./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/05_tas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/pthread-ext/05_tas.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 1ee4025da2c93fbd4be930880192a9e0c94d8979f3d9117e228b55f99542c3b0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:00:53,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:00:53,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:00:53,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:00:53,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:00:53,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:00:53,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:00:53,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:00:53,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:00:53,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:00:53,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:00:53,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:00:53,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:00:53,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:00:53,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:00:53,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:00:53,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:00:53,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:00:53,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:00:53,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:00:53,252 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:00:53,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:00:53,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:00:53,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:00:53,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:00:53,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:00:53,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:00:53,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:00:53,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:00:53,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:00:53,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:00:53,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:00:53,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:00:53,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:00:53,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:00:53,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:00:53,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:00:53,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:00:53,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:00:53,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:00:53,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:00:53,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:00:53,273 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:00:53,290 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:00:53,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:00:53,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:00:53,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:00:53,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:00:53,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:00:53,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:00:53,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:00:53,295 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:00:53,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:00:53,297 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:00:53,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:00:53,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:00:53,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:00:53,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:00:53,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:00:53,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:00:53,298 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:00:53,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:00:53,299 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:00:53,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:00:53,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:00:53,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:00:53,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:00:53,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:00:53,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:00:53,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:00:53,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:00:53,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:00:53,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:00:53,301 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:00:53,301 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:00:53,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:00:53,301 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ee4025da2c93fbd4be930880192a9e0c94d8979f3d9117e228b55f99542c3b0 [2022-07-12 10:00:53,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:00:53,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:00:53,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:00:53,483 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:00:53,493 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:00:53,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/05_tas.i [2022-07-12 10:00:53,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4be6b56e/990a199295dc479cb378db88c9c37e61/FLAG6d7216979 [2022-07-12 10:00:53,961 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:00:53,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/05_tas.i [2022-07-12 10:00:53,972 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4be6b56e/990a199295dc479cb378db88c9c37e61/FLAG6d7216979 [2022-07-12 10:00:53,981 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4be6b56e/990a199295dc479cb378db88c9c37e61 [2022-07-12 10:00:53,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:00:53,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:00:53,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:00:53,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:00:53,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:00:53,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:00:53" (1/1) ... [2022-07-12 10:00:53,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e406705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:53, skipping insertion in model container [2022-07-12 10:00:53,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:00:53" (1/1) ... [2022-07-12 10:00:53,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:00:54,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:00:54,333 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/pthread-ext/05_tas.i[30203,30216] [2022-07-12 10:00:54,338 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/pthread-ext/05_tas.i[30300,30313] [2022-07-12 10:00:54,341 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/pthread-ext/05_tas.i[30446,30459] [2022-07-12 10:00:54,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:00:54,354 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:00:54,396 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/pthread-ext/05_tas.i[30203,30216] [2022-07-12 10:00:54,399 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/pthread-ext/05_tas.i[30300,30313] [2022-07-12 10:00:54,401 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/pthread-ext/05_tas.i[30446,30459] [2022-07-12 10:00:54,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:00:54,436 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:00:54,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:54 WrapperNode [2022-07-12 10:00:54,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:00:54,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:00:54,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:00:54,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:00:54,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:54" (1/1) ... [2022-07-12 10:00:54,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:54" (1/1) ... [2022-07-12 10:00:54,471 INFO L137 Inliner]: procedures = 169, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 93 [2022-07-12 10:00:54,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:00:54,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:00:54,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:00:54,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:00:54,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:54" (1/1) ... [2022-07-12 10:00:54,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:54" (1/1) ... [2022-07-12 10:00:54,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:54" (1/1) ... [2022-07-12 10:00:54,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:54" (1/1) ... [2022-07-12 10:00:54,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:54" (1/1) ... [2022-07-12 10:00:54,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:54" (1/1) ... [2022-07-12 10:00:54,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:54" (1/1) ... [2022-07-12 10:00:54,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:00:54,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:00:54,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:00:54,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:00:54,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:54" (1/1) ... [2022-07-12 10:00:54,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:00:54,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:00:54,530 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) [2022-07-12 10:00:54,534 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 [2022-07-12 10:00:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:00:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-12 10:00:54,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-12 10:00:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:00:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:00:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:00:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:00:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:00:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:00:54,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:00:54,561 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:00:54,635 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:00:54,636 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:00:54,777 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:00:54,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:00:54,835 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 10:00:54,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:00:54 BoogieIcfgContainer [2022-07-12 10:00:54,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:00:54,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:00:54,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:00:54,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:00:54,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:00:53" (1/3) ... [2022-07-12 10:00:54,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d809ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:00:54, skipping insertion in model container [2022-07-12 10:00:54,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:54" (2/3) ... [2022-07-12 10:00:54,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d809ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:00:54, skipping insertion in model container [2022-07-12 10:00:54,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:00:54" (3/3) ... [2022-07-12 10:00:54,847 INFO L111 eAbstractionObserver]: Analyzing ICFG 05_tas.i [2022-07-12 10:00:54,851 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:00:54,870 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:00:54,870 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-07-12 10:00:54,870 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:00:54,923 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:00:54,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 91 transitions, 187 flow [2022-07-12 10:00:55,036 INFO L129 PetriNetUnfolder]: 10/102 cut-off events. [2022-07-12 10:00:55,036 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:00:55,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 102 events. 10/102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 130 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2022-07-12 10:00:55,040 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 91 transitions, 187 flow [2022-07-12 10:00:55,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 91 transitions, 187 flow [2022-07-12 10:00:55,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:00:55,062 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@48b432d4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1694bc67 [2022-07-12 10:00:55,062 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-12 10:00:55,075 INFO L129 PetriNetUnfolder]: 3/52 cut-off events. [2022-07-12 10:00:55,076 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:00:55,076 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:55,077 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] [2022-07-12 10:00:55,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:00:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:55,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1564261164, now seen corresponding path program 1 times [2022-07-12 10:00:55,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:55,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201789124] [2022-07-12 10:00:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:55,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:00:55,201 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:00:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:00:55,256 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:00:55,258 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:00:55,259 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-12 10:00:55,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-12 10:00:55,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-12 10:00:55,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-12 10:00:55,262 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-12 10:00:55,262 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-12 10:00:55,262 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-12 10:00:55,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:00:55,263 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:00:55,265 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:00:55,265 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:00:55,307 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:00:55,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 139 places, 151 transitions, 314 flow [2022-07-12 10:00:55,332 INFO L129 PetriNetUnfolder]: 19/175 cut-off events. [2022-07-12 10:00:55,334 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:00:55,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 175 events. 19/175 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 406 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 131. Up to 6 conditions per place. [2022-07-12 10:00:55,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 151 transitions, 314 flow [2022-07-12 10:00:55,338 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 151 transitions, 314 flow [2022-07-12 10:00:55,339 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:00:55,340 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@48b432d4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1694bc67 [2022-07-12 10:00:55,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-07-12 10:00:55,351 INFO L129 PetriNetUnfolder]: 8/96 cut-off events. [2022-07-12 10:00:55,352 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:00:55,352 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:55,352 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:00:55,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-12 10:00:55,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:55,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1001036771, now seen corresponding path program 1 times [2022-07-12 10:00:55,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:55,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679165610] [2022-07-12 10:00:55,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:55,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:00:55,380 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:00:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:00:55,397 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:00:55,400 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:00:55,400 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-07-12 10:00:55,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2022-07-12 10:00:55,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2022-07-12 10:00:55,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2022-07-12 10:00:55,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2022-07-12 10:00:55,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2022-07-12 10:00:55,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2022-07-12 10:00:55,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2022-07-12 10:00:55,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2022-07-12 10:00:55,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2022-07-12 10:00:55,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:00:55,405 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:00:55,405 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:00:55,406 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:00:55,441 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:00:55,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 193 places, 211 transitions, 443 flow [2022-07-12 10:00:55,498 INFO L129 PetriNetUnfolder]: 28/248 cut-off events. [2022-07-12 10:00:55,498 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:00:55,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 248 events. 28/248 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 750 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 190. Up to 8 conditions per place. [2022-07-12 10:00:55,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 211 transitions, 443 flow [2022-07-12 10:00:55,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 211 transitions, 443 flow [2022-07-12 10:00:55,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:00:55,505 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@48b432d4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1694bc67 [2022-07-12 10:00:55,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-07-12 10:00:55,525 INFO L129 PetriNetUnfolder]: 8/98 cut-off events. [2022-07-12 10:00:55,525 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:00:55,526 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:55,526 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:00:55,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2022-07-12 10:00:55,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:55,526 INFO L85 PathProgramCache]: Analyzing trace with hash -14748769, now seen corresponding path program 1 times [2022-07-12 10:00:55,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:55,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418127064] [2022-07-12 10:00:55,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:55,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:55,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:55,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418127064] [2022-07-12 10:00:55,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418127064] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:00:55,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:00:55,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:00:55,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646330505] [2022-07-12 10:00:55,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:00:55,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:00:55,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:55,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:00:55,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:00:55,632 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 211 [2022-07-12 10:00:55,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 211 transitions, 443 flow. Second operand has 2 states, 2 states have (on average 174.5) internal successors, (349), 2 states have internal predecessors, (349), 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) [2022-07-12 10:00:55,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:55,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 211 [2022-07-12 10:00:55,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:55,741 INFO L129 PetriNetUnfolder]: 41/430 cut-off events. [2022-07-12 10:00:55,742 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-07-12 10:00:55,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 430 events. 41/430 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1957 event pairs, 10 based on Foata normal form. 81/473 useless extension candidates. Maximal degree in co-relation 211. Up to 42 conditions per place. [2022-07-12 10:00:55,747 INFO L132 encePairwiseOnDemand]: 191/211 looper letters, 9 selfloop transitions, 0 changer transitions 0/171 dead transitions. [2022-07-12 10:00:55,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 171 transitions, 381 flow [2022-07-12 10:00:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:00:55,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:00:55,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 375 transitions. [2022-07-12 10:00:55,756 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8886255924170616 [2022-07-12 10:00:55,757 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 375 transitions. [2022-07-12 10:00:55,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 375 transitions. [2022-07-12 10:00:55,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:55,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 375 transitions. [2022-07-12 10:00:55,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 187.5) internal successors, (375), 2 states have internal predecessors, (375), 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) [2022-07-12 10:00:55,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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) [2022-07-12 10:00:55,771 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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) [2022-07-12 10:00:55,772 INFO L186 Difference]: Start difference. First operand has 193 places, 211 transitions, 443 flow. Second operand 2 states and 375 transitions. [2022-07-12 10:00:55,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 171 transitions, 381 flow [2022-07-12 10:00:55,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 171 transitions, 375 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-12 10:00:55,778 INFO L242 Difference]: Finished difference. Result has 170 places, 171 transitions, 357 flow [2022-07-12 10:00:55,779 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=357, PETRI_PLACES=170, PETRI_TRANSITIONS=171} [2022-07-12 10:00:55,782 INFO L279 CegarLoopForPetriNet]: 193 programPoint places, -23 predicate places. [2022-07-12 10:00:55,782 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 171 transitions, 357 flow [2022-07-12 10:00:55,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.5) internal successors, (349), 2 states have internal predecessors, (349), 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) [2022-07-12 10:00:55,783 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:55,783 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:00:55,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:00:55,783 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2022-07-12 10:00:55,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:55,784 INFO L85 PathProgramCache]: Analyzing trace with hash -644266269, now seen corresponding path program 1 times [2022-07-12 10:00:55,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:55,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865221271] [2022-07-12 10:00:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:55,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:55,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:55,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865221271] [2022-07-12 10:00:55,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865221271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:00:55,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:00:55,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:00:55,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204387127] [2022-07-12 10:00:55,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:00:55,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:00:55,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:55,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:00:55,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:00:55,892 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 211 [2022-07-12 10:00:55,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 171 transitions, 357 flow. Second operand has 7 states, 7 states have (on average 141.42857142857142) internal successors, (990), 7 states have internal predecessors, (990), 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) [2022-07-12 10:00:55,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:55,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 211 [2022-07-12 10:00:55,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:59,956 INFO L129 PetriNetUnfolder]: 14642/38969 cut-off events. [2022-07-12 10:00:59,956 INFO L130 PetriNetUnfolder]: For 959/959 co-relation queries the response was YES. [2022-07-12 10:01:00,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60323 conditions, 38969 events. 14642/38969 cut-off events. For 959/959 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 448664 event pairs, 2344 based on Foata normal form. 0/35220 useless extension candidates. Maximal degree in co-relation 60317. Up to 7901 conditions per place. [2022-07-12 10:01:00,247 INFO L132 encePairwiseOnDemand]: 191/211 looper letters, 175 selfloop transitions, 72 changer transitions 0/375 dead transitions. [2022-07-12 10:01:00,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 375 transitions, 1344 flow [2022-07-12 10:01:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:01:00,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:01:00,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1919 transitions. [2022-07-12 10:01:00,253 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7578988941548184 [2022-07-12 10:01:00,253 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1919 transitions. [2022-07-12 10:01:00,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1919 transitions. [2022-07-12 10:01:00,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:01:00,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1919 transitions. [2022-07-12 10:01:00,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.91666666666666) internal successors, (1919), 12 states have internal predecessors, (1919), 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) [2022-07-12 10:01:00,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 211.0) internal successors, (2743), 13 states have internal predecessors, (2743), 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) [2022-07-12 10:01:00,263 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 211.0) internal successors, (2743), 13 states have internal predecessors, (2743), 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) [2022-07-12 10:01:00,263 INFO L186 Difference]: Start difference. First operand has 170 places, 171 transitions, 357 flow. Second operand 12 states and 1919 transitions. [2022-07-12 10:01:00,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 375 transitions, 1344 flow [2022-07-12 10:01:00,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 375 transitions, 1344 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:01:00,270 INFO L242 Difference]: Finished difference. Result has 192 places, 257 transitions, 895 flow [2022-07-12 10:01:00,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=895, PETRI_PLACES=192, PETRI_TRANSITIONS=257} [2022-07-12 10:01:00,271 INFO L279 CegarLoopForPetriNet]: 193 programPoint places, -1 predicate places. [2022-07-12 10:01:00,271 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 257 transitions, 895 flow [2022-07-12 10:01:00,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.42857142857142) internal successors, (990), 7 states have internal predecessors, (990), 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) [2022-07-12 10:01:00,272 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:00,272 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:00,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:01:00,273 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2022-07-12 10:01:00,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:00,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1688707293, now seen corresponding path program 1 times [2022-07-12 10:01:00,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:00,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887390869] [2022-07-12 10:01:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:00,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:01:00,287 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:01:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:01:00,300 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:01:00,307 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:01:00,308 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2022-07-12 10:01:00,308 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (11 of 13 remaining) [2022-07-12 10:01:00,310 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (10 of 13 remaining) [2022-07-12 10:01:00,310 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (9 of 13 remaining) [2022-07-12 10:01:00,310 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 13 remaining) [2022-07-12 10:01:00,310 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (7 of 13 remaining) [2022-07-12 10:01:00,310 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (6 of 13 remaining) [2022-07-12 10:01:00,311 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 13 remaining) [2022-07-12 10:01:00,311 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 13 remaining) [2022-07-12 10:01:00,311 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (3 of 13 remaining) [2022-07-12 10:01:00,311 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 13 remaining) [2022-07-12 10:01:00,311 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 13 remaining) [2022-07-12 10:01:00,311 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (0 of 13 remaining) [2022-07-12 10:01:00,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:01:00,312 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:01:00,313 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:01:00,313 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:01:00,338 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:01:00,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 247 places, 271 transitions, 574 flow [2022-07-12 10:01:00,371 INFO L129 PetriNetUnfolder]: 37/321 cut-off events. [2022-07-12 10:01:00,371 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:01:00,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 321 events. 37/321 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1084 event pairs, 0 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 256. Up to 10 conditions per place. [2022-07-12 10:01:00,374 INFO L82 GeneralOperation]: Start removeDead. Operand has 247 places, 271 transitions, 574 flow [2022-07-12 10:01:00,378 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 247 places, 271 transitions, 574 flow [2022-07-12 10:01:00,378 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:01:00,379 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@48b432d4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1694bc67 [2022-07-12 10:01:00,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-07-12 10:01:00,384 INFO L129 PetriNetUnfolder]: 9/101 cut-off events. [2022-07-12 10:01:00,384 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:01:00,384 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:00,384 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:01:00,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2022-07-12 10:01:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:00,385 INFO L85 PathProgramCache]: Analyzing trace with hash -785605138, now seen corresponding path program 1 times [2022-07-12 10:01:00,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:00,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480479095] [2022-07-12 10:01:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:00,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:01:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:01:00,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:01:00,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480479095] [2022-07-12 10:01:00,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480479095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:01:00,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:01:00,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:01:00,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547282608] [2022-07-12 10:01:00,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:01:00,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:01:00,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:01:00,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:01:00,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:01:00,428 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 271 [2022-07-12 10:01:00,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 271 transitions, 574 flow. Second operand has 2 states, 2 states have (on average 222.5) internal successors, (445), 2 states have internal predecessors, (445), 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) [2022-07-12 10:01:00,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:01:00,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 271 [2022-07-12 10:01:00,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:01:00,536 INFO L129 PetriNetUnfolder]: 113/922 cut-off events. [2022-07-12 10:01:00,537 INFO L130 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-07-12 10:01:00,547 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 922 events. 113/922 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 5671 event pairs, 34 based on Foata normal form. 228/1068 useless extension candidates. Maximal degree in co-relation 503. Up to 114 conditions per place. [2022-07-12 10:01:00,551 INFO L132 encePairwiseOnDemand]: 245/271 looper letters, 12 selfloop transitions, 0 changer transitions 0/220 dead transitions. [2022-07-12 10:01:00,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 220 transitions, 496 flow [2022-07-12 10:01:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:01:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:01:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 480 transitions. [2022-07-12 10:01:00,553 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8856088560885609 [2022-07-12 10:01:00,553 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 480 transitions. [2022-07-12 10:01:00,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 480 transitions. [2022-07-12 10:01:00,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:01:00,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 480 transitions. [2022-07-12 10:01:00,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 240.0) internal successors, (480), 2 states have internal predecessors, (480), 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) [2022-07-12 10:01:00,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 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) [2022-07-12 10:01:00,556 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 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) [2022-07-12 10:01:00,556 INFO L186 Difference]: Start difference. First operand has 247 places, 271 transitions, 574 flow. Second operand 2 states and 480 transitions. [2022-07-12 10:01:00,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 220 transitions, 496 flow [2022-07-12 10:01:00,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 220 transitions, 484 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-12 10:01:00,562 INFO L242 Difference]: Finished difference. Result has 218 places, 220 transitions, 460 flow [2022-07-12 10:01:00,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=460, PETRI_PLACES=218, PETRI_TRANSITIONS=220} [2022-07-12 10:01:00,565 INFO L279 CegarLoopForPetriNet]: 247 programPoint places, -29 predicate places. [2022-07-12 10:01:00,565 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 220 transitions, 460 flow [2022-07-12 10:01:00,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 222.5) internal successors, (445), 2 states have internal predecessors, (445), 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) [2022-07-12 10:01:00,566 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:00,566 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:01:00,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:01:00,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2022-07-12 10:01:00,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:00,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1592115890, now seen corresponding path program 1 times [2022-07-12 10:01:00,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:00,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302764603] [2022-07-12 10:01:00,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:00,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:01:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:01:00,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:01:00,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302764603] [2022-07-12 10:01:00,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302764603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:01:00,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:01:00,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:01:00,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742321619] [2022-07-12 10:01:00,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:01:00,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:01:00,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:01:00,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:01:00,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:01:00,659 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 271 [2022-07-12 10:01:00,660 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 220 transitions, 460 flow. Second operand has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 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) [2022-07-12 10:01:00,660 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:01:00,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 271 [2022-07-12 10:01:00,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand