./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c0827ac193c1e2b03d5ccf1e60b62c7d6ff1b4feade2c409a6c7ca2cebf9412 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:59:41,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:59:41,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:59:41,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:59:41,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:59:41,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:59:41,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:59:41,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:59:41,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:59:41,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:59:41,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:59:41,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:59:41,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:59:41,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:59:41,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:59:41,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:59:41,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:59:41,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:59:41,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:59:41,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:59:41,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:59:41,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:59:41,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:59:41,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:59:41,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:59:41,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:59:41,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:59:41,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:59:41,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:59:41,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:59:41,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:59:41,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:59:41,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:59:41,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:59:41,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:59:41,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:59:41,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:59:41,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:59:41,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:59:41,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:59:41,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:59:41,862 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 04:59:41,895 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:59:41,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:59:41,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:59:41,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:59:41,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:59:41,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:59:41,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:59:41,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:59:41,898 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:59:41,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:59:41,899 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:59:41,899 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:59:41,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:59:41,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:59:41,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:59:41,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 04:59:41,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:59:41,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 04:59:41,901 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 04:59:41,901 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:59:41,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 04:59:41,901 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:59:41,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 04:59:41,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:59:41,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:59:41,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:59:41,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:59:41,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:59:41,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:59:41,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 04:59:41,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:59:41,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:59:41,904 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:59:41,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 04:59:41,904 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:59:41,904 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:59:41,904 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:59:41,905 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c0827ac193c1e2b03d5ccf1e60b62c7d6ff1b4feade2c409a6c7ca2cebf9412 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:59:42,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:59:42,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:59:42,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:59:42,257 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:59:42,257 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:59:42,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i [2023-09-01 04:59:43,452 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:59:43,732 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:59:43,733 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i [2023-09-01 04:59:43,745 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/151f6db80/40040d795b2143ecb921534cbcbaf1fd/FLAG47946716c [2023-09-01 04:59:43,756 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/151f6db80/40040d795b2143ecb921534cbcbaf1fd [2023-09-01 04:59:43,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:59:43,758 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:59:43,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:59:43,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:59:43,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:59:43,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:59:43" (1/1) ... [2023-09-01 04:59:43,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11fb911c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:59:43, skipping insertion in model container [2023-09-01 04:59:43,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:59:43" (1/1) ... [2023-09-01 04:59:43,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:59:43,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:59:44,191 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/26_stack_cas_longest-1.i[31167,31180] [2023-09-01 04:59:44,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:59:44,216 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:59:44,300 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/26_stack_cas_longest-1.i[31167,31180] [2023-09-01 04:59:44,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:59:44,373 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:59:44,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:59:44 WrapperNode [2023-09-01 04:59:44,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:59:44,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:59:44,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:59:44,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:59:44,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:59:44" (1/1) ... [2023-09-01 04:59:44,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:59:44" (1/1) ... [2023-09-01 04:59:44,441 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 198 [2023-09-01 04:59:44,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:59:44,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:59:44,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:59:44,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:59:44,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:59:44" (1/1) ... [2023-09-01 04:59:44,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:59:44" (1/1) ... [2023-09-01 04:59:44,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:59:44" (1/1) ... [2023-09-01 04:59:44,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:59:44" (1/1) ... [2023-09-01 04:59:44,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:59:44" (1/1) ... [2023-09-01 04:59:44,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:59:44" (1/1) ... [2023-09-01 04:59:44,480 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:59:44" (1/1) ... [2023-09-01 04:59:44,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:59:44" (1/1) ... [2023-09-01 04:59:44,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:59:44,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:59:44,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:59:44,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:59:44,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:59:44" (1/1) ... [2023-09-01 04:59:44,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:59:44,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:59:44,525 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) [2023-09-01 04:59:44,548 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 [2023-09-01 04:59:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 04:59:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-09-01 04:59:44,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-09-01 04:59:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 04:59:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:59:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:59:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:59:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 04:59:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:59:44,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:59:44,569 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 04:59:44,743 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:59:44,745 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:59:45,033 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:59:45,175 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:59:45,175 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 04:59:45,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:59:45 BoogieIcfgContainer [2023-09-01 04:59:45,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:59:45,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:59:45,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:59:45,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:59:45,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:59:43" (1/3) ... [2023-09-01 04:59:45,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188b59cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:59:45, skipping insertion in model container [2023-09-01 04:59:45,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:59:44" (2/3) ... [2023-09-01 04:59:45,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188b59cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:59:45, skipping insertion in model container [2023-09-01 04:59:45,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:59:45" (3/3) ... [2023-09-01 04:59:45,185 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-1.i [2023-09-01 04:59:45,193 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 04:59:45,200 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:59:45,200 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 04:59:45,201 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:59:45,288 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:45,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 133 transitions, 271 flow [2023-09-01 04:59:45,373 INFO L130 PetriNetUnfolder]: 11/143 cut-off events. [2023-09-01 04:59:45,374 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:59:45,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 143 events. 11/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2023-09-01 04:59:45,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 133 transitions, 271 flow [2023-09-01 04:59:45,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 133 transitions, 271 flow [2023-09-01 04:59:45,387 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:45,396 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 133 transitions, 271 flow [2023-09-01 04:59:45,398 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 133 transitions, 271 flow [2023-09-01 04:59:45,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 133 transitions, 271 flow [2023-09-01 04:59:45,431 INFO L130 PetriNetUnfolder]: 11/143 cut-off events. [2023-09-01 04:59:45,431 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:59:45,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 143 events. 11/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2023-09-01 04:59:45,435 INFO L119 LiptonReduction]: Number of co-enabled transitions 2522 [2023-09-01 04:59:50,089 INFO L134 LiptonReduction]: Checked pairs total: 3076 [2023-09-01 04:59:50,090 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-09-01 04:59:50,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:59:50,107 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:59:50,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:59:50,112 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-09-01 04:59:50,112 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:59:50,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:59:50,113 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 04:59:50,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:59:50,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:59:50,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1550590541, now seen corresponding path program 1 times [2023-09-01 04:59:50,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:59:50,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065573965] [2023-09-01 04:59:50,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:59:50,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:59:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:50,224 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:59:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:50,257 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:59:50,258 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:59:50,259 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:59:50,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 04:59:50,261 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:59:50,263 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:59:50,264 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:59:50,264 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 04:59:50,307 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:50,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 474 flow [2023-09-01 04:59:50,376 INFO L130 PetriNetUnfolder]: 21/253 cut-off events. [2023-09-01 04:59:50,377 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:59:50,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 253 events. 21/253 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 535 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 206. Up to 6 conditions per place. [2023-09-01 04:59:50,382 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 231 transitions, 474 flow [2023-09-01 04:59:50,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 231 transitions, 474 flow [2023-09-01 04:59:50,384 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:50,384 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 231 transitions, 474 flow [2023-09-01 04:59:50,385 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 231 transitions, 474 flow [2023-09-01 04:59:50,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 474 flow [2023-09-01 04:59:50,418 INFO L130 PetriNetUnfolder]: 21/253 cut-off events. [2023-09-01 04:59:50,418 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:59:50,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 253 events. 21/253 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 535 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 206. Up to 6 conditions per place. [2023-09-01 04:59:50,431 INFO L119 LiptonReduction]: Number of co-enabled transitions 24056 [2023-09-01 04:59:55,232 INFO L134 LiptonReduction]: Checked pairs total: 65438 [2023-09-01 04:59:55,233 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-09-01 04:59:55,235 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:59:55,236 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:59:55,236 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:59:55,240 INFO L130 PetriNetUnfolder]: 3/31 cut-off events. [2023-09-01 04:59:55,240 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:59:55,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:59:55,240 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 04:59:55,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:59:55,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:59:55,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1068023603, now seen corresponding path program 1 times [2023-09-01 04:59:55,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:59:55,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602938074] [2023-09-01 04:59:55,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:59:55,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:59:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:55,263 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:59:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:55,283 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:59:55,284 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:59:55,284 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:59:55,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 04:59:55,284 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:59:55,285 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:59:55,285 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:59:55,285 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 04:59:55,333 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:55,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 329 transitions, 679 flow [2023-09-01 04:59:55,389 INFO L130 PetriNetUnfolder]: 31/363 cut-off events. [2023-09-01 04:59:55,390 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 04:59:55,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 363 events. 31/363 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1085 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 303. Up to 8 conditions per place. [2023-09-01 04:59:55,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 329 transitions, 679 flow [2023-09-01 04:59:55,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 308 places, 329 transitions, 679 flow [2023-09-01 04:59:55,403 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:55,404 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 308 places, 329 transitions, 679 flow [2023-09-01 04:59:55,404 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 308 places, 329 transitions, 679 flow [2023-09-01 04:59:55,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 329 transitions, 679 flow [2023-09-01 04:59:55,469 INFO L130 PetriNetUnfolder]: 31/363 cut-off events. [2023-09-01 04:59:55,469 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 04:59:55,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 363 events. 31/363 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1085 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 303. Up to 8 conditions per place. [2023-09-01 04:59:55,494 INFO L119 LiptonReduction]: Number of co-enabled transitions 64602 [2023-09-01 05:00:01,407 INFO L134 LiptonReduction]: Checked pairs total: 172575 [2023-09-01 05:00:01,409 INFO L136 LiptonReduction]: Total number of compositions: 247 [2023-09-01 05:00:01,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:01,416 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:01,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:01,422 INFO L130 PetriNetUnfolder]: 4/54 cut-off events. [2023-09-01 05:00:01,422 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 05:00:01,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:01,422 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 05:00:01,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:01,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:01,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1213916751, now seen corresponding path program 1 times [2023-09-01 05:00:01,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:01,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604602365] [2023-09-01 05:00:01,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:01,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:01,479 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:01,508 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:01,509 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:01,509 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:01,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 05:00:01,510 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:01,510 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:01,511 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:01,511 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 05:00:01,576 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:01,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 427 transitions, 886 flow [2023-09-01 05:00:01,701 INFO L130 PetriNetUnfolder]: 41/473 cut-off events. [2023-09-01 05:00:01,701 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 05:00:01,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 473 events. 41/473 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1679 event pairs, 0 based on Foata normal form. 0/387 useless extension candidates. Maximal degree in co-relation 400. Up to 10 conditions per place. [2023-09-01 05:00:01,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 399 places, 427 transitions, 886 flow [2023-09-01 05:00:01,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 399 places, 427 transitions, 886 flow [2023-09-01 05:00:01,716 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:01,716 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 399 places, 427 transitions, 886 flow [2023-09-01 05:00:01,716 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 399 places, 427 transitions, 886 flow [2023-09-01 05:00:01,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 427 transitions, 886 flow [2023-09-01 05:00:01,805 INFO L130 PetriNetUnfolder]: 41/473 cut-off events. [2023-09-01 05:00:01,805 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 05:00:01,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 473 events. 41/473 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1679 event pairs, 0 based on Foata normal form. 0/387 useless extension candidates. Maximal degree in co-relation 400. Up to 10 conditions per place. [2023-09-01 05:00:01,844 INFO L119 LiptonReduction]: Number of co-enabled transitions 124160 [2023-09-01 05:00:09,597 INFO L134 LiptonReduction]: Checked pairs total: 353281 [2023-09-01 05:00:09,598 INFO L136 LiptonReduction]: Total number of compositions: 325 [2023-09-01 05:00:09,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:09,600 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:09,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:09,609 INFO L130 PetriNetUnfolder]: 8/99 cut-off events. [2023-09-01 05:00:09,609 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 05:00:09,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:09,610 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 05:00:09,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:09,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:09,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1783804678, now seen corresponding path program 1 times [2023-09-01 05:00:09,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:09,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205176045] [2023-09-01 05:00:09,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:09,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:09,637 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:09,658 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:09,659 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:09,659 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:09,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 05:00:09,659 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:09,660 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:09,660 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:09,660 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 05:00:09,720 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:09,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 490 places, 525 transitions, 1095 flow [2023-09-01 05:00:09,850 INFO L130 PetriNetUnfolder]: 51/583 cut-off events. [2023-09-01 05:00:09,851 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 05:00:09,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 583 events. 51/583 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2296 event pairs, 0 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 497. Up to 12 conditions per place. [2023-09-01 05:00:09,864 INFO L82 GeneralOperation]: Start removeDead. Operand has 490 places, 525 transitions, 1095 flow [2023-09-01 05:00:09,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 490 places, 525 transitions, 1095 flow [2023-09-01 05:00:09,871 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:09,871 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 490 places, 525 transitions, 1095 flow [2023-09-01 05:00:09,872 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 490 places, 525 transitions, 1095 flow [2023-09-01 05:00:09,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 490 places, 525 transitions, 1095 flow [2023-09-01 05:00:09,996 INFO L130 PetriNetUnfolder]: 51/583 cut-off events. [2023-09-01 05:00:09,996 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 05:00:10,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 583 events. 51/583 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2296 event pairs, 0 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 497. Up to 12 conditions per place. [2023-09-01 05:00:10,049 INFO L119 LiptonReduction]: Number of co-enabled transitions 202730 [2023-09-01 05:00:19,170 INFO L134 LiptonReduction]: Checked pairs total: 577123 [2023-09-01 05:00:19,170 INFO L136 LiptonReduction]: Total number of compositions: 402 [2023-09-01 05:00:19,172 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:19,172 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:19,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:19,186 INFO L130 PetriNetUnfolder]: 16/150 cut-off events. [2023-09-01 05:00:19,187 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 05:00:19,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:19,188 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:00:19,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:19,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:19,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1335391351, now seen corresponding path program 1 times [2023-09-01 05:00:19,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:19,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684962376] [2023-09-01 05:00:19,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:19,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:19,236 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:19,257 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:19,257 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:19,257 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:19,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 05:00:19,258 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:19,258 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:19,259 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:19,259 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 05:00:19,334 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:19,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 581 places, 623 transitions, 1306 flow [2023-09-01 05:00:19,504 INFO L130 PetriNetUnfolder]: 61/693 cut-off events. [2023-09-01 05:00:19,504 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 05:00:19,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 693 events. 61/693 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2979 event pairs, 0 based on Foata normal form. 0/565 useless extension candidates. Maximal degree in co-relation 602. Up to 14 conditions per place. [2023-09-01 05:00:19,524 INFO L82 GeneralOperation]: Start removeDead. Operand has 581 places, 623 transitions, 1306 flow [2023-09-01 05:00:19,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 581 places, 623 transitions, 1306 flow [2023-09-01 05:00:19,530 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:19,531 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 581 places, 623 transitions, 1306 flow [2023-09-01 05:00:19,531 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 581 places, 623 transitions, 1306 flow [2023-09-01 05:00:19,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 581 places, 623 transitions, 1306 flow [2023-09-01 05:00:19,747 INFO L130 PetriNetUnfolder]: 61/693 cut-off events. [2023-09-01 05:00:19,748 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 05:00:19,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 693 events. 61/693 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2979 event pairs, 0 based on Foata normal form. 0/565 useless extension candidates. Maximal degree in co-relation 602. Up to 14 conditions per place. [2023-09-01 05:00:19,832 INFO L119 LiptonReduction]: Number of co-enabled transitions 300312 [2023-09-01 05:00:30,307 INFO L134 LiptonReduction]: Checked pairs total: 873712 [2023-09-01 05:00:30,308 INFO L136 LiptonReduction]: Total number of compositions: 477 [2023-09-01 05:00:30,309 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:30,310 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:30,310 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:30,332 INFO L130 PetriNetUnfolder]: 22/199 cut-off events. [2023-09-01 05:00:30,333 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 05:00:30,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:30,333 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:00:30,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:30,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:30,334 INFO L85 PathProgramCache]: Analyzing trace with hash -13033532, now seen corresponding path program 1 times [2023-09-01 05:00:30,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:30,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969677439] [2023-09-01 05:00:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:30,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:30,392 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:30,423 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:30,426 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:30,426 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:30,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 05:00:30,426 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:30,428 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:30,428 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:30,428 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 05:00:30,515 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:30,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 672 places, 721 transitions, 1519 flow [2023-09-01 05:00:30,729 INFO L130 PetriNetUnfolder]: 71/803 cut-off events. [2023-09-01 05:00:30,729 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 05:00:30,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 803 events. 71/803 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3649 event pairs, 0 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 719. Up to 16 conditions per place. [2023-09-01 05:00:30,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 672 places, 721 transitions, 1519 flow [2023-09-01 05:00:30,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 672 places, 721 transitions, 1519 flow [2023-09-01 05:00:30,757 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:30,757 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 672 places, 721 transitions, 1519 flow [2023-09-01 05:00:30,758 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 672 places, 721 transitions, 1519 flow [2023-09-01 05:00:30,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 672 places, 721 transitions, 1519 flow [2023-09-01 05:00:30,962 INFO L130 PetriNetUnfolder]: 71/803 cut-off events. [2023-09-01 05:00:30,962 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 05:00:30,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 803 events. 71/803 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3649 event pairs, 0 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 719. Up to 16 conditions per place. [2023-09-01 05:00:31,036 INFO L119 LiptonReduction]: Number of co-enabled transitions 416906 [2023-09-01 05:00:42,902 INFO L134 LiptonReduction]: Checked pairs total: 1191750 [2023-09-01 05:00:42,903 INFO L136 LiptonReduction]: Total number of compositions: 550 [2023-09-01 05:00:42,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:42,908 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:42,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:42,935 INFO L130 PetriNetUnfolder]: 30/250 cut-off events. [2023-09-01 05:00:42,936 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 05:00:42,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:42,936 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:00:42,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:42,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:42,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1927094219, now seen corresponding path program 1 times [2023-09-01 05:00:42,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:42,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999595702] [2023-09-01 05:00:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:42,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:42,989 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:43,013 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:43,013 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:43,013 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:43,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 05:00:43,014 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:43,014 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:43,014 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:43,014 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 05:00:43,109 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:43,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 763 places, 819 transitions, 1734 flow [2023-09-01 05:00:43,394 INFO L130 PetriNetUnfolder]: 81/913 cut-off events. [2023-09-01 05:00:43,394 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 05:00:43,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 913 events. 81/913 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4325 event pairs, 0 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 837. Up to 18 conditions per place. [2023-09-01 05:00:43,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 763 places, 819 transitions, 1734 flow [2023-09-01 05:00:43,440 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 763 places, 819 transitions, 1734 flow [2023-09-01 05:00:43,440 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:43,441 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 763 places, 819 transitions, 1734 flow [2023-09-01 05:00:43,441 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 763 places, 819 transitions, 1734 flow [2023-09-01 05:00:43,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 763 places, 819 transitions, 1734 flow [2023-09-01 05:00:43,686 INFO L130 PetriNetUnfolder]: 81/913 cut-off events. [2023-09-01 05:00:43,687 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 05:00:43,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 913 events. 81/913 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4325 event pairs, 0 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 837. Up to 18 conditions per place. [2023-09-01 05:00:43,880 INFO L119 LiptonReduction]: Number of co-enabled transitions 552512 [2023-09-01 05:00:57,641 INFO L134 LiptonReduction]: Checked pairs total: 1608532 [2023-09-01 05:00:57,642 INFO L136 LiptonReduction]: Total number of compositions: 624 [2023-09-01 05:00:57,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:57,647 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:57,647 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:57,689 INFO L130 PetriNetUnfolder]: 37/305 cut-off events. [2023-09-01 05:00:57,689 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 05:00:57,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:57,690 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:00:57,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:57,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:57,690 INFO L85 PathProgramCache]: Analyzing trace with hash 84623084, now seen corresponding path program 1 times [2023-09-01 05:00:57,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:57,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031119338] [2023-09-01 05:00:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:57,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:57,740 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:57,772 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:57,772 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:57,773 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:57,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 05:00:57,774 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:57,775 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:57,776 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:57,777 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 05:00:57,883 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:57,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 854 places, 917 transitions, 1951 flow [2023-09-01 05:00:58,239 INFO L130 PetriNetUnfolder]: 91/1023 cut-off events. [2023-09-01 05:00:58,239 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 05:00:58,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 1023 events. 91/1023 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5059 event pairs, 0 based on Foata normal form. 0/832 useless extension candidates. Maximal degree in co-relation 956. Up to 20 conditions per place. [2023-09-01 05:00:58,279 INFO L82 GeneralOperation]: Start removeDead. Operand has 854 places, 917 transitions, 1951 flow [2023-09-01 05:00:58,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 854 places, 917 transitions, 1951 flow [2023-09-01 05:00:58,293 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:58,293 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 854 places, 917 transitions, 1951 flow [2023-09-01 05:00:58,293 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 854 places, 917 transitions, 1951 flow [2023-09-01 05:00:58,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 854 places, 917 transitions, 1951 flow [2023-09-01 05:00:58,650 INFO L130 PetriNetUnfolder]: 91/1023 cut-off events. [2023-09-01 05:00:58,650 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 05:00:58,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 1023 events. 91/1023 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5059 event pairs, 0 based on Foata normal form. 0/832 useless extension candidates. Maximal degree in co-relation 956. Up to 20 conditions per place. [2023-09-01 05:00:58,811 INFO L119 LiptonReduction]: Number of co-enabled transitions 707130 [2023-09-01 05:01:14,485 INFO L134 LiptonReduction]: Checked pairs total: 2282311 [2023-09-01 05:01:14,486 INFO L136 LiptonReduction]: Total number of compositions: 704 [2023-09-01 05:01:14,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:01:14,491 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:01:14,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:01:14,535 INFO L130 PetriNetUnfolder]: 44/351 cut-off events. [2023-09-01 05:01:14,535 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 05:01:14,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:01:14,536 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:01:14,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:01:14,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:01:14,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1043776736, now seen corresponding path program 1 times [2023-09-01 05:01:14,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:01:14,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416449151] [2023-09-01 05:01:14,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:01:14,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:01:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:14,566 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:01:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:14,589 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:01:14,590 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:01:14,590 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:01:14,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 05:01:14,590 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:01:14,591 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:01:14,591 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:01:14,591 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 05:01:14,712 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:01:14,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 945 places, 1015 transitions, 2170 flow [2023-09-01 05:01:15,241 INFO L130 PetriNetUnfolder]: 101/1133 cut-off events. [2023-09-01 05:01:15,241 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 05:01:15,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 1133 events. 101/1133 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5728 event pairs, 0 based on Foata normal form. 0/921 useless extension candidates. Maximal degree in co-relation 1076. Up to 22 conditions per place. [2023-09-01 05:01:15,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 945 places, 1015 transitions, 2170 flow [2023-09-01 05:01:15,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 945 places, 1015 transitions, 2170 flow [2023-09-01 05:01:15,294 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:01:15,294 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 945 places, 1015 transitions, 2170 flow [2023-09-01 05:01:15,294 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 945 places, 1015 transitions, 2170 flow [2023-09-01 05:01:15,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 945 places, 1015 transitions, 2170 flow [2023-09-01 05:01:15,720 INFO L130 PetriNetUnfolder]: 101/1133 cut-off events. [2023-09-01 05:01:15,720 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 05:01:15,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 1133 events. 101/1133 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5728 event pairs, 0 based on Foata normal form. 0/921 useless extension candidates. Maximal degree in co-relation 1076. Up to 22 conditions per place. [2023-09-01 05:01:15,861 INFO L119 LiptonReduction]: Number of co-enabled transitions 880760 [2023-09-01 05:01:33,372 INFO L134 LiptonReduction]: Checked pairs total: 2566361 [2023-09-01 05:01:33,372 INFO L136 LiptonReduction]: Total number of compositions: 776 [2023-09-01 05:01:33,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:01:33,375 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:01:33,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:01:33,424 INFO L130 PetriNetUnfolder]: 51/402 cut-off events. [2023-09-01 05:01:33,425 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 05:01:33,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:01:33,425 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:01:33,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:01:33,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:01:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1380839406, now seen corresponding path program 1 times [2023-09-01 05:01:33,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:01:33,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389829098] [2023-09-01 05:01:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:01:33,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:01:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:33,474 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:01:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:33,513 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:01:33,513 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:01:33,513 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:01:33,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 05:01:33,514 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:01:33,514 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:01:33,515 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:01:33,515 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 05:01:33,653 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:01:33,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1036 places, 1113 transitions, 2391 flow [2023-09-01 05:01:34,189 INFO L130 PetriNetUnfolder]: 111/1243 cut-off events. [2023-09-01 05:01:34,189 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 05:01:34,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 1243 events. 111/1243 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 6400 event pairs, 0 based on Foata normal form. 0/1010 useless extension candidates. Maximal degree in co-relation 1199. Up to 24 conditions per place. [2023-09-01 05:01:34,229 INFO L82 GeneralOperation]: Start removeDead. Operand has 1036 places, 1113 transitions, 2391 flow [2023-09-01 05:01:34,240 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1036 places, 1113 transitions, 2391 flow [2023-09-01 05:01:34,240 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:01:34,240 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1036 places, 1113 transitions, 2391 flow [2023-09-01 05:01:34,241 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1036 places, 1113 transitions, 2391 flow [2023-09-01 05:01:34,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1036 places, 1113 transitions, 2391 flow [2023-09-01 05:01:34,682 INFO L130 PetriNetUnfolder]: 111/1243 cut-off events. [2023-09-01 05:01:34,682 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 05:01:34,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 1243 events. 111/1243 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 6400 event pairs, 0 based on Foata normal form. 0/1010 useless extension candidates. Maximal degree in co-relation 1199. Up to 24 conditions per place. [2023-09-01 05:01:34,896 INFO L119 LiptonReduction]: Number of co-enabled transitions 1073402 [2023-09-01 05:01:54,531 INFO L134 LiptonReduction]: Checked pairs total: 3507382 [2023-09-01 05:01:54,531 INFO L136 LiptonReduction]: Total number of compositions: 849 [2023-09-01 05:01:54,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:01:54,533 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:01:54,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:01:54,597 INFO L130 PetriNetUnfolder]: 58/455 cut-off events. [2023-09-01 05:01:54,598 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 05:01:54,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:01:54,598 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:01:54,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:01:54,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:01:54,598 INFO L85 PathProgramCache]: Analyzing trace with hash -361810310, now seen corresponding path program 1 times [2023-09-01 05:01:54,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:01:54,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891021044] [2023-09-01 05:01:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:01:54,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:01:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:54,640 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:01:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:54,674 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:01:54,675 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:01:54,675 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:01:54,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 05:01:54,675 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:01:54,676 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:01:54,677 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:01:54,677 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 05:01:54,802 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:01:54,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:01:55,313 INFO L130 PetriNetUnfolder]: 121/1353 cut-off events. [2023-09-01 05:01:55,313 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 05:01:55,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1468 conditions, 1353 events. 121/1353 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 7070 event pairs, 0 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 1323. Up to 26 conditions per place. [2023-09-01 05:01:55,391 INFO L82 GeneralOperation]: Start removeDead. Operand has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:01:55,427 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:01:55,427 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:01:55,427 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:01:55,427 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:01:55,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:01:55,979 INFO L130 PetriNetUnfolder]: 121/1353 cut-off events. [2023-09-01 05:01:55,980 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 05:01:56,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1468 conditions, 1353 events. 121/1353 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 7070 event pairs, 0 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 1323. Up to 26 conditions per place. [2023-09-01 05:01:56,181 INFO L119 LiptonReduction]: Number of co-enabled transitions 1285056 [2023-09-01 05:02:17,391 INFO L134 LiptonReduction]: Checked pairs total: 4170663 [2023-09-01 05:02:17,391 INFO L136 LiptonReduction]: Total number of compositions: 919 [2023-09-01 05:02:17,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:02:17,393 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:02:17,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:02:17,460 INFO L130 PetriNetUnfolder]: 64/499 cut-off events. [2023-09-01 05:02:17,461 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 05:02:17,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:02:17,461 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:02:17,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:02:17,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:02:17,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1008849469, now seen corresponding path program 1 times [2023-09-01 05:02:17,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:02:17,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369682947] [2023-09-01 05:02:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:02:17,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:02:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:02:17,489 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:02:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:02:17,522 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:02:17,522 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:02:17,522 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:02:17,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 05:02:17,523 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:02:17,525 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:02:17,526 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:02:17,526 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 05:02:17,674 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:02:17,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:02:18,260 INFO L130 PetriNetUnfolder]: 131/1463 cut-off events. [2023-09-01 05:02:18,260 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 05:02:18,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 1463 events. 131/1463 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 7779 event pairs, 0 based on Foata normal form. 0/1188 useless extension candidates. Maximal degree in co-relation 1448. Up to 28 conditions per place. [2023-09-01 05:02:18,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:02:18,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:02:18,334 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:02:18,334 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:02:18,335 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:02:18,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:02:18,845 INFO L130 PetriNetUnfolder]: 131/1463 cut-off events. [2023-09-01 05:02:18,846 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 05:02:18,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 1463 events. 131/1463 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 7779 event pairs, 0 based on Foata normal form. 0/1188 useless extension candidates. Maximal degree in co-relation 1448. Up to 28 conditions per place. [2023-09-01 05:02:19,165 INFO L119 LiptonReduction]: Number of co-enabled transitions 1515722 [2023-09-01 05:02:41,571 INFO L134 LiptonReduction]: Checked pairs total: 4415961 [2023-09-01 05:02:41,571 INFO L136 LiptonReduction]: Total number of compositions: 980 [2023-09-01 05:02:41,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:02:41,573 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:02:41,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:02:41,661 INFO L130 PetriNetUnfolder]: 72/553 cut-off events. [2023-09-01 05:02:41,661 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 05:02:41,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:02:41,662 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:02:41,662 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:02:41,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:02:41,662 INFO L85 PathProgramCache]: Analyzing trace with hash -357850694, now seen corresponding path program 1 times [2023-09-01 05:02:41,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:02:41,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955843667] [2023-09-01 05:02:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:02:41,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:02:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:02:41,693 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:02:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:02:41,724 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:02:41,724 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:02:41,724 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:02:41,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 05:02:41,725 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:02:41,725 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:02:41,725 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:02:41,725 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 05:02:41,871 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:02:41,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:02:42,620 INFO L130 PetriNetUnfolder]: 141/1573 cut-off events. [2023-09-01 05:02:42,621 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:02:42,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1721 conditions, 1573 events. 141/1573 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 8445 event pairs, 0 based on Foata normal form. 0/1277 useless extension candidates. Maximal degree in co-relation 1574. Up to 30 conditions per place. [2023-09-01 05:02:42,688 INFO L82 GeneralOperation]: Start removeDead. Operand has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:02:42,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:02:42,703 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:02:42,703 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:02:42,703 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:02:42,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:02:43,262 INFO L130 PetriNetUnfolder]: 141/1573 cut-off events. [2023-09-01 05:02:43,262 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:02:43,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1721 conditions, 1573 events. 141/1573 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 8445 event pairs, 0 based on Foata normal form. 0/1277 useless extension candidates. Maximal degree in co-relation 1574. Up to 30 conditions per place. [2023-09-01 05:02:43,636 INFO L119 LiptonReduction]: Number of co-enabled transitions 1765400 [2023-09-01 05:03:08,727 INFO L134 LiptonReduction]: Checked pairs total: 5183324 [2023-09-01 05:03:08,727 INFO L136 LiptonReduction]: Total number of compositions: 1068 [2023-09-01 05:03:08,729 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:03:08,730 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:03:08,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:03:08,826 INFO L130 PetriNetUnfolder]: 78/608 cut-off events. [2023-09-01 05:03:08,827 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:03:08,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:03:08,827 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:03:08,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:03:08,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:03:08,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1878621585, now seen corresponding path program 1 times [2023-09-01 05:03:08,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:03:08,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67963870] [2023-09-01 05:03:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:03:08,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:03:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:03:08,857 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:03:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:03:08,888 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:03:08,889 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:03:08,889 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:03:08,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 05:03:08,889 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:03:08,890 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:03:08,890 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:03:08,890 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-09-01 05:03:09,049 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:03:09,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:03:09,755 INFO L130 PetriNetUnfolder]: 151/1683 cut-off events. [2023-09-01 05:03:09,755 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:03:09,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 1683 events. 151/1683 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9142 event pairs, 0 based on Foata normal form. 0/1366 useless extension candidates. Maximal degree in co-relation 1701. Up to 32 conditions per place. [2023-09-01 05:03:09,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:03:09,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:03:09,872 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:03:09,872 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:03:09,873 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:03:09,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:03:10,589 INFO L130 PetriNetUnfolder]: 151/1683 cut-off events. [2023-09-01 05:03:10,589 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:03:10,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 1683 events. 151/1683 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9142 event pairs, 0 based on Foata normal form. 0/1366 useless extension candidates. Maximal degree in co-relation 1701. Up to 32 conditions per place. [2023-09-01 05:03:10,929 INFO L119 LiptonReduction]: Number of co-enabled transitions 2034090 [2023-09-01 05:03:38,346 INFO L134 LiptonReduction]: Checked pairs total: 6592358 [2023-09-01 05:03:38,346 INFO L136 LiptonReduction]: Total number of compositions: 1137 [2023-09-01 05:03:38,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:03:38,349 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:03:38,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:03:38,517 INFO L130 PetriNetUnfolder]: 85/652 cut-off events. [2023-09-01 05:03:38,518 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:03:38,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:03:38,518 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:03:38,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:03:38,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:03:38,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1862721328, now seen corresponding path program 1 times [2023-09-01 05:03:38,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:03:38,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178932520] [2023-09-01 05:03:38,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:03:38,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:03:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:03:38,548 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:03:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:03:38,582 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:03:38,583 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:03:38,583 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:03:38,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 05:03:38,583 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:03:38,583 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:03:38,584 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:03:38,584 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-09-01 05:03:38,741 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:03:38,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:03:39,514 INFO L130 PetriNetUnfolder]: 161/1793 cut-off events. [2023-09-01 05:03:39,514 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:03:39,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 1793 events. 161/1793 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9844 event pairs, 0 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 1829. Up to 34 conditions per place. [2023-09-01 05:03:39,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:03:39,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:03:39,676 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:03:39,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:03:39,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:03:39,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:03:40,441 INFO L130 PetriNetUnfolder]: 161/1793 cut-off events. [2023-09-01 05:03:40,441 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:03:40,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 1793 events. 161/1793 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9844 event pairs, 0 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 1829. Up to 34 conditions per place. [2023-09-01 05:03:40,914 INFO L119 LiptonReduction]: Number of co-enabled transitions 2321792 [2023-09-01 05:04:10,112 INFO L134 LiptonReduction]: Checked pairs total: 7579547 [2023-09-01 05:04:10,112 INFO L136 LiptonReduction]: Total number of compositions: 1222 [2023-09-01 05:04:10,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:04:10,116 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:04:10,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:04:10,242 INFO L130 PetriNetUnfolder]: 92/705 cut-off events. [2023-09-01 05:04:10,242 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:04:10,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:04:10,243 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:04:10,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:04:10,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:04:10,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1636104487, now seen corresponding path program 1 times [2023-09-01 05:04:10,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:04:10,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400524987] [2023-09-01 05:04:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:04:10,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:04:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:04:10,281 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:04:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:04:10,315 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:04:10,316 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:04:10,316 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:04:10,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 05:04:10,316 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:04:10,317 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:04:10,317 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:04:10,317 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-09-01 05:04:10,561 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:04:10,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:04:11,562 INFO L130 PetriNetUnfolder]: 171/1903 cut-off events. [2023-09-01 05:04:11,563 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:04:11,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2108 conditions, 1903 events. 171/1903 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 10500 event pairs, 0 based on Foata normal form. 0/1544 useless extension candidates. Maximal degree in co-relation 1958. Up to 36 conditions per place. [2023-09-01 05:04:11,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:04:11,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:04:11,743 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:04:11,743 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:04:11,743 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:04:11,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:04:12,631 INFO L130 PetriNetUnfolder]: 171/1903 cut-off events. [2023-09-01 05:04:12,632 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:04:12,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2108 conditions, 1903 events. 171/1903 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 10500 event pairs, 0 based on Foata normal form. 0/1544 useless extension candidates. Maximal degree in co-relation 1958. Up to 36 conditions per place. [2023-09-01 05:04:13,177 INFO L119 LiptonReduction]: Number of co-enabled transitions 2628506 [2023-09-01 05:04:45,357 INFO L134 LiptonReduction]: Checked pairs total: 8522192 [2023-09-01 05:04:45,357 INFO L136 LiptonReduction]: Total number of compositions: 1282 [2023-09-01 05:04:45,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:04:45,360 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:04:45,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:04:45,509 INFO L130 PetriNetUnfolder]: 100/762 cut-off events. [2023-09-01 05:04:45,509 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:04:45,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:04:45,510 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:04:45,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:04:45,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:04:45,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1746100533, now seen corresponding path program 1 times [2023-09-01 05:04:45,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:04:45,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925396777] [2023-09-01 05:04:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:04:45,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:04:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:04:45,558 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:04:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:04:45,593 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:04:45,593 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:04:45,594 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:04:45,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 05:04:45,594 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:04:45,594 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:04:45,594 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:04:45,595 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-09-01 05:04:45,759 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:04:45,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:04:46,919 INFO L130 PetriNetUnfolder]: 181/2013 cut-off events. [2023-09-01 05:04:46,919 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:04:47,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 2013 events. 181/2013 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11209 event pairs, 0 based on Foata normal form. 0/1633 useless extension candidates. Maximal degree in co-relation 2088. Up to 38 conditions per place. [2023-09-01 05:04:47,051 INFO L82 GeneralOperation]: Start removeDead. Operand has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:04:47,084 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:04:47,084 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:04:47,084 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:04:47,084 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:04:47,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:04:48,131 INFO L130 PetriNetUnfolder]: 181/2013 cut-off events. [2023-09-01 05:04:48,132 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:04:48,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 2013 events. 181/2013 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11209 event pairs, 0 based on Foata normal form. 0/1633 useless extension candidates. Maximal degree in co-relation 2088. Up to 38 conditions per place. [2023-09-01 05:04:48,719 INFO L119 LiptonReduction]: Number of co-enabled transitions 2954232 [2023-09-01 05:05:21,659 INFO L134 LiptonReduction]: Checked pairs total: 8571900 [2023-09-01 05:05:21,660 INFO L136 LiptonReduction]: Total number of compositions: 1351 [2023-09-01 05:05:21,662 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:05:21,662 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:05:21,662 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:05:21,843 INFO L130 PetriNetUnfolder]: 107/809 cut-off events. [2023-09-01 05:05:21,843 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:05:21,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:05:21,843 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:05:21,843 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:05:21,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:05:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash 596187427, now seen corresponding path program 1 times [2023-09-01 05:05:21,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:05:21,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482558329] [2023-09-01 05:05:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:05:21,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:05:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:05:21,890 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:05:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:05:21,930 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:05:21,932 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:05:21,932 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:05:21,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 05:05:21,932 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:05:21,933 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:05:21,933 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:05:21,933 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-09-01 05:05:22,135 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:05:22,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:05:23,637 INFO L130 PetriNetUnfolder]: 191/2123 cut-off events. [2023-09-01 05:05:23,637 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:05:23,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 2123 events. 191/2123 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11858 event pairs, 0 based on Foata normal form. 0/1722 useless extension candidates. Maximal degree in co-relation 2219. Up to 40 conditions per place. [2023-09-01 05:05:23,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:05:23,797 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:05:23,798 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:05:23,798 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:05:23,798 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:05:23,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:05:25,491 INFO L130 PetriNetUnfolder]: 191/2123 cut-off events. [2023-09-01 05:05:25,498 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:05:25,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 2123 events. 191/2123 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11858 event pairs, 0 based on Foata normal form. 0/1722 useless extension candidates. Maximal degree in co-relation 2219. Up to 40 conditions per place. [2023-09-01 05:05:26,363 INFO L119 LiptonReduction]: Number of co-enabled transitions 3298970 [2023-09-01 05:06:01,611 INFO L134 LiptonReduction]: Checked pairs total: 9540040 [2023-09-01 05:06:01,611 INFO L136 LiptonReduction]: Total number of compositions: 1435 [2023-09-01 05:06:01,613 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:06:01,613 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:06:01,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:06:01,796 INFO L130 PetriNetUnfolder]: 114/856 cut-off events. [2023-09-01 05:06:01,796 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:06:01,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:06:01,796 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:06:01,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:06:01,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:06:01,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1028835156, now seen corresponding path program 1 times [2023-09-01 05:06:01,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:06:01,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286526077] [2023-09-01 05:06:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:06:01,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:06:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:06:01,839 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:06:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:06:01,881 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:06:01,881 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:06:01,881 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:06:01,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 05:06:01,882 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:06:01,882 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:06:01,882 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:06:01,882 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-09-01 05:06:02,083 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:06:02,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:06:03,611 INFO L130 PetriNetUnfolder]: 201/2233 cut-off events. [2023-09-01 05:06:03,611 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:06:03,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2504 conditions, 2233 events. 201/2233 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 12565 event pairs, 0 based on Foata normal form. 0/1811 useless extension candidates. Maximal degree in co-relation 2351. Up to 42 conditions per place. [2023-09-01 05:06:03,752 INFO L82 GeneralOperation]: Start removeDead. Operand has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:06:03,783 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:06:03,783 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:06:03,783 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:06:03,783 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:06:03,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:06:05,362 INFO L130 PetriNetUnfolder]: 201/2233 cut-off events. [2023-09-01 05:06:05,363 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:06:05,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2504 conditions, 2233 events. 201/2233 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 12565 event pairs, 0 based on Foata normal form. 0/1811 useless extension candidates. Maximal degree in co-relation 2351. Up to 42 conditions per place. [2023-09-01 05:06:06,020 INFO L119 LiptonReduction]: Number of co-enabled transitions 3662720 [2023-09-01 05:06:44,171 INFO L134 LiptonReduction]: Checked pairs total: 11839149 [2023-09-01 05:06:44,171 INFO L136 LiptonReduction]: Total number of compositions: 1520 [2023-09-01 05:06:44,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:06:44,173 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:06:44,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:06:44,439 INFO L130 PetriNetUnfolder]: 120/906 cut-off events. [2023-09-01 05:06:44,440 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:06:44,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:06:44,440 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:06:44,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:06:44,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:06:44,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2093940908, now seen corresponding path program 1 times [2023-09-01 05:06:44,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:06:44,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252858225] [2023-09-01 05:06:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:06:44,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:06:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:06:44,486 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:06:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:06:44,535 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:06:44,537 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:06:44,537 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:06:44,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 05:06:44,537 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:06:44,538 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:06:44,538 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:06:44,538 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-09-01 05:06:44,737 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:06:44,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:06:46,407 INFO L130 PetriNetUnfolder]: 211/2343 cut-off events. [2023-09-01 05:06:46,408 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:06:46,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2638 conditions, 2343 events. 211/2343 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13237 event pairs, 0 based on Foata normal form. 0/1900 useless extension candidates. Maximal degree in co-relation 2484. Up to 44 conditions per place. [2023-09-01 05:06:46,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:06:46,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:06:46,616 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:06:46,616 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:06:46,616 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:06:46,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:06:48,198 INFO L130 PetriNetUnfolder]: 211/2343 cut-off events. [2023-09-01 05:06:48,198 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:06:48,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2638 conditions, 2343 events. 211/2343 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13237 event pairs, 0 based on Foata normal form. 0/1900 useless extension candidates. Maximal degree in co-relation 2484. Up to 44 conditions per place. [2023-09-01 05:06:49,064 INFO L119 LiptonReduction]: Number of co-enabled transitions 4045482 [2023-09-01 05:07:28,771 INFO L134 LiptonReduction]: Checked pairs total: 13079904 [2023-09-01 05:07:28,771 INFO L136 LiptonReduction]: Total number of compositions: 1577 [2023-09-01 05:07:28,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:07:28,773 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:07:28,773 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:07:29,049 INFO L130 PetriNetUnfolder]: 128/961 cut-off events. [2023-09-01 05:07:29,050 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:07:29,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:07:29,050 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:07:29,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:07:29,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:07:29,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1413707704, now seen corresponding path program 1 times [2023-09-01 05:07:29,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:07:29,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83813781] [2023-09-01 05:07:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:07:29,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:07:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:07:29,099 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:07:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:07:29,154 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:07:29,154 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:07:29,154 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:07:29,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 05:07:29,155 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:07:29,155 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:07:29,155 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:07:29,155 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-09-01 05:07:29,366 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:07:29,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:07:31,196 INFO L130 PetriNetUnfolder]: 221/2453 cut-off events. [2023-09-01 05:07:31,197 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:07:31,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 2453 events. 221/2453 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13918 event pairs, 0 based on Foata normal form. 0/1989 useless extension candidates. Maximal degree in co-relation 2618. Up to 46 conditions per place. [2023-09-01 05:07:31,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:07:31,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:07:31,436 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:07:31,437 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:07:31,437 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:07:31,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:07:33,233 INFO L130 PetriNetUnfolder]: 221/2453 cut-off events. [2023-09-01 05:07:33,233 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:07:33,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 2453 events. 221/2453 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13918 event pairs, 0 based on Foata normal form. 0/1989 useless extension candidates. Maximal degree in co-relation 2618. Up to 46 conditions per place. [2023-09-01 05:07:34,193 INFO L119 LiptonReduction]: Number of co-enabled transitions 4447256 [2023-09-01 05:08:16,539 INFO L134 LiptonReduction]: Checked pairs total: 14441192 [2023-09-01 05:08:16,539 INFO L136 LiptonReduction]: Total number of compositions: 1659 [2023-09-01 05:08:16,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:08:16,542 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:08:16,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:08:16,859 INFO L130 PetriNetUnfolder]: 135/1007 cut-off events. [2023-09-01 05:08:16,859 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:08:16,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:08:16,859 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:08:16,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:08:16,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:08:16,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1769364969, now seen corresponding path program 1 times [2023-09-01 05:08:16,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:08:16,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922911805] [2023-09-01 05:08:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:08:16,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:08:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:08:16,917 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:08:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:08:16,976 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:08:16,976 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:08:16,976 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:08:16,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 05:08:16,977 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:08:16,977 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:08:16,977 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:08:16,977 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-09-01 05:08:17,201 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:08:17,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:08:19,230 INFO L130 PetriNetUnfolder]: 231/2563 cut-off events. [2023-09-01 05:08:19,230 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:08:19,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2909 conditions, 2563 events. 231/2563 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 14576 event pairs, 0 based on Foata normal form. 0/2078 useless extension candidates. Maximal degree in co-relation 2753. Up to 48 conditions per place. [2023-09-01 05:08:19,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:08:19,472 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:08:19,472 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:08:19,472 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:08:19,473 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:08:19,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:08:21,416 INFO L130 PetriNetUnfolder]: 231/2563 cut-off events. [2023-09-01 05:08:21,416 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:08:21,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2909 conditions, 2563 events. 231/2563 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 14576 event pairs, 0 based on Foata normal form. 0/2078 useless extension candidates. Maximal degree in co-relation 2753. Up to 48 conditions per place. [2023-09-01 05:08:22,512 INFO L119 LiptonReduction]: Number of co-enabled transitions 4868042 [2023-09-01 05:09:07,400 INFO L134 LiptonReduction]: Checked pairs total: 15654079 [2023-09-01 05:09:07,400 INFO L136 LiptonReduction]: Total number of compositions: 1731 [2023-09-01 05:09:07,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:09:07,402 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:09:07,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:09:07,697 INFO L130 PetriNetUnfolder]: 141/1057 cut-off events. [2023-09-01 05:09:07,697 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:09:07,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:09:07,698 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:09:07,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:09:07,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:09:07,698 INFO L85 PathProgramCache]: Analyzing trace with hash -186076379, now seen corresponding path program 1 times [2023-09-01 05:09:07,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:09:07,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593510699] [2023-09-01 05:09:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:09:07,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:09:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:09:07,802 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:09:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:09:07,851 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:09:07,852 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:09:07,852 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:09:07,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 05:09:07,852 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:09:07,852 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:09:07,853 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:09:07,853 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-09-01 05:09:08,188 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:09:08,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:09:10,650 INFO L130 PetriNetUnfolder]: 241/2673 cut-off events. [2023-09-01 05:09:10,651 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 05:09:10,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3046 conditions, 2673 events. 241/2673 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15285 event pairs, 0 based on Foata normal form. 0/2167 useless extension candidates. Maximal degree in co-relation 2889. Up to 50 conditions per place. [2023-09-01 05:09:10,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:09:10,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:09:10,923 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:09:10,923 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:09:10,923 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:09:10,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:09:13,113 INFO L130 PetriNetUnfolder]: 241/2673 cut-off events. [2023-09-01 05:09:13,114 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 05:09:13,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3046 conditions, 2673 events. 241/2673 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15285 event pairs, 0 based on Foata normal form. 0/2167 useless extension candidates. Maximal degree in co-relation 2889. Up to 50 conditions per place. [2023-09-01 05:09:14,339 INFO L119 LiptonReduction]: Number of co-enabled transitions 5307840 [2023-09-01 05:10:00,883 INFO L134 LiptonReduction]: Checked pairs total: 15443251 [2023-09-01 05:10:00,883 INFO L136 LiptonReduction]: Total number of compositions: 1811 [2023-09-01 05:10:00,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:00,885 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:00,885 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:01,286 INFO L130 PetriNetUnfolder]: 149/1104 cut-off events. [2023-09-01 05:10:01,286 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 05:10:01,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:01,286 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:10:01,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:01,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:01,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2030743746, now seen corresponding path program 1 times [2023-09-01 05:10:01,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:01,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320912062] [2023-09-01 05:10:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:01,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:01,345 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:01,400 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:01,400 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:01,400 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:01,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 05:10:01,401 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:01,401 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:01,401 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:01,401 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-09-01 05:10:01,672 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:01,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:10:04,061 INFO L130 PetriNetUnfolder]: 251/2783 cut-off events. [2023-09-01 05:10:04,062 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 05:10:04,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3184 conditions, 2783 events. 251/2783 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15953 event pairs, 0 based on Foata normal form. 0/2256 useless extension candidates. Maximal degree in co-relation 3026. Up to 52 conditions per place. [2023-09-01 05:10:04,329 INFO L82 GeneralOperation]: Start removeDead. Operand has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:10:04,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:10:04,402 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:04,402 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:10:04,403 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:10:04,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:10:06,821 INFO L130 PetriNetUnfolder]: 251/2783 cut-off events. [2023-09-01 05:10:06,821 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 05:10:07,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3184 conditions, 2783 events. 251/2783 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15953 event pairs, 0 based on Foata normal form. 0/2256 useless extension candidates. Maximal degree in co-relation 3026. Up to 52 conditions per place. [2023-09-01 05:10:08,237 INFO L119 LiptonReduction]: Number of co-enabled transitions 5766650 [2023-09-01 05:10:58,179 INFO L134 LiptonReduction]: Checked pairs total: 16677977 [2023-09-01 05:10:58,180 INFO L136 LiptonReduction]: Total number of compositions: 1892 [2023-09-01 05:10:58,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:58,182 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=true, 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;@319b0bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:58,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:58,542 INFO L130 PetriNetUnfolder]: 155/1161 cut-off events. [2023-09-01 05:10:58,543 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 05:10:58,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:58,543 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:10:58,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:58,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1740100242, now seen corresponding path program 1 times [2023-09-01 05:10:58,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:58,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98308156] [2023-09-01 05:10:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:58,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:58,605 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:58,662 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:58,662 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:58,662 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:58,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 05:10:58,663 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:58,663 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:58,663 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:58,663 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-09-01 05:10:58,987 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:59,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2401 places, 2583 transitions, 5946 flow [2023-09-01 05:11:01,747 INFO L130 PetriNetUnfolder]: 261/2893 cut-off events. [2023-09-01 05:11:01,748 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 05:11:02,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3323 conditions, 2893 events. 261/2893 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 16612 event pairs, 0 based on Foata normal form. 0/2345 useless extension candidates. Maximal degree in co-relation 3164. Up to 54 conditions per place. [2023-09-01 05:11:02,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 2401 places, 2583 transitions, 5946 flow [2023-09-01 05:11:02,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2401 places, 2583 transitions, 5946 flow [2023-09-01 05:11:02,093 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:11:02,093 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2401 places, 2583 transitions, 5946 flow [2023-09-01 05:11:02,094 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2401 places, 2583 transitions, 5946 flow [2023-09-01 05:11:02,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2401 places, 2583 transitions, 5946 flow [2023-09-01 05:11:04,820 INFO L130 PetriNetUnfolder]: 261/2893 cut-off events. [2023-09-01 05:11:04,821 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 05:11:05,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3323 conditions, 2893 events. 261/2893 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 16612 event pairs, 0 based on Foata normal form. 0/2345 useless extension candidates. Maximal degree in co-relation 3164. Up to 54 conditions per place. [2023-09-01 05:11:06,128 INFO L119 LiptonReduction]: Number of co-enabled transitions 6244472 Killed by 15