./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-lit/sssc12_variant.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-lit/sssc12_variant.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 7be74b3f1207f4387a275e1f4e0e57734d5f1b215282bd8d49efde8c6948d207 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:45:19,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:45:19,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:45:19,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:45:19,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:45:19,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:45:19,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:45:19,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:45:19,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:45:19,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:45:19,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:45:19,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:45:19,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:45:19,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:45:19,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:45:19,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:45:19,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:45:19,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:45:19,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:45:19,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:45:19,358 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:45:19,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:45:19,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:45:19,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:45:19,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:45:19,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:45:19,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:45:19,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:45:19,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:45:19,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:45:19,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:45:19,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:45:19,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:45:19,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:45:19,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:45:19,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:45:19,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:45:19,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:45:19,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:45:19,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:45:19,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:45:19,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:45:19,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:45:19,420 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:45:19,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:45:19,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:45:19,421 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:45:19,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:45:19,423 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:45:19,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:45:19,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:45:19,424 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:45:19,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:45:19,425 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:45:19,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:45:19,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:45:19,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:45:19,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:45:19,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:45:19,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:45:19,427 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:45:19,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:45:19,427 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:45:19,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:45:19,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:45:19,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:45:19,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:45:19,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:45:19,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:45:19,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:45:19,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:45:19,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:45:19,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:45:19,429 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:45:19,430 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:45:19,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:45:19,430 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7be74b3f1207f4387a275e1f4e0e57734d5f1b215282bd8d49efde8c6948d207 [2022-07-21 08:45:19,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:45:19,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:45:19,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:45:19,804 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:45:19,804 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:45:19,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-lit/sssc12_variant.i [2022-07-21 08:45:19,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a470f7ec6/37ba6095d0454c879576ae5e34f0c05d/FLAG54d77465e [2022-07-21 08:45:20,404 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:45:20,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12_variant.i [2022-07-21 08:45:20,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a470f7ec6/37ba6095d0454c879576ae5e34f0c05d/FLAG54d77465e [2022-07-21 08:45:20,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a470f7ec6/37ba6095d0454c879576ae5e34f0c05d [2022-07-21 08:45:20,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:45:20,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:45:20,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:45:20,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:45:20,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:45:20,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:45:20" (1/1) ... [2022-07-21 08:45:20,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@161388e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:20, skipping insertion in model container [2022-07-21 08:45:20,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:45:20" (1/1) ... [2022-07-21 08:45:20,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:45:20,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:45:21,179 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-lit/sssc12_variant.i[46865,46878] [2022-07-21 08:45:21,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:45:21,214 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:45:21,255 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-lit/sssc12_variant.i[46865,46878] [2022-07-21 08:45:21,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:45:21,309 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:45:21,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:21 WrapperNode [2022-07-21 08:45:21,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:45:21,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:45:21,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:45:21,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:45:21,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:21" (1/1) ... [2022-07-21 08:45:21,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:21" (1/1) ... [2022-07-21 08:45:21,389 INFO L137 Inliner]: procedures = 275, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 87 [2022-07-21 08:45:21,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:45:21,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:45:21,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:45:21,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:45:21,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:21" (1/1) ... [2022-07-21 08:45:21,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:21" (1/1) ... [2022-07-21 08:45:21,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:21" (1/1) ... [2022-07-21 08:45:21,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:21" (1/1) ... [2022-07-21 08:45:21,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:21" (1/1) ... [2022-07-21 08:45:21,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:21" (1/1) ... [2022-07-21 08:45:21,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:21" (1/1) ... [2022-07-21 08:45:21,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:45:21,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:45:21,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:45:21,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:45:21,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:21" (1/1) ... [2022-07-21 08:45:21,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:45:21,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:45:21,477 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) [2022-07-21 08:45:21,497 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 [2022-07-21 08:45:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 08:45:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-07-21 08:45:21,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-07-21 08:45:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:45:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:45:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 08:45:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:45:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:45:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 08:45:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:45:21,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:45:21,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:45:21,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:45:21,516 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:45:21,652 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:45:21,653 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:45:21,885 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:45:21,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:45:21,924 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 08:45:21,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:45:21 BoogieIcfgContainer [2022-07-21 08:45:21,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:45:21,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:45:21,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:45:21,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:45:21,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:45:20" (1/3) ... [2022-07-21 08:45:21,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7586e682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:45:21, skipping insertion in model container [2022-07-21 08:45:21,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:21" (2/3) ... [2022-07-21 08:45:21,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7586e682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:45:21, skipping insertion in model container [2022-07-21 08:45:21,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:45:21" (3/3) ... [2022-07-21 08:45:21,935 INFO L111 eAbstractionObserver]: Analyzing ICFG sssc12_variant.i [2022-07-21 08:45:21,940 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:45:21,949 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:45:21,949 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:45:21,949 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:45:22,006 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:45:22,054 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 88 transitions, 181 flow [2022-07-21 08:45:22,103 INFO L129 PetriNetUnfolder]: 7/100 cut-off events. [2022-07-21 08:45:22,104 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:45:22,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 100 events. 7/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2022-07-21 08:45:22,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 88 transitions, 181 flow [2022-07-21 08:45:22,115 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 88 transitions, 181 flow [2022-07-21 08:45:22,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:45:22,140 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@1cdbff96, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@578aaad9 [2022-07-21 08:45:22,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 08:45:22,167 INFO L129 PetriNetUnfolder]: 3/67 cut-off events. [2022-07-21 08:45:22,168 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:45:22,168 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:22,169 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] [2022-07-21 08:45:22,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:45:22,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:22,176 INFO L85 PathProgramCache]: Analyzing trace with hash 178627719, now seen corresponding path program 1 times [2022-07-21 08:45:22,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:22,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475996532] [2022-07-21 08:45:22,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:22,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:22,304 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:45:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:22,372 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:45:22,374 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:45:22,375 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-21 08:45:22,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-21 08:45:22,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-21 08:45:22,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:45:22,378 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 08:45:22,381 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:45:22,381 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:45:22,405 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:45:22,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 120 places, 125 transitions, 262 flow [2022-07-21 08:45:22,441 INFO L129 PetriNetUnfolder]: 12/151 cut-off events. [2022-07-21 08:45:22,441 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:45:22,443 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 151 events. 12/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 268 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2022-07-21 08:45:22,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 125 transitions, 262 flow [2022-07-21 08:45:22,445 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 125 transitions, 262 flow [2022-07-21 08:45:22,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:45:22,447 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@1cdbff96, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@578aaad9 [2022-07-21 08:45:22,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 08:45:22,460 INFO L129 PetriNetUnfolder]: 6/103 cut-off events. [2022-07-21 08:45:22,460 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:45:22,461 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:22,461 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:22,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-21 08:45:22,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:22,462 INFO L85 PathProgramCache]: Analyzing trace with hash 485553204, now seen corresponding path program 1 times [2022-07-21 08:45:22,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:22,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756814126] [2022-07-21 08:45:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:22,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:22,492 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:45:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:22,522 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:45:22,523 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:45:22,523 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-21 08:45:22,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-21 08:45:22,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-21 08:45:22,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-21 08:45:22,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:45:22,525 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 08:45:22,525 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:45:22,526 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:45:22,549 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:45:22,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 162 transitions, 345 flow [2022-07-21 08:45:22,619 INFO L129 PetriNetUnfolder]: 17/202 cut-off events. [2022-07-21 08:45:22,620 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:45:22,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 202 events. 17/202 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 485 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2022-07-21 08:45:22,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 162 transitions, 345 flow [2022-07-21 08:45:22,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 162 transitions, 345 flow [2022-07-21 08:45:22,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:45:22,627 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@1cdbff96, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@578aaad9 [2022-07-21 08:45:22,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 08:45:22,641 INFO L129 PetriNetUnfolder]: 9/143 cut-off events. [2022-07-21 08:45:22,642 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:45:22,642 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:22,642 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:22,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:45:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:22,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1781292582, now seen corresponding path program 1 times [2022-07-21 08:45:22,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:22,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824753697] [2022-07-21 08:45:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:22,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:22,694 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:45:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:22,745 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:45:22,746 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:45:22,746 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-21 08:45:22,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-21 08:45:22,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-21 08:45:22,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-21 08:45:22,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-21 08:45:22,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:45:22,750 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 08:45:22,755 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:45:22,755 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:45:22,800 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:45:22,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 190 places, 199 transitions, 430 flow [2022-07-21 08:45:22,859 INFO L129 PetriNetUnfolder]: 22/253 cut-off events. [2022-07-21 08:45:22,859 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:45:22,864 INFO L84 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 253 events. 22/253 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 696 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 210. Up to 10 conditions per place. [2022-07-21 08:45:22,864 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 199 transitions, 430 flow [2022-07-21 08:45:22,868 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 199 transitions, 430 flow [2022-07-21 08:45:22,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:45:22,872 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@1cdbff96, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@578aaad9 [2022-07-21 08:45:22,877 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-21 08:45:22,896 INFO L129 PetriNetUnfolder]: 9/151 cut-off events. [2022-07-21 08:45:22,896 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-21 08:45:22,896 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:22,896 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:22,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:45:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:22,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1586586166, now seen corresponding path program 1 times [2022-07-21 08:45:22,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:22,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690187413] [2022-07-21 08:45:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:22,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:23,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:23,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690187413] [2022-07-21 08:45:23,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690187413] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:23,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:23,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:45:23,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700988982] [2022-07-21 08:45:23,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:23,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:45:23,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:23,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:45:23,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:45:23,072 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 199 [2022-07-21 08:45:23,076 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 199 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 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) [2022-07-21 08:45:23,076 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:23,076 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 199 [2022-07-21 08:45:23,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:24,734 INFO L129 PetriNetUnfolder]: 1812/7147 cut-off events. [2022-07-21 08:45:24,734 INFO L130 PetriNetUnfolder]: For 1954/1954 co-relation queries the response was YES. [2022-07-21 08:45:24,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10386 conditions, 7147 events. 1812/7147 cut-off events. For 1954/1954 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 75757 event pairs, 992 based on Foata normal form. 1834/8290 useless extension candidates. Maximal degree in co-relation 6880. Up to 1573 conditions per place. [2022-07-21 08:45:24,868 INFO L132 encePairwiseOnDemand]: 184/199 looper letters, 42 selfloop transitions, 3 changer transitions 1/198 dead transitions. [2022-07-21 08:45:24,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 198 transitions, 560 flow [2022-07-21 08:45:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:45:24,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:45:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 710 transitions. [2022-07-21 08:45:24,890 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8919597989949749 [2022-07-21 08:45:24,891 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 710 transitions. [2022-07-21 08:45:24,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 710 transitions. [2022-07-21 08:45:24,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:24,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 710 transitions. [2022-07-21 08:45:24,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 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) [2022-07-21 08:45:24,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 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) [2022-07-21 08:45:24,914 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 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) [2022-07-21 08:45:24,916 INFO L186 Difference]: Start difference. First operand has 190 places, 199 transitions, 430 flow. Second operand 4 states and 710 transitions. [2022-07-21 08:45:24,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 198 transitions, 560 flow [2022-07-21 08:45:24,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 198 transitions, 536 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-07-21 08:45:24,928 INFO L242 Difference]: Finished difference. Result has 183 places, 177 transitions, 384 flow [2022-07-21 08:45:24,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=384, PETRI_PLACES=183, PETRI_TRANSITIONS=177} [2022-07-21 08:45:24,934 INFO L279 CegarLoopForPetriNet]: 190 programPoint places, -7 predicate places. [2022-07-21 08:45:24,935 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 177 transitions, 384 flow [2022-07-21 08:45:24,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 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) [2022-07-21 08:45:24,936 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:24,936 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, 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] [2022-07-21 08:45:24,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:45:24,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:45:24,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:24,937 INFO L85 PathProgramCache]: Analyzing trace with hash -893966395, now seen corresponding path program 1 times [2022-07-21 08:45:24,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:24,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213508234] [2022-07-21 08:45:24,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:24,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:25,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:25,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213508234] [2022-07-21 08:45:25,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213508234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:25,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:25,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:45:25,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616789236] [2022-07-21 08:45:25,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:25,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:45:25,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:45:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:45:25,118 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 199 [2022-07-21 08:45:25,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 177 transitions, 384 flow. Second operand has 6 states, 6 states have (on average 146.16666666666666) internal successors, (877), 6 states have internal predecessors, (877), 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) [2022-07-21 08:45:25,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:25,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 199 [2022-07-21 08:45:25,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:47,836 INFO L129 PetriNetUnfolder]: 93033/198443 cut-off events. [2022-07-21 08:45:47,836 INFO L130 PetriNetUnfolder]: For 7802/7802 co-relation queries the response was YES. [2022-07-21 08:45:49,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 329031 conditions, 198443 events. 93033/198443 cut-off events. For 7802/7802 co-relation queries the response was YES. Maximal size of possible extension queue 5800. Compared 2554414 event pairs, 24595 based on Foata normal form. 0/183178 useless extension candidates. Maximal degree in co-relation 280393. Up to 38577 conditions per place. [2022-07-21 08:45:50,863 INFO L132 encePairwiseOnDemand]: 186/199 looper letters, 273 selfloop transitions, 48 changer transitions 0/457 dead transitions. [2022-07-21 08:45:50,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 457 transitions, 1780 flow [2022-07-21 08:45:50,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 08:45:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 08:45:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2468 transitions. [2022-07-21 08:45:50,870 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8268006700167504 [2022-07-21 08:45:50,870 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2468 transitions. [2022-07-21 08:45:50,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2468 transitions. [2022-07-21 08:45:50,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:50,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2468 transitions. [2022-07-21 08:45:50,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 164.53333333333333) internal successors, (2468), 15 states have internal predecessors, (2468), 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) [2022-07-21 08:45:50,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 199.0) internal successors, (3184), 16 states have internal predecessors, (3184), 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) [2022-07-21 08:45:50,884 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 199.0) internal successors, (3184), 16 states have internal predecessors, (3184), 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) [2022-07-21 08:45:50,885 INFO L186 Difference]: Start difference. First operand has 183 places, 177 transitions, 384 flow. Second operand 15 states and 2468 transitions. [2022-07-21 08:45:50,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 457 transitions, 1780 flow [2022-07-21 08:45:50,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 457 transitions, 1774 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:45:50,923 INFO L242 Difference]: Finished difference. Result has 203 places, 227 transitions, 733 flow [2022-07-21 08:45:50,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=733, PETRI_PLACES=203, PETRI_TRANSITIONS=227} [2022-07-21 08:45:50,925 INFO L279 CegarLoopForPetriNet]: 190 programPoint places, 13 predicate places. [2022-07-21 08:45:50,926 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 227 transitions, 733 flow [2022-07-21 08:45:50,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 146.16666666666666) internal successors, (877), 6 states have internal predecessors, (877), 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) [2022-07-21 08:45:50,927 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:50,927 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 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] [2022-07-21 08:45:50,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:45:50,933 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:45:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:50,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1090530460, now seen corresponding path program 1 times [2022-07-21 08:45:50,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:50,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013076510] [2022-07-21 08:45:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:50,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:50,978 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:45:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:51,019 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:45:51,024 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:45:51,024 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-21 08:45:51,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-21 08:45:51,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-21 08:45:51,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-21 08:45:51,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-21 08:45:51,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-21 08:45:51,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:45:51,026 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:45:51,026 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:45:51,027 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 08:45:51,058 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:45:51,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 225 places, 236 transitions, 517 flow [2022-07-21 08:45:51,121 INFO L129 PetriNetUnfolder]: 27/304 cut-off events. [2022-07-21 08:45:51,121 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-21 08:45:51,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 304 events. 27/304 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 913 event pairs, 0 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 266. Up to 12 conditions per place. [2022-07-21 08:45:51,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 236 transitions, 517 flow [2022-07-21 08:45:51,130 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 225 places, 236 transitions, 517 flow [2022-07-21 08:45:51,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:45:51,139 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@1cdbff96, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@578aaad9 [2022-07-21 08:45:51,139 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-21 08:45:51,155 INFO L129 PetriNetUnfolder]: 10/159 cut-off events. [2022-07-21 08:45:51,155 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-21 08:45:51,155 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:51,156 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:51,156 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:45:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:51,156 INFO L85 PathProgramCache]: Analyzing trace with hash -341254586, now seen corresponding path program 1 times [2022-07-21 08:45:51,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:51,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042111684] [2022-07-21 08:45:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:51,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:51,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:51,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042111684] [2022-07-21 08:45:51,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042111684] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:51,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:51,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:45:51,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52552520] [2022-07-21 08:45:51,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:51,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:45:51,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:51,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:45:51,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:45:51,242 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 236 [2022-07-21 08:45:51,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 236 transitions, 517 flow. Second operand has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 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) [2022-07-21 08:45:51,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:51,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 236 [2022-07-21 08:45:51,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:55,116 INFO L129 PetriNetUnfolder]: 7800/32460 cut-off events. [2022-07-21 08:45:55,116 INFO L130 PetriNetUnfolder]: For 9233/9233 co-relation queries the response was YES. [2022-07-21 08:45:55,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44507 conditions, 32460 events. 7800/32460 cut-off events. For 9233/9233 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 444402 event pairs, 5308 based on Foata normal form. 6928/36162 useless extension candidates. Maximal degree in co-relation 15624. Up to 5846 conditions per place. [2022-07-21 08:45:55,743 INFO L132 encePairwiseOnDemand]: 219/236 looper letters, 51 selfloop transitions, 3 changer transitions 1/238 dead transitions. [2022-07-21 08:45:55,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 238 transitions, 693 flow [2022-07-21 08:45:55,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:45:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:45:55,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 849 transitions. [2022-07-21 08:45:55,746 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.899364406779661 [2022-07-21 08:45:55,746 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 849 transitions. [2022-07-21 08:45:55,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 849 transitions. [2022-07-21 08:45:55,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:55,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 849 transitions. [2022-07-21 08:45:55,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 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) [2022-07-21 08:45:55,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 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) [2022-07-21 08:45:55,753 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 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) [2022-07-21 08:45:55,753 INFO L186 Difference]: Start difference. First operand has 225 places, 236 transitions, 517 flow. Second operand 4 states and 849 transitions. [2022-07-21 08:45:55,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 238 transitions, 693 flow [2022-07-21 08:45:55,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 238 transitions, 649 flow, removed 22 selfloop flow, removed 0 redundant places. [2022-07-21 08:45:55,766 INFO L242 Difference]: Finished difference. Result has 217 places, 211 transitions, 457 flow [2022-07-21 08:45:55,766 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=457, PETRI_PLACES=217, PETRI_TRANSITIONS=211} [2022-07-21 08:45:55,768 INFO L279 CegarLoopForPetriNet]: 225 programPoint places, -8 predicate places. [2022-07-21 08:45:55,768 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 211 transitions, 457 flow [2022-07-21 08:45:55,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 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) [2022-07-21 08:45:55,769 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:55,769 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, 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] [2022-07-21 08:45:55,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:45:55,772 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:45:55,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:55,774 INFO L85 PathProgramCache]: Analyzing trace with hash -894821271, now seen corresponding path program 1 times [2022-07-21 08:45:55,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:55,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903636883] [2022-07-21 08:45:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:55,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:55,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:55,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903636883] [2022-07-21 08:45:55,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903636883] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:55,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:55,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:45:55,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154169385] [2022-07-21 08:45:55,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:55,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:45:55,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:55,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:45:55,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:45:55,850 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 236 [2022-07-21 08:45:55,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 211 transitions, 457 flow. Second operand has 6 states, 6 states have (on average 174.16666666666666) internal successors, (1045), 6 states have internal predecessors, (1045), 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) [2022-07-21 08:45:55,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:55,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 236 [2022-07-21 08:45:55,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand