./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.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/goblint-regression/28-race_reach_71-funloop_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:17:17,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:17:17,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:17:17,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:17:17,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:17:17,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:17:17,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:17:17,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:17:17,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:17:17,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:17:17,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:17:17,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:17:17,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:17:17,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:17:17,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:17:17,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:17:17,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:17:17,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:17:17,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:17:17,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:17:17,346 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:17:17,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:17:17,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:17:17,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:17:17,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:17:17,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:17:17,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:17:17,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:17:17,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:17:17,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:17:17,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:17:17,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:17:17,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:17:17,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:17:17,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:17:17,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:17:17,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:17:17,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:17:17,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:17:17,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:17:17,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:17:17,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:17:17,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:17:17,399 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:17:17,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:17:17,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:17:17,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:17:17,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:17:17,402 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:17:17,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:17:17,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:17:17,403 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:17:17,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:17:17,404 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:17:17,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:17:17,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:17:17,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:17:17,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:17:17,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:17:17,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:17:17,406 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:17:17,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:17:17,406 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:17:17,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:17:17,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:17:17,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:17:17,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:17:17,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:17:17,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:17:17,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:17:17,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:17:17,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:17:17,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:17:17,409 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:17:17,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:17:17,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:17:17,410 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f [2022-07-12 10:17:17,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:17:17,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:17:17,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:17:17,651 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:17:17,652 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:17:17,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2022-07-12 10:17:17,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c45a513c7/808b9cf0182648769ca9074e3ec7700d/FLAGafea7819f [2022-07-12 10:17:18,153 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:17:18,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2022-07-12 10:17:18,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c45a513c7/808b9cf0182648769ca9074e3ec7700d/FLAGafea7819f [2022-07-12 10:17:18,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c45a513c7/808b9cf0182648769ca9074e3ec7700d [2022-07-12 10:17:18,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:17:18,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:17:18,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:17:18,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:17:18,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:17:18,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:17:18" (1/1) ... [2022-07-12 10:17:18,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@599f4f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:18, skipping insertion in model container [2022-07-12 10:17:18,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:17:18" (1/1) ... [2022-07-12 10:17:18,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:17:18,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:17:18,620 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2022-07-12 10:17:18,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:17:18,686 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:17:18,720 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2022-07-12 10:17:18,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:17:18,791 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:17:18,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:18 WrapperNode [2022-07-12 10:17:18,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:17:18,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:17:18,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:17:18,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:17:18,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:18" (1/1) ... [2022-07-12 10:17:18,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:18" (1/1) ... [2022-07-12 10:17:18,883 INFO L137 Inliner]: procedures = 271, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 244 [2022-07-12 10:17:18,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:17:18,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:17:18,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:17:18,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:17:18,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:18" (1/1) ... [2022-07-12 10:17:18,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:18" (1/1) ... [2022-07-12 10:17:18,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:18" (1/1) ... [2022-07-12 10:17:18,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:18" (1/1) ... [2022-07-12 10:17:18,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:18" (1/1) ... [2022-07-12 10:17:18,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:18" (1/1) ... [2022-07-12 10:17:18,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:18" (1/1) ... [2022-07-12 10:17:18,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:17:18,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:17:18,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:17:18,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:17:18,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:18" (1/1) ... [2022-07-12 10:17:18,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:17:18,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:18,973 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 10:17:18,983 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 10:17:19,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:17:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:17:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:17:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:17:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:17:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:17:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-12 10:17:19,008 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-12 10:17:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:17:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:17:19,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:17:19,010 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 10:17:19,166 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:17:19,168 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:17:19,457 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:17:19,465 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:17:19,466 INFO L299 CfgBuilder]: Removed 35 assume(true) statements. [2022-07-12 10:17:19,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:17:19 BoogieIcfgContainer [2022-07-12 10:17:19,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:17:19,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:17:19,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:17:19,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:17:19,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:17:18" (1/3) ... [2022-07-12 10:17:19,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4844d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:17:19, skipping insertion in model container [2022-07-12 10:17:19,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:18" (2/3) ... [2022-07-12 10:17:19,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4844d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:17:19, skipping insertion in model container [2022-07-12 10:17:19,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:17:19" (3/3) ... [2022-07-12 10:17:19,478 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2022-07-12 10:17:19,483 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:17:19,492 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:17:19,492 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-07-12 10:17:19,492 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:17:19,550 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-12 10:17:19,606 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 210 places, 252 transitions, 512 flow [2022-07-12 10:17:19,705 INFO L129 PetriNetUnfolder]: 73/388 cut-off events. [2022-07-12 10:17:19,705 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:17:19,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 388 events. 73/388 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1729 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 212. Up to 8 conditions per place. [2022-07-12 10:17:19,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 252 transitions, 512 flow [2022-07-12 10:17:19,729 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 247 transitions, 499 flow [2022-07-12 10:17:19,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:19,745 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@3d56e0c1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@74438cd0 [2022-07-12 10:17:19,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:17:19,769 INFO L129 PetriNetUnfolder]: 21/159 cut-off events. [2022-07-12 10:17:19,769 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:19,770 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:19,770 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] [2022-07-12 10:17:19,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:17:19,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:19,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1626268510, now seen corresponding path program 1 times [2022-07-12 10:17:19,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:19,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728202462] [2022-07-12 10:17:19,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:19,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:19,994 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 10:17:19,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:19,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728202462] [2022-07-12 10:17:19,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728202462] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:19,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:19,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:19,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217591123] [2022-07-12 10:17:19,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:20,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:20,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:20,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:20,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:20,045 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 252 [2022-07-12 10:17:20,053 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 247 transitions, 499 flow. Second operand has 2 states, 2 states have (on average 210.0) internal successors, (420), 2 states have internal predecessors, (420), 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 10:17:20,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:20,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 252 [2022-07-12 10:17:20,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:20,147 INFO L129 PetriNetUnfolder]: 9/315 cut-off events. [2022-07-12 10:17:20,148 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:17:20,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 315 events. 9/315 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1381 event pairs, 0 based on Foata normal form. 63/360 useless extension candidates. Maximal degree in co-relation 174. Up to 4 conditions per place. [2022-07-12 10:17:20,153 INFO L132 encePairwiseOnDemand]: 214/252 looper letters, 1 selfloop transitions, 0 changer transitions 0/206 dead transitions. [2022-07-12 10:17:20,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 206 transitions, 419 flow [2022-07-12 10:17:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:20,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:20,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 457 transitions. [2022-07-12 10:17:20,178 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9067460317460317 [2022-07-12 10:17:20,179 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 457 transitions. [2022-07-12 10:17:20,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 457 transitions. [2022-07-12 10:17:20,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:20,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 457 transitions. [2022-07-12 10:17:20,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 228.5) internal successors, (457), 2 states have internal predecessors, (457), 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 10:17:20,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 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 10:17:20,197 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 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 10:17:20,199 INFO L186 Difference]: Start difference. First operand has 206 places, 247 transitions, 499 flow. Second operand 2 states and 457 transitions. [2022-07-12 10:17:20,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 206 transitions, 419 flow [2022-07-12 10:17:20,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 206 transitions, 419 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:20,211 INFO L242 Difference]: Finished difference. Result has 204 places, 206 transitions, 417 flow [2022-07-12 10:17:20,214 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=417, PETRI_PLACES=204, PETRI_TRANSITIONS=206} [2022-07-12 10:17:20,218 INFO L279 CegarLoopForPetriNet]: 206 programPoint places, -2 predicate places. [2022-07-12 10:17:20,218 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 206 transitions, 417 flow [2022-07-12 10:17:20,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 210.0) internal successors, (420), 2 states have internal predecessors, (420), 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 10:17:20,219 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:20,220 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] [2022-07-12 10:17:20,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:17:20,220 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:17:20,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash 350857692, now seen corresponding path program 1 times [2022-07-12 10:17:20,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:20,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022672993] [2022-07-12 10:17:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:20,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:17:20,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:20,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022672993] [2022-07-12 10:17:20,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022672993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:20,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:20,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:20,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085714805] [2022-07-12 10:17:20,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:20,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:20,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:20,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:20,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:20,348 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 252 [2022-07-12 10:17:20,349 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 206 transitions, 417 flow. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 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 10:17:20,350 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:20,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 252 [2022-07-12 10:17:20,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:20,402 INFO L129 PetriNetUnfolder]: 9/319 cut-off events. [2022-07-12 10:17:20,403 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:17:20,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 319 events. 9/319 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1379 event pairs, 0 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 334. Up to 9 conditions per place. [2022-07-12 10:17:20,411 INFO L132 encePairwiseOnDemand]: 249/252 looper letters, 10 selfloop transitions, 2 changer transitions 0/210 dead transitions. [2022-07-12 10:17:20,411 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 210 transitions, 449 flow [2022-07-12 10:17:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2022-07-12 10:17:20,414 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8187830687830688 [2022-07-12 10:17:20,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2022-07-12 10:17:20,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2022-07-12 10:17:20,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:20,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2022-07-12 10:17:20,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 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 10:17:20,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 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 10:17:20,420 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 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 10:17:20,421 INFO L186 Difference]: Start difference. First operand has 204 places, 206 transitions, 417 flow. Second operand 3 states and 619 transitions. [2022-07-12 10:17:20,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 210 transitions, 449 flow [2022-07-12 10:17:20,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 210 transitions, 449 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:20,432 INFO L242 Difference]: Finished difference. Result has 207 places, 207 transitions, 429 flow [2022-07-12 10:17:20,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=429, PETRI_PLACES=207, PETRI_TRANSITIONS=207} [2022-07-12 10:17:20,433 INFO L279 CegarLoopForPetriNet]: 206 programPoint places, 1 predicate places. [2022-07-12 10:17:20,433 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 207 transitions, 429 flow [2022-07-12 10:17:20,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 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 10:17:20,434 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:20,435 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:20,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:17:20,436 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:17:20,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:20,438 INFO L85 PathProgramCache]: Analyzing trace with hash 471585416, now seen corresponding path program 1 times [2022-07-12 10:17:20,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:20,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057321916] [2022-07-12 10:17:20,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:20,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:17:20,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:20,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057321916] [2022-07-12 10:17:20,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057321916] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:20,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764714726] [2022-07-12 10:17:20,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:20,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:20,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:20,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:20,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:17:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:20,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:20,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:17:20,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:17:20,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764714726] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:20,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:20,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:20,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752394792] [2022-07-12 10:17:20,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:20,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:20,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:20,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:20,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:20,797 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 252 [2022-07-12 10:17:20,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 207 transitions, 429 flow. Second operand has 10 states, 10 states have (on average 203.1) internal successors, (2031), 10 states have internal predecessors, (2031), 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 10:17:20,800 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:20,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 252 [2022-07-12 10:17:20,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:20,914 INFO L129 PetriNetUnfolder]: 9/326 cut-off events. [2022-07-12 10:17:20,916 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:17:20,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 326 events. 9/326 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1374 event pairs, 0 based on Foata normal form. 2/311 useless extension candidates. Maximal degree in co-relation 355. Up to 6 conditions per place. [2022-07-12 10:17:20,919 INFO L132 encePairwiseOnDemand]: 246/252 looper letters, 11 selfloop transitions, 9 changer transitions 0/217 dead transitions. [2022-07-12 10:17:20,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 217 transitions, 491 flow [2022-07-12 10:17:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1831 transitions. [2022-07-12 10:17:20,924 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8073192239858906 [2022-07-12 10:17:20,924 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1831 transitions. [2022-07-12 10:17:20,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1831 transitions. [2022-07-12 10:17:20,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:20,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1831 transitions. [2022-07-12 10:17:20,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.44444444444446) internal successors, (1831), 9 states have internal predecessors, (1831), 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 10:17:20,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 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 10:17:20,934 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 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 10:17:20,935 INFO L186 Difference]: Start difference. First operand has 207 places, 207 transitions, 429 flow. Second operand 9 states and 1831 transitions. [2022-07-12 10:17:20,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 217 transitions, 491 flow [2022-07-12 10:17:20,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 217 transitions, 489 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:20,940 INFO L242 Difference]: Finished difference. Result has 217 places, 213 transitions, 477 flow [2022-07-12 10:17:20,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=477, PETRI_PLACES=217, PETRI_TRANSITIONS=213} [2022-07-12 10:17:20,942 INFO L279 CegarLoopForPetriNet]: 206 programPoint places, 11 predicate places. [2022-07-12 10:17:20,942 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 213 transitions, 477 flow [2022-07-12 10:17:20,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 203.1) internal successors, (2031), 10 states have internal predecessors, (2031), 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 10:17:20,944 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:20,944 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:20,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:21,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:21,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:17:21,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:21,160 INFO L85 PathProgramCache]: Analyzing trace with hash 567047944, now seen corresponding path program 2 times [2022-07-12 10:17:21,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:21,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273557163] [2022-07-12 10:17:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:21,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:17:21,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:21,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273557163] [2022-07-12 10:17:21,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273557163] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:21,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704786500] [2022-07-12 10:17:21,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:17:21,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:21,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:21,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:21,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:17:21,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:17:21,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:17:21,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:21,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:17:21,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:17:21,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704786500] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:21,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:21,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:21,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029299320] [2022-07-12 10:17:21,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:21,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:21,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:21,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:21,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:21,584 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 252 [2022-07-12 10:17:21,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 213 transitions, 477 flow. Second operand has 18 states, 18 states have (on average 203.27777777777777) internal successors, (3659), 18 states have internal predecessors, (3659), 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 10:17:21,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:21,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 252 [2022-07-12 10:17:21,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:21,794 INFO L129 PetriNetUnfolder]: 9/346 cut-off events. [2022-07-12 10:17:21,794 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-12 10:17:21,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 346 events. 9/346 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1374 event pairs, 0 based on Foata normal form. 4/333 useless extension candidates. Maximal degree in co-relation 442. Up to 11 conditions per place. [2022-07-12 10:17:21,797 INFO L132 encePairwiseOnDemand]: 246/252 looper letters, 19 selfloop transitions, 21 changer transitions 0/237 dead transitions. [2022-07-12 10:17:21,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 237 transitions, 665 flow [2022-07-12 10:17:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4265 transitions. [2022-07-12 10:17:21,806 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8059334845049131 [2022-07-12 10:17:21,806 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4265 transitions. [2022-07-12 10:17:21,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4265 transitions. [2022-07-12 10:17:21,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:21,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4265 transitions. [2022-07-12 10:17:21,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 203.0952380952381) internal successors, (4265), 21 states have internal predecessors, (4265), 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 10:17:21,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 252.0) internal successors, (5544), 22 states have internal predecessors, (5544), 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 10:17:21,826 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 252.0) internal successors, (5544), 22 states have internal predecessors, (5544), 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 10:17:21,826 INFO L186 Difference]: Start difference. First operand has 217 places, 213 transitions, 477 flow. Second operand 21 states and 4265 transitions. [2022-07-12 10:17:21,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 237 transitions, 665 flow [2022-07-12 10:17:21,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 651 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:21,832 INFO L242 Difference]: Finished difference. Result has 241 places, 226 transitions, 601 flow [2022-07-12 10:17:21,833 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=601, PETRI_PLACES=241, PETRI_TRANSITIONS=226} [2022-07-12 10:17:21,833 INFO L279 CegarLoopForPetriNet]: 206 programPoint places, 35 predicate places. [2022-07-12 10:17:21,834 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 226 transitions, 601 flow [2022-07-12 10:17:21,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 203.27777777777777) internal successors, (3659), 18 states have internal predecessors, (3659), 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 10:17:21,835 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:21,835 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:21,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:22,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-12 10:17:22,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:17:22,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:22,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1472913416, now seen corresponding path program 3 times [2022-07-12 10:17:22,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:22,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708882404] [2022-07-12 10:17:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:22,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:17:22,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:22,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708882404] [2022-07-12 10:17:22,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708882404] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:22,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390785670] [2022-07-12 10:17:22,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:17:22,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:22,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:22,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:22,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:17:22,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-12 10:17:22,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:17:22,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:22,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:17:22,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:17:22,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390785670] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:22,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:22,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-12 10:17:22,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611910849] [2022-07-12 10:17:22,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:22,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 10:17:22,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:22,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 10:17:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-12 10:17:22,564 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 252 [2022-07-12 10:17:22,568 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 226 transitions, 601 flow. Second operand has 23 states, 23 states have (on average 203.43478260869566) internal successors, (4679), 23 states have internal predecessors, (4679), 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 10:17:22,568 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:22,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 252 [2022-07-12 10:17:22,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:22,863 INFO L129 PetriNetUnfolder]: 9/361 cut-off events. [2022-07-12 10:17:22,863 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-12 10:17:22,864 INFO L84 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 361 events. 9/361 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1374 event pairs, 0 based on Foata normal form. 3/347 useless extension candidates. Maximal degree in co-relation 538. Up to 17 conditions per place. [2022-07-12 10:17:22,866 INFO L132 encePairwiseOnDemand]: 246/252 looper letters, 25 selfloop transitions, 30 changer transitions 0/252 dead transitions. [2022-07-12 10:17:22,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 252 transitions, 857 flow [2022-07-12 10:17:22,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 10:17:22,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-12 10:17:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6088 transitions. [2022-07-12 10:17:22,878 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8052910052910053 [2022-07-12 10:17:22,878 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6088 transitions. [2022-07-12 10:17:22,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6088 transitions. [2022-07-12 10:17:22,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:22,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6088 transitions. [2022-07-12 10:17:22,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 202.93333333333334) internal successors, (6088), 30 states have internal predecessors, (6088), 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 10:17:22,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 252.0) internal successors, (7812), 31 states have internal predecessors, (7812), 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 10:17:22,919 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 252.0) internal successors, (7812), 31 states have internal predecessors, (7812), 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 10:17:22,920 INFO L186 Difference]: Start difference. First operand has 241 places, 226 transitions, 601 flow. Second operand 30 states and 6088 transitions. [2022-07-12 10:17:22,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 252 transitions, 857 flow [2022-07-12 10:17:22,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 252 transitions, 827 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:22,928 INFO L242 Difference]: Finished difference. Result has 268 places, 236 transitions, 729 flow [2022-07-12 10:17:22,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=729, PETRI_PLACES=268, PETRI_TRANSITIONS=236} [2022-07-12 10:17:22,929 INFO L279 CegarLoopForPetriNet]: 206 programPoint places, 62 predicate places. [2022-07-12 10:17:22,929 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 236 transitions, 729 flow [2022-07-12 10:17:22,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 203.43478260869566) internal successors, (4679), 23 states have internal predecessors, (4679), 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 10:17:22,931 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:22,931 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-07-12 10:17:22,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 10:17:23,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:23,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:17:23,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:23,150 INFO L85 PathProgramCache]: Analyzing trace with hash 715826012, now seen corresponding path program 4 times [2022-07-12 10:17:23,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:23,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212380836] [2022-07-12 10:17:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:23,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:23,179 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:23,218 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:23,219 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:23,220 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-12 10:17:23,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-12 10:17:23,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-12 10:17:23,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-12 10:17:23,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-12 10:17:23,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:17:23,223 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-07-12 10:17:23,225 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:23,225 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:17:23,251 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:17:23,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 270 places, 325 transitions, 668 flow [2022-07-12 10:17:23,312 INFO L129 PetriNetUnfolder]: 118/622 cut-off events. [2022-07-12 10:17:23,312 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:17:23,321 INFO L84 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 622 events. 118/622 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3184 event pairs, 0 based on Foata normal form. 0/492 useless extension candidates. Maximal degree in co-relation 390. Up to 12 conditions per place. [2022-07-12 10:17:23,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 325 transitions, 668 flow [2022-07-12 10:17:23,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 325 transitions, 668 flow [2022-07-12 10:17:23,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:23,331 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@3d56e0c1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@74438cd0 [2022-07-12 10:17:23,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-12 10:17:23,339 INFO L129 PetriNetUnfolder]: 19/157 cut-off events. [2022-07-12 10:17:23,339 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:17:23,339 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:23,340 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] [2022-07-12 10:17:23,340 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:17:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:23,340 INFO L85 PathProgramCache]: Analyzing trace with hash 842848576, now seen corresponding path program 1 times [2022-07-12 10:17:23,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:23,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986435867] [2022-07-12 10:17:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:23,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:23,359 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 10:17:23,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:23,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986435867] [2022-07-12 10:17:23,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986435867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:23,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:23,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:23,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785296630] [2022-07-12 10:17:23,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:23,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:23,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:23,363 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 325 [2022-07-12 10:17:23,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 325 transitions, 668 flow. Second operand has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 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 10:17:23,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:23,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 325 [2022-07-12 10:17:23,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:23,441 INFO L129 PetriNetUnfolder]: 17/517 cut-off events. [2022-07-12 10:17:23,441 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-12 10:17:23,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 517 events. 17/517 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2687 event pairs, 0 based on Foata normal form. 125/613 useless extension candidates. Maximal degree in co-relation 339. Up to 14 conditions per place. [2022-07-12 10:17:23,447 INFO L132 encePairwiseOnDemand]: 272/325 looper letters, 13 selfloop transitions, 2 changer transitions 0/275 dead transitions. [2022-07-12 10:17:23,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 275 transitions, 598 flow [2022-07-12 10:17:23,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:23,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 847 transitions. [2022-07-12 10:17:23,450 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8687179487179487 [2022-07-12 10:17:23,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 847 transitions. [2022-07-12 10:17:23,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 847 transitions. [2022-07-12 10:17:23,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:23,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 847 transitions. [2022-07-12 10:17:23,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 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 10:17:23,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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 10:17:23,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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 10:17:23,454 INFO L186 Difference]: Start difference. First operand has 270 places, 325 transitions, 668 flow. Second operand 3 states and 847 transitions. [2022-07-12 10:17:23,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 275 transitions, 598 flow [2022-07-12 10:17:23,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 275 transitions, 598 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:23,459 INFO L242 Difference]: Finished difference. Result has 269 places, 272 transitions, 572 flow [2022-07-12 10:17:23,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=572, PETRI_PLACES=269, PETRI_TRANSITIONS=272} [2022-07-12 10:17:23,460 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, -1 predicate places. [2022-07-12 10:17:23,460 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 272 transitions, 572 flow [2022-07-12 10:17:23,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 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 10:17:23,461 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:23,461 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] [2022-07-12 10:17:23,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:17:23,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:17:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:23,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1567446095, now seen corresponding path program 1 times [2022-07-12 10:17:23,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:23,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880919590] [2022-07-12 10:17:23,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:23,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:23,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:23,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880919590] [2022-07-12 10:17:23,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880919590] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:23,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894110070] [2022-07-12 10:17:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:23,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:23,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:23,491 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:23,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:17:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:23,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 10:17:23,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:17:23,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:17:23,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894110070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:23,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:17:23,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-12 10:17:23,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612116414] [2022-07-12 10:17:23,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:23,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:23,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:23,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:23,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:17:23,583 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 325 [2022-07-12 10:17:23,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 272 transitions, 572 flow. Second operand has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 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 10:17:23,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:23,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 325 [2022-07-12 10:17:23,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:23,650 INFO L129 PetriNetUnfolder]: 13/421 cut-off events. [2022-07-12 10:17:23,650 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-12 10:17:23,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 421 events. 13/421 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1985 event pairs, 0 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 426. Up to 16 conditions per place. [2022-07-12 10:17:23,659 INFO L132 encePairwiseOnDemand]: 322/325 looper letters, 13 selfloop transitions, 2 changer transitions 0/276 dead transitions. [2022-07-12 10:17:23,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 276 transitions, 610 flow [2022-07-12 10:17:23,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:23,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2022-07-12 10:17:23,662 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8164102564102564 [2022-07-12 10:17:23,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2022-07-12 10:17:23,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2022-07-12 10:17:23,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:23,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2022-07-12 10:17:23,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 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 10:17:23,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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 10:17:23,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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 10:17:23,666 INFO L186 Difference]: Start difference. First operand has 269 places, 272 transitions, 572 flow. Second operand 3 states and 796 transitions. [2022-07-12 10:17:23,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 276 transitions, 610 flow [2022-07-12 10:17:23,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 276 transitions, 608 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:23,673 INFO L242 Difference]: Finished difference. Result has 271 places, 273 transitions, 582 flow [2022-07-12 10:17:23,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=582, PETRI_PLACES=271, PETRI_TRANSITIONS=273} [2022-07-12 10:17:23,674 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 1 predicate places. [2022-07-12 10:17:23,675 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 273 transitions, 582 flow [2022-07-12 10:17:23,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 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 10:17:23,675 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:23,675 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 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] [2022-07-12 10:17:23,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:23,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:23,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:17:23,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:23,896 INFO L85 PathProgramCache]: Analyzing trace with hash -909156870, now seen corresponding path program 1 times [2022-07-12 10:17:23,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:23,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682177342] [2022-07-12 10:17:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:23,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:17:23,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:23,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682177342] [2022-07-12 10:17:23,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682177342] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:23,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326656361] [2022-07-12 10:17:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:23,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:23,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:23,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:23,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:17:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:24,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:24,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:17:24,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:17:24,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326656361] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:24,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:24,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:24,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532512822] [2022-07-12 10:17:24,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:24,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:24,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:24,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:24,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:24,112 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 325 [2022-07-12 10:17:24,114 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 273 transitions, 582 flow. Second operand has 10 states, 10 states have (on average 261.2) internal successors, (2612), 10 states have internal predecessors, (2612), 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 10:17:24,114 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:24,114 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 325 [2022-07-12 10:17:24,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:24,225 INFO L129 PetriNetUnfolder]: 13/428 cut-off events. [2022-07-12 10:17:24,226 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-12 10:17:24,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 428 events. 13/428 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1980 event pairs, 0 based on Foata normal form. 2/410 useless extension candidates. Maximal degree in co-relation 411. Up to 11 conditions per place. [2022-07-12 10:17:24,233 INFO L132 encePairwiseOnDemand]: 319/325 looper letters, 14 selfloop transitions, 9 changer transitions 0/283 dead transitions. [2022-07-12 10:17:24,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 283 transitions, 650 flow [2022-07-12 10:17:24,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2356 transitions. [2022-07-12 10:17:24,239 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8054700854700855 [2022-07-12 10:17:24,239 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2356 transitions. [2022-07-12 10:17:24,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2356 transitions. [2022-07-12 10:17:24,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:24,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2356 transitions. [2022-07-12 10:17:24,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 261.77777777777777) internal successors, (2356), 9 states have internal predecessors, (2356), 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 10:17:24,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 325.0) internal successors, (3250), 10 states have internal predecessors, (3250), 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 10:17:24,249 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 325.0) internal successors, (3250), 10 states have internal predecessors, (3250), 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 10:17:24,249 INFO L186 Difference]: Start difference. First operand has 271 places, 273 transitions, 582 flow. Second operand 9 states and 2356 transitions. [2022-07-12 10:17:24,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 283 transitions, 650 flow [2022-07-12 10:17:24,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 283 transitions, 648 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:24,256 INFO L242 Difference]: Finished difference. Result has 281 places, 279 transitions, 630 flow [2022-07-12 10:17:24,257 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=630, PETRI_PLACES=281, PETRI_TRANSITIONS=279} [2022-07-12 10:17:24,259 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 11 predicate places. [2022-07-12 10:17:24,259 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 279 transitions, 630 flow [2022-07-12 10:17:24,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 261.2) internal successors, (2612), 10 states have internal predecessors, (2612), 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 10:17:24,260 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:24,261 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2022-07-12 10:17:24,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:24,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:24,477 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:17:24,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:24,477 INFO L85 PathProgramCache]: Analyzing trace with hash 989555546, now seen corresponding path program 2 times [2022-07-12 10:17:24,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:24,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591963380] [2022-07-12 10:17:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:24,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:17:24,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:24,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591963380] [2022-07-12 10:17:24,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591963380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:24,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31965051] [2022-07-12 10:17:24,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:17:24,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:24,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:24,550 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:24,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:17:24,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:17:24,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:17:24,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:24,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:17:24,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:17:24,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31965051] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:24,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:24,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:24,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996960158] [2022-07-12 10:17:24,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:24,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:24,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:24,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:24,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:24,749 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 325 [2022-07-12 10:17:24,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 279 transitions, 630 flow. Second operand has 18 states, 18 states have (on average 261.3333333333333) internal successors, (4704), 18 states have internal predecessors, (4704), 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 10:17:24,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:24,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 325 [2022-07-12 10:17:24,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:24,992 INFO L129 PetriNetUnfolder]: 13/448 cut-off events. [2022-07-12 10:17:24,993 INFO L130 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-07-12 10:17:24,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 448 events. 13/448 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1980 event pairs, 0 based on Foata normal form. 4/432 useless extension candidates. Maximal degree in co-relation 415. Up to 11 conditions per place. [2022-07-12 10:17:25,001 INFO L132 encePairwiseOnDemand]: 319/325 looper letters, 22 selfloop transitions, 21 changer transitions 0/303 dead transitions. [2022-07-12 10:17:25,001 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 303 transitions, 824 flow [2022-07-12 10:17:25,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:25,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5486 transitions. [2022-07-12 10:17:25,014 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8038095238095239 [2022-07-12 10:17:25,014 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5486 transitions. [2022-07-12 10:17:25,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5486 transitions. [2022-07-12 10:17:25,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:25,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5486 transitions. [2022-07-12 10:17:25,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 261.23809523809524) internal successors, (5486), 21 states have internal predecessors, (5486), 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 10:17:25,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 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 10:17:25,040 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 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 10:17:25,040 INFO L186 Difference]: Start difference. First operand has 281 places, 279 transitions, 630 flow. Second operand 21 states and 5486 transitions. [2022-07-12 10:17:25,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 303 transitions, 824 flow [2022-07-12 10:17:25,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 303 transitions, 810 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:25,047 INFO L242 Difference]: Finished difference. Result has 305 places, 292 transitions, 754 flow [2022-07-12 10:17:25,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=754, PETRI_PLACES=305, PETRI_TRANSITIONS=292} [2022-07-12 10:17:25,048 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 35 predicate places. [2022-07-12 10:17:25,049 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 292 transitions, 754 flow [2022-07-12 10:17:25,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 261.3333333333333) internal successors, (4704), 18 states have internal predecessors, (4704), 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 10:17:25,050 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:25,050 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 2, 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] [2022-07-12 10:17:25,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:25,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:25,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:17:25,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:25,251 INFO L85 PathProgramCache]: Analyzing trace with hash 956161562, now seen corresponding path program 3 times [2022-07-12 10:17:25,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:25,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484092160] [2022-07-12 10:17:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:25,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:17:25,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:25,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484092160] [2022-07-12 10:17:25,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484092160] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:25,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806748646] [2022-07-12 10:17:25,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:17:25,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:25,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:25,398 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:25,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:17:25,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-12 10:17:25,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:17:25,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:25,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:17:25,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:17:25,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806748646] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:25,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:25,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-12 10:17:25,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755206629] [2022-07-12 10:17:25,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:25,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 10:17:25,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:25,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 10:17:25,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-12 10:17:25,765 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 325 [2022-07-12 10:17:25,770 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 292 transitions, 754 flow. Second operand has 23 states, 23 states have (on average 261.4782608695652) internal successors, (6014), 23 states have internal predecessors, (6014), 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 10:17:25,770 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:25,770 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 325 [2022-07-12 10:17:25,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:26,110 INFO L129 PetriNetUnfolder]: 13/463 cut-off events. [2022-07-12 10:17:26,110 INFO L130 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-07-12 10:17:26,115 INFO L84 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 463 events. 13/463 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1980 event pairs, 0 based on Foata normal form. 3/446 useless extension candidates. Maximal degree in co-relation 450. Up to 17 conditions per place. [2022-07-12 10:17:26,117 INFO L132 encePairwiseOnDemand]: 319/325 looper letters, 28 selfloop transitions, 30 changer transitions 0/318 dead transitions. [2022-07-12 10:17:26,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 318 transitions, 1016 flow [2022-07-12 10:17:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 10:17:26,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-12 10:17:26,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7831 transitions. [2022-07-12 10:17:26,128 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8031794871794872 [2022-07-12 10:17:26,129 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7831 transitions. [2022-07-12 10:17:26,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7831 transitions. [2022-07-12 10:17:26,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:26,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7831 transitions. [2022-07-12 10:17:26,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 261.03333333333336) internal successors, (7831), 30 states have internal predecessors, (7831), 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 10:17:26,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 325.0) internal successors, (10075), 31 states have internal predecessors, (10075), 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 10:17:26,193 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 325.0) internal successors, (10075), 31 states have internal predecessors, (10075), 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 10:17:26,193 INFO L186 Difference]: Start difference. First operand has 305 places, 292 transitions, 754 flow. Second operand 30 states and 7831 transitions. [2022-07-12 10:17:26,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 318 transitions, 1016 flow [2022-07-12 10:17:26,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 318 transitions, 986 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:26,200 INFO L242 Difference]: Finished difference. Result has 332 places, 302 transitions, 882 flow [2022-07-12 10:17:26,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=882, PETRI_PLACES=332, PETRI_TRANSITIONS=302} [2022-07-12 10:17:26,201 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 62 predicate places. [2022-07-12 10:17:26,201 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 302 transitions, 882 flow [2022-07-12 10:17:26,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 261.4782608695652) internal successors, (6014), 23 states have internal predecessors, (6014), 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 10:17:26,202 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:26,203 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 2, 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] [2022-07-12 10:17:26,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:26,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:26,425 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:17:26,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:26,426 INFO L85 PathProgramCache]: Analyzing trace with hash 731956713, now seen corresponding path program 4 times [2022-07-12 10:17:26,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:26,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589472125] [2022-07-12 10:17:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:26,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:26,452 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:26,497 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:26,497 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:26,498 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-12 10:17:26,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-12 10:17:26,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-12 10:17:26,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-12 10:17:26,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-12 10:17:26,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-12 10:17:26,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:17:26,499 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-07-12 10:17:26,499 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:26,500 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:17:26,526 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:17:26,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 330 places, 398 transitions, 826 flow [2022-07-12 10:17:26,681 INFO L129 PetriNetUnfolder]: 168/889 cut-off events. [2022-07-12 10:17:26,682 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-12 10:17:26,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 889 events. 168/889 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4860 event pairs, 1 based on Foata normal form. 0/706 useless extension candidates. Maximal degree in co-relation 630. Up to 16 conditions per place. [2022-07-12 10:17:26,695 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 398 transitions, 826 flow [2022-07-12 10:17:26,710 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 398 transitions, 826 flow [2022-07-12 10:17:26,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:26,712 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@3d56e0c1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@74438cd0 [2022-07-12 10:17:26,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-12 10:17:26,721 INFO L129 PetriNetUnfolder]: 17/149 cut-off events. [2022-07-12 10:17:26,722 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:17:26,722 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:26,722 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] [2022-07-12 10:17:26,722 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:17:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:26,723 INFO L85 PathProgramCache]: Analyzing trace with hash -890788929, now seen corresponding path program 1 times [2022-07-12 10:17:26,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:26,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526097743] [2022-07-12 10:17:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:26,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:26,737 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 10:17:26,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:26,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526097743] [2022-07-12 10:17:26,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526097743] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:26,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:26,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:26,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228908903] [2022-07-12 10:17:26,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:26,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:26,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:26,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:26,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:26,740 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 398 [2022-07-12 10:17:26,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 398 transitions, 826 flow. Second operand has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 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 10:17:26,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:26,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 398 [2022-07-12 10:17:26,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:26,864 INFO L129 PetriNetUnfolder]: 27/737 cut-off events. [2022-07-12 10:17:26,865 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-12 10:17:26,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 737 events. 27/737 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4191 event pairs, 1 based on Foata normal form. 256/951 useless extension candidates. Maximal degree in co-relation 527. Up to 16 conditions per place. [2022-07-12 10:17:26,876 INFO L132 encePairwiseOnDemand]: 336/398 looper letters, 6 selfloop transitions, 0 changer transitions 0/331 dead transitions. [2022-07-12 10:17:26,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 331 transitions, 704 flow [2022-07-12 10:17:26,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:26,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:26,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 718 transitions. [2022-07-12 10:17:26,877 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9020100502512562 [2022-07-12 10:17:26,877 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 718 transitions. [2022-07-12 10:17:26,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 718 transitions. [2022-07-12 10:17:26,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:26,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 718 transitions. [2022-07-12 10:17:26,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 359.0) internal successors, (718), 2 states have internal predecessors, (718), 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 10:17:26,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 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 10:17:26,880 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 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 10:17:26,880 INFO L186 Difference]: Start difference. First operand has 330 places, 398 transitions, 826 flow. Second operand 2 states and 718 transitions. [2022-07-12 10:17:26,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 331 transitions, 704 flow [2022-07-12 10:17:26,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 331 transitions, 704 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:26,885 INFO L242 Difference]: Finished difference. Result has 326 places, 331 transitions, 692 flow [2022-07-12 10:17:26,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=692, PETRI_PLACES=326, PETRI_TRANSITIONS=331} [2022-07-12 10:17:26,886 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, -4 predicate places. [2022-07-12 10:17:26,886 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 331 transitions, 692 flow [2022-07-12 10:17:26,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 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 10:17:26,886 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:26,886 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] [2022-07-12 10:17:26,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:17:26,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:17:26,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:26,887 INFO L85 PathProgramCache]: Analyzing trace with hash 616762880, now seen corresponding path program 1 times [2022-07-12 10:17:26,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:26,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432812981] [2022-07-12 10:17:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:26,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:26,907 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 10:17:26,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:26,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432812981] [2022-07-12 10:17:26,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432812981] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:26,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:26,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:26,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412752600] [2022-07-12 10:17:26,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:26,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:26,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:26,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:26,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:26,911 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 398 [2022-07-12 10:17:26,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 331 transitions, 692 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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 10:17:26,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:26,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 398 [2022-07-12 10:17:26,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:27,024 INFO L129 PetriNetUnfolder]: 27/741 cut-off events. [2022-07-12 10:17:27,025 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-12 10:17:27,036 INFO L84 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 741 events. 27/741 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4162 event pairs, 1 based on Foata normal form. 0/699 useless extension candidates. Maximal degree in co-relation 791. Up to 23 conditions per place. [2022-07-12 10:17:27,039 INFO L132 encePairwiseOnDemand]: 395/398 looper letters, 15 selfloop transitions, 2 changer transitions 0/335 dead transitions. [2022-07-12 10:17:27,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 335 transitions, 734 flow [2022-07-12 10:17:27,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:27,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2022-07-12 10:17:27,042 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8140703517587939 [2022-07-12 10:17:27,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2022-07-12 10:17:27,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2022-07-12 10:17:27,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:27,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2022-07-12 10:17:27,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 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 10:17:27,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 10:17:27,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 10:17:27,046 INFO L186 Difference]: Start difference. First operand has 326 places, 331 transitions, 692 flow. Second operand 3 states and 972 transitions. [2022-07-12 10:17:27,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 335 transitions, 734 flow [2022-07-12 10:17:27,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 335 transitions, 734 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:27,052 INFO L242 Difference]: Finished difference. Result has 329 places, 332 transitions, 704 flow [2022-07-12 10:17:27,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=704, PETRI_PLACES=329, PETRI_TRANSITIONS=332} [2022-07-12 10:17:27,053 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, -1 predicate places. [2022-07-12 10:17:27,053 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 332 transitions, 704 flow [2022-07-12 10:17:27,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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 10:17:27,054 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:27,054 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] [2022-07-12 10:17:27,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:17:27,054 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:17:27,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:27,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1846734079, now seen corresponding path program 1 times [2022-07-12 10:17:27,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:27,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251899412] [2022-07-12 10:17:27,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:27,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:27,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:27,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251899412] [2022-07-12 10:17:27,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251899412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:27,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173223632] [2022-07-12 10:17:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:27,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:27,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:27,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:27,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:17:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:27,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 10:17:27,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:17:27,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:17:27,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173223632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:27,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:17:27,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-12 10:17:27,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425345773] [2022-07-12 10:17:27,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:27,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:27,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:27,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:27,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:17:27,184 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 398 [2022-07-12 10:17:27,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 332 transitions, 704 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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 10:17:27,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:27,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 398 [2022-07-12 10:17:27,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:27,294 INFO L129 PetriNetUnfolder]: 23/645 cut-off events. [2022-07-12 10:17:27,295 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-07-12 10:17:27,305 INFO L84 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 645 events. 23/645 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3490 event pairs, 1 based on Foata normal form. 0/610 useless extension candidates. Maximal degree in co-relation 708. Up to 30 conditions per place. [2022-07-12 10:17:27,308 INFO L132 encePairwiseOnDemand]: 395/398 looper letters, 15 selfloop transitions, 2 changer transitions 0/336 dead transitions. [2022-07-12 10:17:27,308 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 336 transitions, 746 flow [2022-07-12 10:17:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:27,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2022-07-12 10:17:27,311 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8140703517587939 [2022-07-12 10:17:27,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2022-07-12 10:17:27,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2022-07-12 10:17:27,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:27,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2022-07-12 10:17:27,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 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 10:17:27,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 10:17:27,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 10:17:27,316 INFO L186 Difference]: Start difference. First operand has 329 places, 332 transitions, 704 flow. Second operand 3 states and 972 transitions. [2022-07-12 10:17:27,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 336 transitions, 746 flow [2022-07-12 10:17:27,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 336 transitions, 744 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:27,321 INFO L242 Difference]: Finished difference. Result has 331 places, 333 transitions, 714 flow [2022-07-12 10:17:27,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=714, PETRI_PLACES=331, PETRI_TRANSITIONS=333} [2022-07-12 10:17:27,323 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, 1 predicate places. [2022-07-12 10:17:27,323 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 333 transitions, 714 flow [2022-07-12 10:17:27,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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 10:17:27,323 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:27,323 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] [2022-07-12 10:17:27,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:27,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-12 10:17:27,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:17:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:27,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1623135996, now seen corresponding path program 1 times [2022-07-12 10:17:27,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:27,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234078086] [2022-07-12 10:17:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:27,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:17:27,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:27,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234078086] [2022-07-12 10:17:27,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234078086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:27,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965718621] [2022-07-12 10:17:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:27,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:27,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:27,576 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:27,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:17:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:27,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 10:17:27,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:17:27,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:17:27,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965718621] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:27,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:17:27,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-12 10:17:27,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615663294] [2022-07-12 10:17:27,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:27,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:27,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:27,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:27,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:17:27,674 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 398 [2022-07-12 10:17:27,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 333 transitions, 714 flow. Second operand has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 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 10:17:27,675 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:27,675 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 398 [2022-07-12 10:17:27,675 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:27,824 INFO L129 PetriNetUnfolder]: 26/798 cut-off events. [2022-07-12 10:17:27,824 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-12 10:17:27,839 INFO L84 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 798 events. 26/798 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3989 event pairs, 1 based on Foata normal form. 0/760 useless extension candidates. Maximal degree in co-relation 881. Up to 36 conditions per place. [2022-07-12 10:17:27,842 INFO L132 encePairwiseOnDemand]: 395/398 looper letters, 16 selfloop transitions, 2 changer transitions 0/337 dead transitions. [2022-07-12 10:17:27,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 337 transitions, 758 flow [2022-07-12 10:17:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 970 transitions. [2022-07-12 10:17:27,844 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8123953098827471 [2022-07-12 10:17:27,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 970 transitions. [2022-07-12 10:17:27,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 970 transitions. [2022-07-12 10:17:27,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:27,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 970 transitions. [2022-07-12 10:17:27,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 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 10:17:27,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 10:17:27,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 10:17:27,848 INFO L186 Difference]: Start difference. First operand has 331 places, 333 transitions, 714 flow. Second operand 3 states and 970 transitions. [2022-07-12 10:17:27,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 337 transitions, 758 flow [2022-07-12 10:17:27,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 337 transitions, 756 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:27,854 INFO L242 Difference]: Finished difference. Result has 333 places, 334 transitions, 724 flow [2022-07-12 10:17:27,854 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=724, PETRI_PLACES=333, PETRI_TRANSITIONS=334} [2022-07-12 10:17:27,855 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, 3 predicate places. [2022-07-12 10:17:27,855 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 334 transitions, 724 flow [2022-07-12 10:17:27,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 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 10:17:27,855 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:27,855 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] [2022-07-12 10:17:27,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:28,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 10:17:28,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:17:28,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:28,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1970085585, now seen corresponding path program 1 times [2022-07-12 10:17:28,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:28,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557680666] [2022-07-12 10:17:28,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:28,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:28,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:28,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557680666] [2022-07-12 10:17:28,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557680666] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:28,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479811173] [2022-07-12 10:17:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:28,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:28,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:28,114 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:28,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:17:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:28,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:28,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:28,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:28,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479811173] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:28,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:28,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:28,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033056470] [2022-07-12 10:17:28,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:28,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:28,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:28,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:28,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:28,255 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 398 [2022-07-12 10:17:28,257 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 334 transitions, 724 flow. Second operand has 10 states, 10 states have (on average 319.1) internal successors, (3191), 10 states have internal predecessors, (3191), 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 10:17:28,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:28,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 398 [2022-07-12 10:17:28,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:28,438 INFO L129 PetriNetUnfolder]: 26/805 cut-off events. [2022-07-12 10:17:28,439 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-07-12 10:17:28,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 805 events. 26/805 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3974 event pairs, 1 based on Foata normal form. 2/772 useless extension candidates. Maximal degree in co-relation 890. Up to 20 conditions per place. [2022-07-12 10:17:28,458 INFO L132 encePairwiseOnDemand]: 392/398 looper letters, 16 selfloop transitions, 9 changer transitions 0/344 dead transitions. [2022-07-12 10:17:28,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 344 transitions, 796 flow [2022-07-12 10:17:28,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:28,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:28,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2880 transitions. [2022-07-12 10:17:28,462 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8040201005025126 [2022-07-12 10:17:28,463 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2880 transitions. [2022-07-12 10:17:28,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2880 transitions. [2022-07-12 10:17:28,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:28,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2880 transitions. [2022-07-12 10:17:28,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 320.0) internal successors, (2880), 9 states have internal predecessors, (2880), 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 10:17:28,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 398.0) internal successors, (3980), 10 states have internal predecessors, (3980), 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 10:17:28,472 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 398.0) internal successors, (3980), 10 states have internal predecessors, (3980), 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 10:17:28,472 INFO L186 Difference]: Start difference. First operand has 333 places, 334 transitions, 724 flow. Second operand 9 states and 2880 transitions. [2022-07-12 10:17:28,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 344 transitions, 796 flow [2022-07-12 10:17:28,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 344 transitions, 794 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:28,478 INFO L242 Difference]: Finished difference. Result has 343 places, 340 transitions, 772 flow [2022-07-12 10:17:28,479 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=772, PETRI_PLACES=343, PETRI_TRANSITIONS=340} [2022-07-12 10:17:28,479 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, 13 predicate places. [2022-07-12 10:17:28,480 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 340 transitions, 772 flow [2022-07-12 10:17:28,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 319.1) internal successors, (3191), 10 states have internal predecessors, (3191), 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 10:17:28,481 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:28,481 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:28,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:28,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 10:17:28,708 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:17:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash 566379377, now seen corresponding path program 2 times [2022-07-12 10:17:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:28,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904565047] [2022-07-12 10:17:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:28,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:28,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904565047] [2022-07-12 10:17:28,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904565047] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:28,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091831692] [2022-07-12 10:17:28,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:17:28,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:28,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:28,773 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:28,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:17:28,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 10:17:28,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:17:28,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 10:17:28,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:28,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-07-12 10:17:29,050 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:17:29,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 10:17:29,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-12 10:17:29,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 10:17:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 10:17:29,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:17:29,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091831692] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:29,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:17:29,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 19 [2022-07-12 10:17:29,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812016580] [2022-07-12 10:17:29,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:29,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:17:29,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:29,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:17:29,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:17:29,249 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 398 [2022-07-12 10:17:29,251 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 340 transitions, 772 flow. Second operand has 12 states, 12 states have (on average 267.3333333333333) internal successors, (3208), 12 states have internal predecessors, (3208), 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 10:17:29,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:29,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 398 [2022-07-12 10:17:29,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand