,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 06:39:02,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 06:39:02,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:02" (1/1) ... [2023-01-28 06:39:02,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:02" (1/1) ... [2023-01-28 06:39:02,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:02" (1/1) ... [2023-01-28 06:39:02,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:02" (1/1) ... [2023-01-28 06:39:02,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:02" (1/1) ... [2023-01-28 06:39:02,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:02" (1/1) ... [2023-01-28 06:39:02,706 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:02" (1/1) ... [2023-01-28 06:39:02,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:02" (1/1) ... [2023-01-28 06:39:02,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 06:39:02,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 06:39:02,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 06:39:02,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 06:39:02,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:02" (1/1) ... [2023-01-28 06:39:02,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:39:02,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:39:02,735 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 06:39:02,741 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 06:39:02,759 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-28 06:39:02,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-28 06:39:02,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 06:39:02,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 06:39:02,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 06:39:02,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 06:39:02,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 06:39:02,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 06:39:02,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 06:39:02,760 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 06:39:02,839 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 06:39:02,841 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 06:39:02,941 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 06:39:02,963 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 06:39:02,963 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-01-28 06:39:02,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:39:02 BoogieIcfgContainer [2023-01-28 06:39:02,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 06:39:02,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 06:39:02,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 06:39:02,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 06:39:02,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 06:39:02" (1/3) ... [2023-01-28 06:39:02,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fef73eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:39:02, skipping insertion in model container [2023-01-28 06:39:02,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:02" (2/3) ... [2023-01-28 06:39:02,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fef73eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:39:02, skipping insertion in model container [2023-01-28 06:39:02,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:39:02" (3/3) ... [2023-01-28 06:39:02,977 INFO L112 eAbstractionObserver]: Analyzing ICFG 29_conditionals_vs.i [2023-01-28 06:39:02,988 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 06:39:02,988 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 06:39:02,989 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 06:39:03,027 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:39:03,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 113 flow [2023-01-28 06:39:03,076 INFO L130 PetriNetUnfolder]: 6/64 cut-off events. [2023-01-28 06:39:03,076 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:03,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-01-28 06:39:03,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 54 transitions, 113 flow [2023-01-28 06:39:03,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 54 transitions, 113 flow [2023-01-28 06:39:03,084 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:03,089 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 54 transitions, 113 flow [2023-01-28 06:39:03,090 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 54 transitions, 113 flow [2023-01-28 06:39:03,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 113 flow [2023-01-28 06:39:03,102 INFO L130 PetriNetUnfolder]: 6/64 cut-off events. [2023-01-28 06:39:03,102 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:03,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-01-28 06:39:03,103 INFO L119 LiptonReduction]: Number of co-enabled transitions 754 [2023-01-28 06:39:04,517 INFO L134 LiptonReduction]: Checked pairs total: 611 [2023-01-28 06:39:04,518 INFO L136 LiptonReduction]: Total number of compositions: 54 [2023-01-28 06:39:04,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:39:04,532 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:04,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 06:39:04,534 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-28 06:39:04,534 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:04,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:04,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:39:04,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:04,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:04,538 INFO L85 PathProgramCache]: Analyzing trace with hash 8574729, now seen corresponding path program 1 times [2023-01-28 06:39:04,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:04,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175698648] [2023-01-28 06:39:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:04,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:04,683 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 06:39:04,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:04,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175698648] [2023-01-28 06:39:04,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175698648] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:04,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:04,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:39:04,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158067250] [2023-01-28 06:39:04,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:04,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 06:39:04,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:04,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 06:39:04,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 06:39:04,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-01-28 06:39:04,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 49.0) internal successors, (98), 2 states have internal predecessors, (98), 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 06:39:04,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:04,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-01-28 06:39:04,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:04,737 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-01-28 06:39:04,737 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:04,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-01-28 06:39:04,739 INFO L137 encePairwiseOnDemand]: 106/108 looper letters, 0 selfloop transitions, 0 changer transitions 6/6 dead transitions. [2023-01-28 06:39:04,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-01-28 06:39:04,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 06:39:04,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 06:39:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 101 transitions. [2023-01-28 06:39:04,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2023-01-28 06:39:04,748 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 101 transitions. [2023-01-28 06:39:04,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 101 transitions. [2023-01-28 06:39:04,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:04,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 101 transitions. [2023-01-28 06:39:04,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 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 06:39:04,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 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 06:39:04,757 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 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 06:39:04,758 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 101 transitions. [2023-01-28 06:39:04,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-01-28 06:39:04,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 06:39:04,761 INFO L231 Difference]: Finished difference. Result has 10 places, 0 transitions, 0 flow [2023-01-28 06:39:04,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=10, PETRI_TRANSITIONS=0} [2023-01-28 06:39:04,765 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-01-28 06:39:04,765 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 0 transitions, 0 flow [2023-01-28 06:39:04,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 49.0) internal successors, (98), 2 states have internal predecessors, (98), 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 06:39:04,767 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-01-28 06:39:04,767 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-28 06:39:04,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 06:39:04,768 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:04,772 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-01-28 06:39:04,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 113 flow [2023-01-28 06:39:04,783 INFO L130 PetriNetUnfolder]: 6/64 cut-off events. [2023-01-28 06:39:04,783 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:04,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-01-28 06:39:04,784 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 54 transitions, 113 flow [2023-01-28 06:39:04,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 54 transitions, 113 flow [2023-01-28 06:39:04,784 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:04,784 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 54 transitions, 113 flow [2023-01-28 06:39:04,785 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 54 transitions, 113 flow [2023-01-28 06:39:04,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 113 flow [2023-01-28 06:39:04,791 INFO L130 PetriNetUnfolder]: 6/64 cut-off events. [2023-01-28 06:39:04,792 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:04,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-01-28 06:39:04,793 INFO L119 LiptonReduction]: Number of co-enabled transitions 754 [2023-01-28 06:39:06,111 INFO L134 LiptonReduction]: Checked pairs total: 600 [2023-01-28 06:39:06,111 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-01-28 06:39:06,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:39:06,114 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:06,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:39:06,115 INFO L130 PetriNetUnfolder]: 0/9 cut-off events. [2023-01-28 06:39:06,115 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:06,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:06,115 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 06:39:06,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:39:06,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:06,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1244398843, now seen corresponding path program 1 times [2023-01-28 06:39:06,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:06,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655076699] [2023-01-28 06:39:06,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:06,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:06,146 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:39:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:06,181 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:39:06,181 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:39:06,182 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:39:06,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 06:39:06,182 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:06,182 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:39:06,183 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:39:06,183 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 06:39:06,197 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:39:06,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2023-01-28 06:39:06,227 INFO L130 PetriNetUnfolder]: 11/106 cut-off events. [2023-01-28 06:39:06,227 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:39:06,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 106 events. 11/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-01-28 06:39:06,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 84 transitions, 180 flow [2023-01-28 06:39:06,231 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 84 transitions, 180 flow [2023-01-28 06:39:06,231 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:06,232 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 84 transitions, 180 flow [2023-01-28 06:39:06,232 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 84 transitions, 180 flow [2023-01-28 06:39:06,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2023-01-28 06:39:06,243 INFO L130 PetriNetUnfolder]: 11/106 cut-off events. [2023-01-28 06:39:06,243 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:39:06,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 106 events. 11/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-01-28 06:39:06,244 INFO L119 LiptonReduction]: Number of co-enabled transitions 3248 [2023-01-28 06:39:08,123 INFO L134 LiptonReduction]: Checked pairs total: 2852 [2023-01-28 06:39:08,123 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-01-28 06:39:08,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:39:08,125 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:08,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 06:39:08,126 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-28 06:39:08,126 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:08,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:08,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:39:08,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:08,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:08,127 INFO L85 PathProgramCache]: Analyzing trace with hash 16382335, now seen corresponding path program 1 times [2023-01-28 06:39:08,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:08,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473564007] [2023-01-28 06:39:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:08,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:08,166 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 06:39:08,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:08,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473564007] [2023-01-28 06:39:08,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473564007] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:08,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:08,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:39:08,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698934311] [2023-01-28 06:39:08,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:08,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 06:39:08,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:08,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 06:39:08,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 06:39:08,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-01-28 06:39:08,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 40 flow. Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 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 06:39:08,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:08,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-01-28 06:39:08,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:08,187 INFO L130 PetriNetUnfolder]: 20/57 cut-off events. [2023-01-28 06:39:08,187 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 06:39:08,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 57 events. 20/57 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 163 event pairs, 20 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 28. Up to 47 conditions per place. [2023-01-28 06:39:08,187 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-01-28 06:39:08,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 11 transitions, 50 flow [2023-01-28 06:39:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 06:39:08,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 06:39:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 155 transitions. [2023-01-28 06:39:08,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45857988165680474 [2023-01-28 06:39:08,191 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 155 transitions. [2023-01-28 06:39:08,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 155 transitions. [2023-01-28 06:39:08,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:08,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 155 transitions. [2023-01-28 06:39:08,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 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 06:39:08,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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 06:39:08,193 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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 06:39:08,193 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 40 flow. Second operand 2 states and 155 transitions. [2023-01-28 06:39:08,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 11 transitions, 50 flow [2023-01-28 06:39:08,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 11 transitions, 48 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-28 06:39:08,194 INFO L231 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2023-01-28 06:39:08,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2023-01-28 06:39:08,195 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -2 predicate places. [2023-01-28 06:39:08,195 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2023-01-28 06:39:08,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 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 06:39:08,195 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 06:39:08,195 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-28 06:39:08,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-28 06:39:08,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 06:39:08,196 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:08,196 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-01-28 06:39:08,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2023-01-28 06:39:08,205 INFO L130 PetriNetUnfolder]: 11/106 cut-off events. [2023-01-28 06:39:08,205 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:39:08,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 106 events. 11/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-01-28 06:39:08,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 84 transitions, 180 flow [2023-01-28 06:39:08,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 84 transitions, 180 flow [2023-01-28 06:39:08,206 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:08,206 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 84 transitions, 180 flow [2023-01-28 06:39:08,206 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 84 transitions, 180 flow [2023-01-28 06:39:08,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2023-01-28 06:39:08,213 INFO L130 PetriNetUnfolder]: 11/106 cut-off events. [2023-01-28 06:39:08,213 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:39:08,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 106 events. 11/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-01-28 06:39:08,215 INFO L119 LiptonReduction]: Number of co-enabled transitions 3248 [2023-01-28 06:39:09,857 INFO L134 LiptonReduction]: Checked pairs total: 2924 [2023-01-28 06:39:09,857 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-01-28 06:39:09,858 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:39:09,859 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:09,859 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:39:09,861 INFO L130 PetriNetUnfolder]: 1/21 cut-off events. [2023-01-28 06:39:09,861 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:39:09,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:09,861 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 06:39:09,861 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:39:09,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:09,862 INFO L85 PathProgramCache]: Analyzing trace with hash 946330714, now seen corresponding path program 1 times [2023-01-28 06:39:09,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:09,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455286925] [2023-01-28 06:39:09,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:09,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:09,874 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:39:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:09,892 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:39:09,892 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:39:09,892 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:39:09,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 06:39:09,893 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:09,893 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:39:09,893 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:39:09,893 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 06:39:09,913 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:39:09,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 249 flow [2023-01-28 06:39:09,925 INFO L130 PetriNetUnfolder]: 16/148 cut-off events. [2023-01-28 06:39:09,925 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:39:09,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 148 events. 16/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 325 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-01-28 06:39:09,926 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 114 transitions, 249 flow [2023-01-28 06:39:09,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 114 transitions, 249 flow [2023-01-28 06:39:09,927 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:09,927 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 114 transitions, 249 flow [2023-01-28 06:39:09,928 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 114 transitions, 249 flow [2023-01-28 06:39:09,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 249 flow [2023-01-28 06:39:09,943 INFO L130 PetriNetUnfolder]: 16/148 cut-off events. [2023-01-28 06:39:09,943 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:39:09,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 148 events. 16/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 325 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-01-28 06:39:09,947 INFO L119 LiptonReduction]: Number of co-enabled transitions 7482 [2023-01-28 06:39:12,318 INFO L134 LiptonReduction]: Checked pairs total: 7203 [2023-01-28 06:39:12,318 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-01-28 06:39:12,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:39:12,322 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:12,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 06:39:12,323 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-28 06:39:12,323 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:12,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:12,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:39:12,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:12,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:12,323 INFO L85 PathProgramCache]: Analyzing trace with hash 27029761, now seen corresponding path program 1 times [2023-01-28 06:39:12,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:12,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624019530] [2023-01-28 06:39:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:12,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:12,356 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 06:39:12,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:12,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624019530] [2023-01-28 06:39:12,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624019530] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:12,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:12,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:39:12,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727422635] [2023-01-28 06:39:12,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:12,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 06:39:12,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:12,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 06:39:12,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 06:39:12,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 237 [2023-01-28 06:39:12,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 57 flow. Second operand has 2 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 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 06:39:12,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:12,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 237 [2023-01-28 06:39:12,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:12,384 INFO L130 PetriNetUnfolder]: 110/225 cut-off events. [2023-01-28 06:39:12,384 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-01-28 06:39:12,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 225 events. 110/225 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 896 event pairs, 110 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 127. Up to 191 conditions per place. [2023-01-28 06:39:12,385 INFO L137 encePairwiseOnDemand]: 233/237 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2023-01-28 06:39:12,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 14 transitions, 71 flow [2023-01-28 06:39:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 06:39:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 06:39:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 209 transitions. [2023-01-28 06:39:12,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409282700421941 [2023-01-28 06:39:12,387 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 209 transitions. [2023-01-28 06:39:12,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 209 transitions. [2023-01-28 06:39:12,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:12,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 209 transitions. [2023-01-28 06:39:12,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 104.5) internal successors, (209), 2 states have internal predecessors, (209), 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 06:39:12,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 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 06:39:12,389 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 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 06:39:12,389 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 57 flow. Second operand 2 states and 209 transitions. [2023-01-28 06:39:12,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 14 transitions, 71 flow [2023-01-28 06:39:12,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 14 transitions, 65 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-01-28 06:39:12,390 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-01-28 06:39:12,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-01-28 06:39:12,391 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2023-01-28 06:39:12,391 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-01-28 06:39:12,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 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 06:39:12,391 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 06:39:12,391 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-28 06:39:12,391 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-28 06:39:12,391 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-28 06:39:12,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 06:39:12,392 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:12,392 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 06:39:12,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 249 flow [2023-01-28 06:39:12,403 INFO L130 PetriNetUnfolder]: 16/148 cut-off events. [2023-01-28 06:39:12,404 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:39:12,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 148 events. 16/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 325 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-01-28 06:39:12,404 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 114 transitions, 249 flow [2023-01-28 06:39:12,405 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 114 transitions, 249 flow [2023-01-28 06:39:12,405 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:12,405 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 114 transitions, 249 flow [2023-01-28 06:39:12,406 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 114 transitions, 249 flow [2023-01-28 06:39:12,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 249 flow [2023-01-28 06:39:12,415 INFO L130 PetriNetUnfolder]: 16/148 cut-off events. [2023-01-28 06:39:12,415 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:39:12,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 148 events. 16/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 325 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-01-28 06:39:12,418 INFO L119 LiptonReduction]: Number of co-enabled transitions 7482 [2023-01-28 06:39:14,780 INFO L134 LiptonReduction]: Checked pairs total: 7069 [2023-01-28 06:39:14,780 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-01-28 06:39:14,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:39:14,782 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:14,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:39:14,787 INFO L130 PetriNetUnfolder]: 1/29 cut-off events. [2023-01-28 06:39:14,787 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:39:14,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:14,787 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 06:39:14,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:39:14,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash -708252400, now seen corresponding path program 1 times [2023-01-28 06:39:14,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:14,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451845227] [2023-01-28 06:39:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:14,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:14,804 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:39:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:14,823 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:39:14,823 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:39:14,824 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:39:14,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 06:39:14,825 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:14,825 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:39:14,825 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:39:14,825 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 06:39:14,837 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:39:14,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 320 flow [2023-01-28 06:39:14,851 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2023-01-28 06:39:14,851 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:39:14,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 475 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 156. Up to 10 conditions per place. [2023-01-28 06:39:14,852 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 144 transitions, 320 flow [2023-01-28 06:39:14,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 144 transitions, 320 flow [2023-01-28 06:39:14,853 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:14,853 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 144 transitions, 320 flow [2023-01-28 06:39:14,853 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 144 transitions, 320 flow [2023-01-28 06:39:14,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 320 flow [2023-01-28 06:39:14,866 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2023-01-28 06:39:14,866 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:39:14,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 475 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 156. Up to 10 conditions per place. [2023-01-28 06:39:14,872 INFO L119 LiptonReduction]: Number of co-enabled transitions 13456 [2023-01-28 06:39:17,547 INFO L134 LiptonReduction]: Checked pairs total: 12977 [2023-01-28 06:39:17,547 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-01-28 06:39:17,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:39:17,549 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:17,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-28 06:39:17,550 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-01-28 06:39:17,550 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:17,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:17,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:39:17,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 06:39:17,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:17,550 INFO L85 PathProgramCache]: Analyzing trace with hash 40961392, now seen corresponding path program 1 times [2023-01-28 06:39:17,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:17,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476751710] [2023-01-28 06:39:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:17,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:17,574 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 06:39:17,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:17,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476751710] [2023-01-28 06:39:17,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476751710] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:17,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:17,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:39:17,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302044017] [2023-01-28 06:39:17,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:17,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 06:39:17,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:17,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 06:39:17,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 06:39:17,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 301 [2023-01-28 06:39:17,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 80 flow. Second operand has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 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 06:39:17,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:17,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 301 [2023-01-28 06:39:17,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:17,662 INFO L130 PetriNetUnfolder]: 488/837 cut-off events. [2023-01-28 06:39:17,663 INFO L131 PetriNetUnfolder]: For 448/448 co-relation queries the response was YES. [2023-01-28 06:39:17,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 837 events. 488/837 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3901 event pairs, 488 based on Foata normal form. 0/797 useless extension candidates. Maximal degree in co-relation 511. Up to 731 conditions per place. [2023-01-28 06:39:17,664 INFO L137 encePairwiseOnDemand]: 295/301 looper letters, 0 selfloop transitions, 0 changer transitions 17/17 dead transitions. [2023-01-28 06:39:17,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 17 transitions, 94 flow [2023-01-28 06:39:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 06:39:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 06:39:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 264 transitions. [2023-01-28 06:39:17,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2023-01-28 06:39:17,669 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 264 transitions. [2023-01-28 06:39:17,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 264 transitions. [2023-01-28 06:39:17,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:17,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 264 transitions. [2023-01-28 06:39:17,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 132.0) internal successors, (264), 2 states have internal predecessors, (264), 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 06:39:17,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 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 06:39:17,673 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 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 06:39:17,673 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 80 flow. Second operand 2 states and 264 transitions. [2023-01-28 06:39:17,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 17 transitions, 94 flow [2023-01-28 06:39:17,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 82 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-01-28 06:39:17,676 INFO L231 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2023-01-28 06:39:17,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2023-01-28 06:39:17,678 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-01-28 06:39:17,679 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2023-01-28 06:39:17,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 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 06:39:17,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-01-28 06:39:17,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-28 06:39:17,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-28 06:39:17,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-28 06:39:17,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-28 06:39:17,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 06:39:17,680 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:17,680 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 06:39:17,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 320 flow [2023-01-28 06:39:17,698 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2023-01-28 06:39:17,698 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:39:17,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 475 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 156. Up to 10 conditions per place. [2023-01-28 06:39:17,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 144 transitions, 320 flow [2023-01-28 06:39:17,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 144 transitions, 320 flow [2023-01-28 06:39:17,700 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:17,700 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 144 transitions, 320 flow [2023-01-28 06:39:17,700 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 144 transitions, 320 flow [2023-01-28 06:39:17,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 320 flow [2023-01-28 06:39:17,714 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2023-01-28 06:39:17,714 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:39:17,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 475 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 156. Up to 10 conditions per place. [2023-01-28 06:39:17,720 INFO L119 LiptonReduction]: Number of co-enabled transitions 13456 [2023-01-28 06:39:20,450 INFO L134 LiptonReduction]: Checked pairs total: 12491 [2023-01-28 06:39:20,450 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-01-28 06:39:20,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:39:20,451 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:20,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:39:20,454 INFO L130 PetriNetUnfolder]: 1/37 cut-off events. [2023-01-28 06:39:20,454 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:39:20,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:20,454 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:20,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:39:20,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:20,455 INFO L85 PathProgramCache]: Analyzing trace with hash 185963096, now seen corresponding path program 1 times [2023-01-28 06:39:20,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:20,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362268706] [2023-01-28 06:39:20,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:20,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:20,465 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:39:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:20,473 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:39:20,473 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:39:20,473 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:39:20,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 06:39:20,474 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:20,474 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:39:20,474 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:39:20,474 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-28 06:39:20,486 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:39:20,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 393 flow [2023-01-28 06:39:20,504 INFO L130 PetriNetUnfolder]: 26/232 cut-off events. [2023-01-28 06:39:20,504 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:39:20,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 232 events. 26/232 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 625 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 204. Up to 12 conditions per place. [2023-01-28 06:39:20,506 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 174 transitions, 393 flow [2023-01-28 06:39:20,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 174 transitions, 393 flow [2023-01-28 06:39:20,507 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:20,507 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 174 transitions, 393 flow [2023-01-28 06:39:20,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 174 transitions, 393 flow [2023-01-28 06:39:20,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 393 flow [2023-01-28 06:39:20,522 INFO L130 PetriNetUnfolder]: 26/232 cut-off events. [2023-01-28 06:39:20,522 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:39:20,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 232 events. 26/232 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 625 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 204. Up to 12 conditions per place. [2023-01-28 06:39:20,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 21170 [2023-01-28 06:39:24,047 INFO L134 LiptonReduction]: Checked pairs total: 21832 [2023-01-28 06:39:24,048 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-01-28 06:39:24,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:39:24,049 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:24,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-28 06:39:24,049 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-01-28 06:39:24,050 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:24,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:24,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:39:24,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 06:39:24,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:24,050 INFO L85 PathProgramCache]: Analyzing trace with hash 57765716, now seen corresponding path program 1 times [2023-01-28 06:39:24,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:24,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972154639] [2023-01-28 06:39:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:24,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:24,067 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 06:39:24,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:24,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972154639] [2023-01-28 06:39:24,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972154639] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:24,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:24,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:39:24,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465013869] [2023-01-28 06:39:24,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:24,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 06:39:24,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:24,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 06:39:24,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 06:39:24,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 369 [2023-01-28 06:39:24,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 101 flow. Second operand has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 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 06:39:24,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:24,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 369 [2023-01-28 06:39:24,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:24,310 INFO L130 PetriNetUnfolder]: 1946/2997 cut-off events. [2023-01-28 06:39:24,310 INFO L131 PetriNetUnfolder]: For 2176/2176 co-relation queries the response was YES. [2023-01-28 06:39:24,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6751 conditions, 2997 events. 1946/2997 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15443 event pairs, 1946 based on Foata normal form. 0/2876 useless extension candidates. Maximal degree in co-relation 1924. Up to 2675 conditions per place. [2023-01-28 06:39:24,316 INFO L137 encePairwiseOnDemand]: 362/369 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-01-28 06:39:24,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 20 transitions, 119 flow [2023-01-28 06:39:24,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 06:39:24,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 06:39:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 318 transitions. [2023-01-28 06:39:24,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2023-01-28 06:39:24,318 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 318 transitions. [2023-01-28 06:39:24,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 318 transitions. [2023-01-28 06:39:24,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:24,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 318 transitions. [2023-01-28 06:39:24,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 159.0) internal successors, (318), 2 states have internal predecessors, (318), 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 06:39:24,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 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 06:39:24,321 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 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 06:39:24,321 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 101 flow. Second operand 2 states and 318 transitions. [2023-01-28 06:39:24,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 20 transitions, 119 flow [2023-01-28 06:39:24,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 99 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-01-28 06:39:24,324 INFO L231 Difference]: Finished difference. Result has 32 places, 0 transitions, 0 flow [2023-01-28 06:39:24,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=32, PETRI_TRANSITIONS=0} [2023-01-28 06:39:24,326 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-01-28 06:39:24,326 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 0 transitions, 0 flow [2023-01-28 06:39:24,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 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 06:39:24,326 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-01-28 06:39:24,326 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-28 06:39:24,327 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-28 06:39:24,327 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-28 06:39:24,327 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-28 06:39:24,327 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-28 06:39:24,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 06:39:24,327 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:24,328 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 06:39:24,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 393 flow [2023-01-28 06:39:24,344 INFO L130 PetriNetUnfolder]: 26/232 cut-off events. [2023-01-28 06:39:24,344 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:39:24,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 232 events. 26/232 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 625 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 204. Up to 12 conditions per place. [2023-01-28 06:39:24,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 174 transitions, 393 flow [2023-01-28 06:39:24,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 174 transitions, 393 flow [2023-01-28 06:39:24,347 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:24,347 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 174 transitions, 393 flow [2023-01-28 06:39:24,347 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 174 transitions, 393 flow [2023-01-28 06:39:24,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 393 flow [2023-01-28 06:39:24,361 INFO L130 PetriNetUnfolder]: 26/232 cut-off events. [2023-01-28 06:39:24,361 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:39:24,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 232 events. 26/232 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 625 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 204. Up to 12 conditions per place. [2023-01-28 06:39:24,366 INFO L119 LiptonReduction]: Number of co-enabled transitions 21170 [2023-01-28 06:39:27,834 INFO L134 LiptonReduction]: Checked pairs total: 21056 [2023-01-28 06:39:27,834 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-01-28 06:39:27,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:39:27,836 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:27,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:39:27,839 INFO L130 PetriNetUnfolder]: 1/45 cut-off events. [2023-01-28 06:39:27,839 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:39:27,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:27,839 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:27,839 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:39:27,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:27,839 INFO L85 PathProgramCache]: Analyzing trace with hash 70553239, now seen corresponding path program 1 times [2023-01-28 06:39:27,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:27,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843723861] [2023-01-28 06:39:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:27,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:27,854 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:39:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:27,861 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:39:27,861 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:39:27,861 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:39:27,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 06:39:27,862 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:27,862 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:39:27,862 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:39:27,862 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-01-28 06:39:27,888 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:39:27,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 468 flow [2023-01-28 06:39:27,910 INFO L130 PetriNetUnfolder]: 31/274 cut-off events. [2023-01-28 06:39:27,910 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-28 06:39:27,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 274 events. 31/274 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 749 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 254. Up to 14 conditions per place. [2023-01-28 06:39:27,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 204 transitions, 468 flow [2023-01-28 06:39:27,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 204 transitions, 468 flow [2023-01-28 06:39:27,916 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:27,916 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 204 transitions, 468 flow [2023-01-28 06:39:27,917 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 204 transitions, 468 flow [2023-01-28 06:39:27,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 468 flow [2023-01-28 06:39:27,940 INFO L130 PetriNetUnfolder]: 31/274 cut-off events. [2023-01-28 06:39:27,940 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-28 06:39:27,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 274 events. 31/274 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 749 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 254. Up to 14 conditions per place. [2023-01-28 06:39:27,951 INFO L119 LiptonReduction]: Number of co-enabled transitions 30624 [2023-01-28 06:39:31,673 INFO L134 LiptonReduction]: Checked pairs total: 28067 [2023-01-28 06:39:31,673 INFO L136 LiptonReduction]: Total number of compositions: 222 [2023-01-28 06:39:31,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:39:31,674 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:31,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-28 06:39:31,675 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-28 06:39:31,675 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:31,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:31,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:39:31,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-28 06:39:31,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:31,676 INFO L85 PathProgramCache]: Analyzing trace with hash 77936856, now seen corresponding path program 1 times [2023-01-28 06:39:31,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:31,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172821831] [2023-01-28 06:39:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:31,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:31,695 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 06:39:31,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:31,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172821831] [2023-01-28 06:39:31,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172821831] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:31,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:31,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:39:31,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331086745] [2023-01-28 06:39:31,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:31,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 06:39:31,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:31,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 06:39:31,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 06:39:31,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 426 [2023-01-28 06:39:31,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 128 flow. Second operand has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 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 06:39:31,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:31,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 426 [2023-01-28 06:39:31,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:32,592 INFO L130 PetriNetUnfolder]: 7292/10449 cut-off events. [2023-01-28 06:39:32,593 INFO L131 PetriNetUnfolder]: For 9628/9628 co-relation queries the response was YES. [2023-01-28 06:39:32,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23762 conditions, 10449 events. 7292/10449 cut-off events. For 9628/9628 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57340 event pairs, 7292 based on Foata normal form. 0/10085 useless extension candidates. Maximal degree in co-relation 6946. Up to 9479 conditions per place. [2023-01-28 06:39:32,619 INFO L137 encePairwiseOnDemand]: 417/426 looper letters, 0 selfloop transitions, 0 changer transitions 23/23 dead transitions. [2023-01-28 06:39:32,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 23 transitions, 146 flow [2023-01-28 06:39:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 06:39:32,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 06:39:32,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 373 transitions. [2023-01-28 06:39:32,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43779342723004694 [2023-01-28 06:39:32,621 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 373 transitions. [2023-01-28 06:39:32,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 373 transitions. [2023-01-28 06:39:32,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:32,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 373 transitions. [2023-01-28 06:39:32,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 186.5) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:32,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 426.0) internal successors, (1278), 3 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:32,623 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 426.0) internal successors, (1278), 3 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:32,623 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 128 flow. Second operand 2 states and 373 transitions. [2023-01-28 06:39:32,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 23 transitions, 146 flow [2023-01-28 06:39:32,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 23 transitions, 116 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-01-28 06:39:32,628 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2023-01-28 06:39:32,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2023-01-28 06:39:32,630 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -8 predicate places. [2023-01-28 06:39:32,630 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2023-01-28 06:39:32,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 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 06:39:32,630 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-01-28 06:39:32,630 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-01-28 06:39:32,630 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-01-28 06:39:32,630 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-01-28 06:39:32,630 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-01-28 06:39:32,631 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-01-28 06:39:32,631 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-01-28 06:39:32,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 06:39:32,631 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:32,631 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 06:39:32,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 468 flow [2023-01-28 06:39:32,653 INFO L130 PetriNetUnfolder]: 31/274 cut-off events. [2023-01-28 06:39:32,654 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-28 06:39:32,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 274 events. 31/274 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 749 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 254. Up to 14 conditions per place. [2023-01-28 06:39:32,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 204 transitions, 468 flow [2023-01-28 06:39:32,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 204 transitions, 468 flow [2023-01-28 06:39:32,657 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:32,657 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 204 transitions, 468 flow [2023-01-28 06:39:32,657 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 204 transitions, 468 flow [2023-01-28 06:39:32,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 468 flow [2023-01-28 06:39:32,677 INFO L130 PetriNetUnfolder]: 31/274 cut-off events. [2023-01-28 06:39:32,677 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-28 06:39:32,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 274 events. 31/274 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 749 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 254. Up to 14 conditions per place. [2023-01-28 06:39:32,683 INFO L119 LiptonReduction]: Number of co-enabled transitions 30624 [2023-01-28 06:39:36,430 INFO L134 LiptonReduction]: Checked pairs total: 27214 [2023-01-28 06:39:36,430 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-01-28 06:39:36,431 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:39:36,431 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:36,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:39:36,434 INFO L130 PetriNetUnfolder]: 2/55 cut-off events. [2023-01-28 06:39:36,434 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-28 06:39:36,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:36,435 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:36,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:39:36,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:36,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1812128802, now seen corresponding path program 1 times [2023-01-28 06:39:36,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:36,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954928542] [2023-01-28 06:39:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:36,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:36,447 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:39:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:36,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:39:36,457 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:39:36,457 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:39:36,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 06:39:36,458 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:36,458 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:39:36,458 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:39:36,458 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-01-28 06:39:36,473 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:39:36,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 545 flow [2023-01-28 06:39:36,500 INFO L130 PetriNetUnfolder]: 36/316 cut-off events. [2023-01-28 06:39:36,500 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-28 06:39:36,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 316 events. 36/316 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 916 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 305. Up to 16 conditions per place. [2023-01-28 06:39:36,503 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 234 transitions, 545 flow [2023-01-28 06:39:36,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 234 transitions, 545 flow [2023-01-28 06:39:36,505 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:36,505 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 234 transitions, 545 flow [2023-01-28 06:39:36,505 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 234 transitions, 545 flow [2023-01-28 06:39:36,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 545 flow [2023-01-28 06:39:36,531 INFO L130 PetriNetUnfolder]: 36/316 cut-off events. [2023-01-28 06:39:36,531 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-28 06:39:36,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 316 events. 36/316 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 916 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 305. Up to 16 conditions per place. [2023-01-28 06:39:36,540 INFO L119 LiptonReduction]: Number of co-enabled transitions 41818 [2023-01-28 06:39:41,139 INFO L134 LiptonReduction]: Checked pairs total: 40117 [2023-01-28 06:39:41,139 INFO L136 LiptonReduction]: Total number of compositions: 260 [2023-01-28 06:39:41,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:39:41,141 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:41,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-01-28 06:39:41,141 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-28 06:39:41,141 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:41,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:41,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:39:41,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-28 06:39:41,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:41,142 INFO L85 PathProgramCache]: Analyzing trace with hash 100762105, now seen corresponding path program 1 times [2023-01-28 06:39:41,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:41,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862809403] [2023-01-28 06:39:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:41,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:41,162 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 06:39:41,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:41,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862809403] [2023-01-28 06:39:41,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862809403] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:41,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:41,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:39:41,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062710711] [2023-01-28 06:39:41,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:41,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 06:39:41,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:41,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 06:39:41,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 06:39:41,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 494 [2023-01-28 06:39:41,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 149 flow. Second operand has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 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 06:39:41,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:41,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 494 [2023-01-28 06:39:41,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:43,862 INFO L130 PetriNetUnfolder]: 26246/35721 cut-off events. [2023-01-28 06:39:43,862 INFO L131 PetriNetUnfolder]: For 40003/40003 co-relation queries the response was YES. [2023-01-28 06:39:43,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81840 conditions, 35721 events. 26246/35721 cut-off events. For 40003/40003 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 205632 event pairs, 26246 based on Foata normal form. 0/34628 useless extension candidates. Maximal degree in co-relation 24361. Up to 32807 conditions per place. [2023-01-28 06:39:43,939 INFO L137 encePairwiseOnDemand]: 485/494 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-01-28 06:39:43,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 26 transitions, 175 flow [2023-01-28 06:39:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 06:39:43,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 06:39:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 426 transitions. [2023-01-28 06:39:43,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311740890688259 [2023-01-28 06:39:43,941 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 426 transitions. [2023-01-28 06:39:43,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 426 transitions. [2023-01-28 06:39:43,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:43,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 426 transitions. [2023-01-28 06:39:43,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 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 06:39:43,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 494.0) internal successors, (1482), 3 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:43,943 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 494.0) internal successors, (1482), 3 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:43,943 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 149 flow. Second operand 2 states and 426 transitions. [2023-01-28 06:39:43,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 26 transitions, 175 flow [2023-01-28 06:39:43,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 26 transitions, 133 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-01-28 06:39:43,964 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2023-01-28 06:39:43,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=494, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2023-01-28 06:39:43,964 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2023-01-28 06:39:43,964 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2023-01-28 06:39:43,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 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 06:39:43,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 8 remaining) [2023-01-28 06:39:43,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-01-28 06:39:43,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-01-28 06:39:43,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-01-28 06:39:43,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-01-28 06:39:43,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-01-28 06:39:43,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-01-28 06:39:43,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-01-28 06:39:43,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 06:39:43,965 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:43,966 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 06:39:43,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 545 flow [2023-01-28 06:39:43,991 INFO L130 PetriNetUnfolder]: 36/316 cut-off events. [2023-01-28 06:39:43,991 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-28 06:39:43,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 316 events. 36/316 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 916 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 305. Up to 16 conditions per place. [2023-01-28 06:39:43,993 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 234 transitions, 545 flow [2023-01-28 06:39:43,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 234 transitions, 545 flow [2023-01-28 06:39:43,995 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:43,995 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 234 transitions, 545 flow [2023-01-28 06:39:43,995 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 234 transitions, 545 flow [2023-01-28 06:39:43,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 545 flow [2023-01-28 06:39:44,019 INFO L130 PetriNetUnfolder]: 36/316 cut-off events. [2023-01-28 06:39:44,019 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-28 06:39:44,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 316 events. 36/316 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 916 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 305. Up to 16 conditions per place. [2023-01-28 06:39:44,028 INFO L119 LiptonReduction]: Number of co-enabled transitions 41818 [2023-01-28 06:39:48,638 INFO L134 LiptonReduction]: Checked pairs total: 40847 [2023-01-28 06:39:48,639 INFO L136 LiptonReduction]: Total number of compositions: 266 [2023-01-28 06:39:48,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:39:48,640 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:48,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:39:48,643 INFO L130 PetriNetUnfolder]: 1/61 cut-off events. [2023-01-28 06:39:48,643 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-28 06:39:48,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:48,643 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:48,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:39:48,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:48,644 INFO L85 PathProgramCache]: Analyzing trace with hash -402409257, now seen corresponding path program 1 times [2023-01-28 06:39:48,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:48,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416390818] [2023-01-28 06:39:48,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:48,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:48,663 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:39:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:48,690 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:39:48,690 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:39:48,690 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:39:48,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 06:39:48,691 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:48,691 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:39:48,691 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:39:48,691 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-01-28 06:39:48,710 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:39:48,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 624 flow [2023-01-28 06:39:48,741 INFO L130 PetriNetUnfolder]: 41/358 cut-off events. [2023-01-28 06:39:48,741 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-28 06:39:48,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 358 events. 41/358 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1066 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-01-28 06:39:48,744 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 264 transitions, 624 flow [2023-01-28 06:39:48,747 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 264 transitions, 624 flow [2023-01-28 06:39:48,747 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:48,747 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 264 transitions, 624 flow [2023-01-28 06:39:48,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 264 transitions, 624 flow [2023-01-28 06:39:48,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 624 flow [2023-01-28 06:39:48,777 INFO L130 PetriNetUnfolder]: 41/358 cut-off events. [2023-01-28 06:39:48,777 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-28 06:39:48,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 358 events. 41/358 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1066 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-01-28 06:39:48,789 INFO L119 LiptonReduction]: Number of co-enabled transitions 54752 [2023-01-28 06:39:54,387 INFO L134 LiptonReduction]: Checked pairs total: 55113 [2023-01-28 06:39:54,388 INFO L136 LiptonReduction]: Total number of compositions: 297 [2023-01-28 06:39:54,389 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:39:54,389 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:54,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-01-28 06:39:54,390 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-28 06:39:54,390 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:54,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:54,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:39:54,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-28 06:39:54,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:54,390 INFO L85 PathProgramCache]: Analyzing trace with hash 126948684, now seen corresponding path program 1 times [2023-01-28 06:39:54,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:54,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466048855] [2023-01-28 06:39:54,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:54,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:54,399 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 06:39:54,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:54,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466048855] [2023-01-28 06:39:54,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466048855] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:54,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:54,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:39:54,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096014273] [2023-01-28 06:39:54,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:54,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 06:39:54,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:54,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 06:39:54,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 06:39:54,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 561 [2023-01-28 06:39:54,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 180 flow. Second operand has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 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 06:39:54,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:54,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 561 [2023-01-28 06:39:54,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:40:04,023 INFO L130 PetriNetUnfolder]: 91856/120285 cut-off events. [2023-01-28 06:40:04,024 INFO L131 PetriNetUnfolder]: For 158830/158830 co-relation queries the response was YES. [2023-01-28 06:40:04,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277213 conditions, 120285 events. 91856/120285 cut-off events. For 158830/158830 co-relation queries the response was YES. Maximal size of possible extension queue 4108. Compared 716324 event pairs, 91856 based on Foata normal form. 0/117005 useless extension candidates. Maximal degree in co-relation 83653. Up to 111539 conditions per place. [2023-01-28 06:40:04,330 INFO L137 encePairwiseOnDemand]: 550/561 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2023-01-28 06:40:04,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 29 transitions, 206 flow [2023-01-28 06:40:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 06:40:04,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 06:40:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 481 transitions. [2023-01-28 06:40:04,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428698752228164 [2023-01-28 06:40:04,331 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 481 transitions. [2023-01-28 06:40:04,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 481 transitions. [2023-01-28 06:40:04,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:40:04,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 481 transitions. [2023-01-28 06:40:04,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 240.5) internal successors, (481), 2 states have internal predecessors, (481), 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 06:40:04,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 561.0) internal successors, (1683), 3 states have internal predecessors, (1683), 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 06:40:04,334 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 561.0) internal successors, (1683), 3 states have internal predecessors, (1683), 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 06:40:04,335 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 180 flow. Second operand 2 states and 481 transitions. [2023-01-28 06:40:04,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 29 transitions, 206 flow [2023-01-28 06:40:04,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 29 transitions, 150 flow, removed 28 selfloop flow, removed 0 redundant places. [2023-01-28 06:40:04,584 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2023-01-28 06:40:04,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=561, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, 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=2, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2023-01-28 06:40:04,585 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-01-28 06:40:04,585 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2023-01-28 06:40:04,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 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 06:40:04,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 9 remaining) [2023-01-28 06:40:04,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-01-28 06:40:04,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-01-28 06:40:04,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-01-28 06:40:04,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-01-28 06:40:04,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-01-28 06:40:04,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-01-28 06:40:04,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-01-28 06:40:04,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-01-28 06:40:04,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-28 06:40:04,586 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:40:04,586 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 06:40:04,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 624 flow [2023-01-28 06:40:04,617 INFO L130 PetriNetUnfolder]: 41/358 cut-off events. [2023-01-28 06:40:04,617 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-28 06:40:04,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 358 events. 41/358 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1066 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-01-28 06:40:04,620 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 264 transitions, 624 flow [2023-01-28 06:40:04,622 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 264 transitions, 624 flow [2023-01-28 06:40:04,622 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:40:04,623 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 264 transitions, 624 flow [2023-01-28 06:40:04,623 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 264 transitions, 624 flow [2023-01-28 06:40:04,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 624 flow [2023-01-28 06:40:04,654 INFO L130 PetriNetUnfolder]: 41/358 cut-off events. [2023-01-28 06:40:04,654 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-28 06:40:04,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 358 events. 41/358 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1066 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-01-28 06:40:04,665 INFO L119 LiptonReduction]: Number of co-enabled transitions 54752 [2023-01-28 06:40:10,041 INFO L134 LiptonReduction]: Checked pairs total: 55690 [2023-01-28 06:40:10,041 INFO L136 LiptonReduction]: Total number of compositions: 299 [2023-01-28 06:40:10,044 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:40:10,044 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:40:10,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:40:10,049 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2023-01-28 06:40:10,050 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-28 06:40:10,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:40:10,050 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:40:10,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:40:10,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:40:10,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1266315901, now seen corresponding path program 1 times [2023-01-28 06:40:10,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:40:10,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335015918] [2023-01-28 06:40:10,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:40:10,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:40:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:40:10,074 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:40:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:40:10,091 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:40:10,093 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:40:10,093 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:40:10,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-28 06:40:10,094 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:40:10,094 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:40:10,094 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:40:10,094 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-01-28 06:40:10,118 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:40:10,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 705 flow [2023-01-28 06:40:10,167 INFO L130 PetriNetUnfolder]: 46/400 cut-off events. [2023-01-28 06:40:10,167 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-01-28 06:40:10,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 400 events. 46/400 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1216 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-01-28 06:40:10,171 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 294 transitions, 705 flow [2023-01-28 06:40:10,174 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 294 transitions, 705 flow [2023-01-28 06:40:10,174 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:40:10,174 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 294 transitions, 705 flow [2023-01-28 06:40:10,174 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 294 transitions, 705 flow [2023-01-28 06:40:10,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 705 flow [2023-01-28 06:40:10,219 INFO L130 PetriNetUnfolder]: 46/400 cut-off events. [2023-01-28 06:40:10,219 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-01-28 06:40:10,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 400 events. 46/400 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1216 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-01-28 06:40:10,238 INFO L119 LiptonReduction]: Number of co-enabled transitions 69426 [2023-01-28 06:40:16,139 INFO L134 LiptonReduction]: Checked pairs total: 66793 [2023-01-28 06:40:16,139 INFO L136 LiptonReduction]: Total number of compositions: 325 [2023-01-28 06:40:16,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:40:16,141 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:40:16,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-01-28 06:40:16,141 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-28 06:40:16,142 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:40:16,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:40:16,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:40:16,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-01-28 06:40:16,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:40:16,142 INFO L85 PathProgramCache]: Analyzing trace with hash 156223280, now seen corresponding path program 1 times [2023-01-28 06:40:16,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:40:16,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068142130] [2023-01-28 06:40:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:40:16,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:40:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:40:16,155 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 06:40:16,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:40:16,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068142130] [2023-01-28 06:40:16,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068142130] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:40:16,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:40:16,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:40:16,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797971749] [2023-01-28 06:40:16,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:40:16,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 06:40:16,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:40:16,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 06:40:16,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 06:40:16,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 619 [2023-01-28 06:40:16,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 205 flow. Second operand has 2 states, 2 states have (on average 249.0) internal successors, (498), 2 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:16,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:40:16,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 619 [2023-01-28 06:40:16,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:40:50,227 INFO L130 PetriNetUnfolder]: 314930/400221 cut-off events. [2023-01-28 06:40:50,227 INFO L131 PetriNetUnfolder]: For 609352/609352 co-relation queries the response was YES. [2023-01-28 06:40:51,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926753 conditions, 400221 events. 314930/400221 cut-off events. For 609352/609352 co-relation queries the response was YES. Maximal size of possible extension queue 11911. Compared 2455636 event pairs, 314930 based on Foata normal form. 0/390380 useless extension candidates. Maximal degree in co-relation 282670. Up to 373979 conditions per place. [2023-01-28 06:40:51,317 INFO L137 encePairwiseOnDemand]: 608/619 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2023-01-28 06:40:51,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 32 transitions, 239 flow [2023-01-28 06:40:51,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 06:40:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 06:40:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 534 transitions. [2023-01-28 06:40:51,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43134087237479807 [2023-01-28 06:40:51,319 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 534 transitions. [2023-01-28 06:40:51,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 534 transitions. [2023-01-28 06:40:51,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:40:51,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 534 transitions. [2023-01-28 06:40:51,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 267.0) internal successors, (534), 2 states have internal predecessors, (534), 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 06:40:51,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 619.0) internal successors, (1857), 3 states have internal predecessors, (1857), 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 06:40:51,322 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 619.0) internal successors, (1857), 3 states have internal predecessors, (1857), 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 06:40:51,322 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 205 flow. Second operand 2 states and 534 transitions. [2023-01-28 06:40:51,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 32 transitions, 239 flow [2023-01-28 06:40:52,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 32 transitions, 167 flow, removed 36 selfloop flow, removed 0 redundant places. [2023-01-28 06:40:52,406 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2023-01-28 06:40:52,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2023-01-28 06:40:52,406 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -10 predicate places. [2023-01-28 06:40:52,406 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2023-01-28 06:40:52,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 249.0) internal successors, (498), 2 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:52,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (9 of 10 remaining) [2023-01-28 06:40:52,407 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2023-01-28 06:40:52,407 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2023-01-28 06:40:52,407 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2023-01-28 06:40:52,407 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2023-01-28 06:40:52,407 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2023-01-28 06:40:52,407 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2023-01-28 06:40:52,407 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2023-01-28 06:40:52,407 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2023-01-28 06:40:52,407 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2023-01-28 06:40:52,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-28 06:40:52,407 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:40:52,407 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 06:40:52,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 705 flow [2023-01-28 06:40:52,445 INFO L130 PetriNetUnfolder]: 46/400 cut-off events. [2023-01-28 06:40:52,446 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-01-28 06:40:52,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 400 events. 46/400 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1216 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-01-28 06:40:52,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 294 transitions, 705 flow [2023-01-28 06:40:52,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 294 transitions, 705 flow [2023-01-28 06:40:52,451 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:40:52,451 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 294 transitions, 705 flow [2023-01-28 06:40:52,451 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 294 transitions, 705 flow [2023-01-28 06:40:52,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 705 flow [2023-01-28 06:40:52,488 INFO L130 PetriNetUnfolder]: 46/400 cut-off events. [2023-01-28 06:40:52,488 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-01-28 06:40:52,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 400 events. 46/400 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1216 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-01-28 06:40:52,503 INFO L119 LiptonReduction]: Number of co-enabled transitions 69426 [2023-01-28 06:40:58,034 INFO L134 LiptonReduction]: Checked pairs total: 68764 [2023-01-28 06:40:58,034 INFO L136 LiptonReduction]: Total number of compositions: 328 [2023-01-28 06:40:58,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:40:58,037 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:40:58,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:40:58,042 INFO L130 PetriNetUnfolder]: 3/81 cut-off events. [2023-01-28 06:40:58,042 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-01-28 06:40:58,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:40:58,042 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:40:58,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:40:58,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:40:58,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1079706746, now seen corresponding path program 1 times [2023-01-28 06:40:58,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:40:58,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028417874] [2023-01-28 06:40:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:40:58,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:40:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:40:58,061 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:40:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:40:58,075 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:40:58,075 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:40:58,075 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:40:58,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-01-28 06:40:58,075 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:40:58,075 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:40:58,076 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:40:58,076 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-01-28 06:40:58,097 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:40:58,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 324 transitions, 788 flow [2023-01-28 06:40:58,141 INFO L130 PetriNetUnfolder]: 51/442 cut-off events. [2023-01-28 06:40:58,142 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-01-28 06:40:58,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 442 events. 51/442 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1362 event pairs, 0 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 464. Up to 22 conditions per place. [2023-01-28 06:40:58,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 304 places, 324 transitions, 788 flow [2023-01-28 06:40:58,150 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 324 transitions, 788 flow [2023-01-28 06:40:58,150 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:40:58,150 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 304 places, 324 transitions, 788 flow [2023-01-28 06:40:58,150 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 304 places, 324 transitions, 788 flow [2023-01-28 06:40:58,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 324 transitions, 788 flow [2023-01-28 06:40:58,306 INFO L130 PetriNetUnfolder]: 51/442 cut-off events. [2023-01-28 06:40:58,306 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-01-28 06:40:58,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 442 events. 51/442 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1362 event pairs, 0 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 464. Up to 22 conditions per place. [2023-01-28 06:40:58,320 INFO L119 LiptonReduction]: Number of co-enabled transitions 85840 [2023-01-28 06:41:04,287 INFO L134 LiptonReduction]: Checked pairs total: 82447 [2023-01-28 06:41:04,288 INFO L136 LiptonReduction]: Total number of compositions: 367 [2023-01-28 06:41:04,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:41:04,289 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;@66bc14bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:41:04,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-01-28 06:41:04,289 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-01-28 06:41:04,289 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:41:04,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:41:04,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:41:04,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-01-28 06:41:04,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:41:04,290 INFO L85 PathProgramCache]: Analyzing trace with hash 188120353, now seen corresponding path program 1 times [2023-01-28 06:41:04,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:41:04,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982758693] [2023-01-28 06:41:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:41:04,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:41:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:41:04,298 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 06:41:04,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:41:04,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982758693] [2023-01-28 06:41:04,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982758693] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:41:04,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:41:04,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:41:04,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649843042] [2023-01-28 06:41:04,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:41:04,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 06:41:04,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:41:04,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 06:41:04,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 06:41:04,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 691 [2023-01-28 06:41:04,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 248 flow. Second operand has 2 states, 2 states have (on average 274.0) internal successors, (548), 2 states have internal predecessors, (548), 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 06:41:04,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:41:04,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 691 [2023-01-28 06:41:04,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand