./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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 ../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:20:29,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:20:29,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:20:29,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:20:29,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:20:29,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:20:29,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:20:29,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:20:29,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:20:29,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:20:29,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:20:29,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:20:29,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:20:29,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:20:30,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:20:30,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:20:30,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:20:30,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:20:30,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:20:30,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:20:30,013 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:20:30,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:20:30,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:20:30,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:20:30,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:20:30,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:20:30,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:20:30,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:20:30,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:20:30,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:20:30,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:20:30,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:20:30,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:20:30,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:20:30,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:20:30,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:20:30,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:20:30,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:20:30,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:20:30,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:20:30,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:20:30,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:20:30,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:20:30,059 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:20:30,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:20:30,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:20:30,063 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:20:30,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:20:30,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:20:30,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:20:30,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:20:30,065 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:20:30,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:20:30,067 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:20:30,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:20:30,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:20:30,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:20:30,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:20:30,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:20:30,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:20:30,068 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:20:30,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:20:30,069 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:20:30,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:20:30,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:20:30,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:20:30,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:20:30,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:20:30,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:20:30,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:20:30,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:20:30,071 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:20:30,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:20:30,072 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:20:30,072 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:20:30,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:20:30,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2022-07-19 21:20:30,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:20:30,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:20:30,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:20:30,328 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:20:30,329 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:20:30,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-07-19 21:20:30,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca1c90264/f8d49b164e8b446085f069419716dfea/FLAGcf296d0d4 [2022-07-19 21:20:30,885 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:20:30,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-07-19 21:20:30,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca1c90264/f8d49b164e8b446085f069419716dfea/FLAGcf296d0d4 [2022-07-19 21:20:31,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca1c90264/f8d49b164e8b446085f069419716dfea [2022-07-19 21:20:31,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:20:31,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:20:31,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:20:31,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:20:31,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:20:31,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:20:31" (1/1) ... [2022-07-19 21:20:31,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14784136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:31, skipping insertion in model container [2022-07-19 21:20:31,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:20:31" (1/1) ... [2022-07-19 21:20:31,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:20:31,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:20:31,956 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-07-19 21:20:32,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:20:32,072 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:20:32,110 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-07-19 21:20:32,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:20:32,175 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:20:32,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:32 WrapperNode [2022-07-19 21:20:32,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:20:32,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:20:32,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:20:32,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:20:32,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:32" (1/1) ... [2022-07-19 21:20:32,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:32" (1/1) ... [2022-07-19 21:20:32,235 INFO L137 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 227 [2022-07-19 21:20:32,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:20:32,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:20:32,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:20:32,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:20:32,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:32" (1/1) ... [2022-07-19 21:20:32,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:32" (1/1) ... [2022-07-19 21:20:32,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:32" (1/1) ... [2022-07-19 21:20:32,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:32" (1/1) ... [2022-07-19 21:20:32,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:32" (1/1) ... [2022-07-19 21:20:32,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:32" (1/1) ... [2022-07-19 21:20:32,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:32" (1/1) ... [2022-07-19 21:20:32,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:20:32,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:20:32,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:20:32,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:20:32,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:32" (1/1) ... [2022-07-19 21:20:32,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:20:32,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:32,323 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) [2022-07-19 21:20:32,329 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 [2022-07-19 21:20:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:20:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 21:20:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-07-19 21:20:32,357 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-07-19 21:20:32,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:20:32,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:20:32,358 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-07-19 21:20:32,358 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-07-19 21:20:32,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:20:32,358 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:20:32,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:20:32,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:20:32,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 21:20:32,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:20:32,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:20:32,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:20:32,361 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:20:32,479 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:20:32,480 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:20:32,806 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:20:32,815 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:20:32,815 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-19 21:20:32,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:20:32 BoogieIcfgContainer [2022-07-19 21:20:32,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:20:32,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:20:32,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:20:32,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:20:32,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:20:31" (1/3) ... [2022-07-19 21:20:32,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32fd0be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:20:32, skipping insertion in model container [2022-07-19 21:20:32,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:32" (2/3) ... [2022-07-19 21:20:32,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32fd0be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:20:32, skipping insertion in model container [2022-07-19 21:20:32,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:20:32" (3/3) ... [2022-07-19 21:20:32,825 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2022-07-19 21:20:32,830 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:20:32,837 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:20:32,838 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:20:32,838 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:20:32,928 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 21:20:32,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 221 places, 241 transitions, 504 flow [2022-07-19 21:20:33,102 INFO L129 PetriNetUnfolder]: 54/446 cut-off events. [2022-07-19 21:20:33,103 INFO L130 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-07-19 21:20:33,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 446 events. 54/446 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1750 event pairs, 0 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 229. Up to 8 conditions per place. [2022-07-19 21:20:33,115 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 241 transitions, 504 flow [2022-07-19 21:20:33,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 239 transitions, 494 flow [2022-07-19 21:20:33,136 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:33,142 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7adff699, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2ecc4228 [2022-07-19 21:20:33,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:20:33,162 INFO L129 PetriNetUnfolder]: 10/128 cut-off events. [2022-07-19 21:20:33,163 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:33,163 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:33,164 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:33,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:20:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1325719117, now seen corresponding path program 1 times [2022-07-19 21:20:33,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:33,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576116166] [2022-07-19 21:20:33,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:33,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:33,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:33,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576116166] [2022-07-19 21:20:33,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576116166] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:33,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:33,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:20:33,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134925113] [2022-07-19 21:20:33,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:33,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:20:33,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:33,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:20:33,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:20:33,407 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 241 [2022-07-19 21:20:33,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 239 transitions, 494 flow. Second operand has 2 states, 2 states have (on average 218.0) internal successors, (436), 2 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:33,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:33,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 241 [2022-07-19 21:20:33,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:33,494 INFO L129 PetriNetUnfolder]: 11/393 cut-off events. [2022-07-19 21:20:33,494 INFO L130 PetriNetUnfolder]: For 19/29 co-relation queries the response was YES. [2022-07-19 21:20:33,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 393 events. 11/393 cut-off events. For 19/29 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1454 event pairs, 0 based on Foata normal form. 50/418 useless extension candidates. Maximal degree in co-relation 197. Up to 8 conditions per place. [2022-07-19 21:20:33,498 INFO L132 encePairwiseOnDemand]: 224/241 looper letters, 4 selfloop transitions, 0 changer transitions 0/221 dead transitions. [2022-07-19 21:20:33,499 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 221 transitions, 466 flow [2022-07-19 21:20:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:20:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:20:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 455 transitions. [2022-07-19 21:20:33,512 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9439834024896265 [2022-07-19 21:20:33,513 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 455 transitions. [2022-07-19 21:20:33,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 455 transitions. [2022-07-19 21:20:33,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:33,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 455 transitions. [2022-07-19 21:20:33,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 227.5) internal successors, (455), 2 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:33,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:33,530 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:33,531 INFO L186 Difference]: Start difference. First operand has 221 places, 239 transitions, 494 flow. Second operand 2 states and 455 transitions. [2022-07-19 21:20:33,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 221 transitions, 466 flow [2022-07-19 21:20:33,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 221 transitions, 466 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:33,540 INFO L242 Difference]: Finished difference. Result has 221 places, 221 transitions, 458 flow [2022-07-19 21:20:33,543 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=458, PETRI_PLACES=221, PETRI_TRANSITIONS=221} [2022-07-19 21:20:33,546 INFO L279 CegarLoopForPetriNet]: 221 programPoint places, 0 predicate places. [2022-07-19 21:20:33,547 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 221 transitions, 458 flow [2022-07-19 21:20:33,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 218.0) internal successors, (436), 2 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:33,547 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:33,548 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:33,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:20:33,548 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:20:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:33,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1972175826, now seen corresponding path program 1 times [2022-07-19 21:20:33,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:33,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048217824] [2022-07-19 21:20:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:33,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:33,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:33,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048217824] [2022-07-19 21:20:33,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048217824] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:33,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:33,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:33,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093074678] [2022-07-19 21:20:33,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:33,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:33,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:33,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:33,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:33,647 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 241 [2022-07-19 21:20:33,648 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 221 transitions, 458 flow. Second operand has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:33,648 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:33,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 241 [2022-07-19 21:20:33,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:33,743 INFO L129 PetriNetUnfolder]: 11/408 cut-off events. [2022-07-19 21:20:33,744 INFO L130 PetriNetUnfolder]: For 19/29 co-relation queries the response was YES. [2022-07-19 21:20:33,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 408 events. 11/408 cut-off events. For 19/29 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1450 event pairs, 0 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2022-07-19 21:20:33,748 INFO L132 encePairwiseOnDemand]: 238/241 looper letters, 15 selfloop transitions, 2 changer transitions 0/226 dead transitions. [2022-07-19 21:20:33,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 226 transitions, 502 flow [2022-07-19 21:20:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2022-07-19 21:20:33,753 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8921161825726142 [2022-07-19 21:20:33,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2022-07-19 21:20:33,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2022-07-19 21:20:33,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:33,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2022-07-19 21:20:33,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:33,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:33,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:33,760 INFO L186 Difference]: Start difference. First operand has 221 places, 221 transitions, 458 flow. Second operand 3 states and 645 transitions. [2022-07-19 21:20:33,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 226 transitions, 502 flow [2022-07-19 21:20:33,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 226 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:33,772 INFO L242 Difference]: Finished difference. Result has 224 places, 222 transitions, 470 flow [2022-07-19 21:20:33,773 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=470, PETRI_PLACES=224, PETRI_TRANSITIONS=222} [2022-07-19 21:20:33,773 INFO L279 CegarLoopForPetriNet]: 221 programPoint places, 3 predicate places. [2022-07-19 21:20:33,774 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 222 transitions, 470 flow [2022-07-19 21:20:33,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:33,775 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:33,775 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1] [2022-07-19 21:20:33,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:20:33,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:20:33,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:33,777 INFO L85 PathProgramCache]: Analyzing trace with hash -56279307, now seen corresponding path program 1 times [2022-07-19 21:20:33,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:33,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511712986] [2022-07-19 21:20:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:33,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:33,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:33,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511712986] [2022-07-19 21:20:33,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511712986] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:33,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048699085] [2022-07-19 21:20:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:33,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:33,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:33,939 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:33,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:20:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:34,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:20:34,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:34,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:34,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048699085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:34,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:34,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:20:34,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664714642] [2022-07-19 21:20:34,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:34,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:20:34,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:34,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:20:34,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:20:34,315 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 241 [2022-07-19 21:20:34,318 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 222 transitions, 470 flow. Second operand has 10 states, 10 states have (on average 210.4) internal successors, (2104), 10 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:34,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:34,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 241 [2022-07-19 21:20:34,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:34,486 INFO L129 PetriNetUnfolder]: 11/426 cut-off events. [2022-07-19 21:20:34,487 INFO L130 PetriNetUnfolder]: For 20/30 co-relation queries the response was YES. [2022-07-19 21:20:34,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 426 events. 11/426 cut-off events. For 20/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1375 event pairs, 0 based on Foata normal form. 2/404 useless extension candidates. Maximal degree in co-relation 474. Up to 12 conditions per place. [2022-07-19 21:20:34,489 INFO L132 encePairwiseOnDemand]: 235/241 looper letters, 17 selfloop transitions, 9 changer transitions 0/234 dead transitions. [2022-07-19 21:20:34,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 234 transitions, 548 flow [2022-07-19 21:20:34,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:20:34,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:20:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1900 transitions. [2022-07-19 21:20:34,495 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.875979714153988 [2022-07-19 21:20:34,495 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1900 transitions. [2022-07-19 21:20:34,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1900 transitions. [2022-07-19 21:20:34,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:34,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1900 transitions. [2022-07-19 21:20:34,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 211.11111111111111) internal successors, (1900), 9 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:34,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:34,506 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:34,507 INFO L186 Difference]: Start difference. First operand has 224 places, 222 transitions, 470 flow. Second operand 9 states and 1900 transitions. [2022-07-19 21:20:34,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 234 transitions, 548 flow [2022-07-19 21:20:34,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 234 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:34,512 INFO L242 Difference]: Finished difference. Result has 234 places, 228 transitions, 518 flow [2022-07-19 21:20:34,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=518, PETRI_PLACES=234, PETRI_TRANSITIONS=228} [2022-07-19 21:20:34,513 INFO L279 CegarLoopForPetriNet]: 221 programPoint places, 13 predicate places. [2022-07-19 21:20:34,513 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 228 transitions, 518 flow [2022-07-19 21:20:34,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 210.4) internal successors, (2104), 10 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:34,515 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:34,515 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:34,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:34,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:34,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:20:34,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:34,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1794391237, now seen corresponding path program 2 times [2022-07-19 21:20:34,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:34,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648089465] [2022-07-19 21:20:34,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:34,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:34,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:34,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648089465] [2022-07-19 21:20:34,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648089465] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:34,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649299971] [2022-07-19 21:20:34,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:20:34,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:34,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:34,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:34,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:20:35,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:20:35,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:20:35,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:20:35,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:35,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:35,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649299971] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:35,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:35,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:20:35,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699150419] [2022-07-19 21:20:35,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:35,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:20:35,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:35,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:20:35,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:20:35,322 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 241 [2022-07-19 21:20:35,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 228 transitions, 518 flow. Second operand has 18 states, 18 states have (on average 210.66666666666666) internal successors, (3792), 18 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:35,327 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:35,327 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 241 [2022-07-19 21:20:35,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:35,585 INFO L129 PetriNetUnfolder]: 11/490 cut-off events. [2022-07-19 21:20:35,585 INFO L130 PetriNetUnfolder]: For 40/50 co-relation queries the response was YES. [2022-07-19 21:20:35,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 490 events. 11/490 cut-off events. For 40/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1370 event pairs, 0 based on Foata normal form. 4/470 useless extension candidates. Maximal degree in co-relation 609. Up to 12 conditions per place. [2022-07-19 21:20:35,589 INFO L132 encePairwiseOnDemand]: 235/241 looper letters, 29 selfloop transitions, 21 changer transitions 0/258 dead transitions. [2022-07-19 21:20:35,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 258 transitions, 738 flow [2022-07-19 21:20:35,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:20:35,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:20:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4422 transitions. [2022-07-19 21:20:35,600 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8737403675163011 [2022-07-19 21:20:35,600 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4422 transitions. [2022-07-19 21:20:35,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4422 transitions. [2022-07-19 21:20:35,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:35,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4422 transitions. [2022-07-19 21:20:35,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 210.57142857142858) internal successors, (4422), 21 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:35,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 241.0) internal successors, (5302), 22 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:35,624 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 241.0) internal successors, (5302), 22 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:35,624 INFO L186 Difference]: Start difference. First operand has 234 places, 228 transitions, 518 flow. Second operand 21 states and 4422 transitions. [2022-07-19 21:20:35,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 258 transitions, 738 flow [2022-07-19 21:20:35,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 258 transitions, 724 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:35,631 INFO L242 Difference]: Finished difference. Result has 258 places, 241 transitions, 642 flow [2022-07-19 21:20:35,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=642, PETRI_PLACES=258, PETRI_TRANSITIONS=241} [2022-07-19 21:20:35,633 INFO L279 CegarLoopForPetriNet]: 221 programPoint places, 37 predicate places. [2022-07-19 21:20:35,633 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 241 transitions, 642 flow [2022-07-19 21:20:35,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 210.66666666666666) internal successors, (3792), 18 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:35,635 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:35,635 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:35,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 21:20:35,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 21:20:35,857 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:20:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash 536937415, now seen corresponding path program 3 times [2022-07-19 21:20:35,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:35,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153492455] [2022-07-19 21:20:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:35,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:36,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:36,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153492455] [2022-07-19 21:20:36,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153492455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:36,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464577893] [2022-07-19 21:20:36,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:20:36,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:36,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:36,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:36,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process